CN115751666B - Control method and device of heat pump unit, storage medium and air source heat pump unit - Google Patents
Control method and device of heat pump unit, storage medium and air source heat pump unit Download PDFInfo
- Publication number
- CN115751666B CN115751666B CN202211565885.0A CN202211565885A CN115751666B CN 115751666 B CN115751666 B CN 115751666B CN 202211565885 A CN202211565885 A CN 202211565885A CN 115751666 B CN115751666 B CN 115751666B
- Authority
- CN
- China
- Prior art keywords
- heat pump
- pump unit
- temperature
- water
- control target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 162
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003247 decreasing effect Effects 0.000 claims abstract description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 19
- 238000005338 heat storage Methods 0.000 abstract description 18
- 238000010977 unit operation Methods 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and device of a heat pump unit, a storage medium and an air source heat pump unit, belonging to the field of air conditioning, wherein the control method comprises the following steps: after the heat pump unit is started and then stopped at a temperature point, acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit; calculating the real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃; when DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T; and controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi. The heat pump unit heat dissipation terminal and the corresponding heat storage condition of the building enclosure are judged more truly, so that the control target for adjusting the unit operation is actively controlled according to the obtained actual condition, and the unit is combined with the enclosure structure and the heat dissipation terminal in an inert manner, so that the energy-saving operation is realized.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a control method and device of a heat pump unit, a storage medium and an air source heat pump unit.
Background
Along with the continuous popularization of clean energy of energy-saving buildings in various places, the air source heat pump units are increasingly applied to the scenes of cooling and heating of the buildings, and the development of the market also brings higher requirements to the operation energy conservation of the heat pump units. Whether the heat pump unit can operate in an energy-saving mode is closely related to the condition of the building enclosure structure and the tail end. The heat storage characteristic of the tail end of the water system and the heat storage characteristic of the building are fully utilized, so that the operation energy consumption of the heat pump unit can be greatly reduced, but the energy conservation performance of the building envelope is estimated and evaluated often at too great cost and cannot be realized.
Patent number 201811150504.6 proposes an optimization method for the operation of a combined cooling heating and power system based on the thermal inertia of civil buildings, but in actual engineering, it is not practical to explicitly measure various thermophysical parameters of a building maintenance structure of a user; the patent number 201510091227.6 proposes a winter heating operation peak load obtaining method based on the variable thermal resistance of the enclosure structure, but the method is more suitable for new buildings and is not suitable for reconstruction engineering; the patent number 201910051789.6 proposes a control method for a multi-split air conditioner, and determines the start-stop time of a heat pump unit in a numerical simulation mode, but in practical application, it is not practical to accurately obtain various parameters of a maintenance structure.
As can be seen, in the current research results, the evaluation mode for the thermal inertia (also referred to as thermal inertia) of the building is obtained after the actual building envelope material parameters are known. In particular, for the existing building, the parameters of the building materials cannot be accurately measured, and the thermal inertia of the existing building cannot be calculated more specifically. Meanwhile, due to the diversification of the actual use situations of customers, different heat storage characteristics are brought by different terminal types (such as the terminal of a radiator with larger water capacity and the terminal of a fan coil with smaller water capacity), and the heat pump unit can not well identify and utilize the terminal characteristics.
In practical engineering, the air source heat pump water machine (namely the air source heat pump unit) for small households often realizes the adjustment of indoor temperature by controlling water temperature, and only a few indoor temperatures fed back by an indoor temperature sensor serve as control targets. Therefore, if the heat pump unit is regulated to operate based on the heat storage conditions of the building and the tail end while no additional control load is added to the heat pump unit, the energy-saving operation can be effectively realized.
Disclosure of Invention
Therefore, the invention provides a control method and device of a heat pump unit, a storage medium and an air source heat pump unit, which can solve the technical problems that in the prior art, building material parameters in a building correspondingly installed by the air source heat pump unit cannot be accurately measured, difference exists at the tail ends of heat dissipation, the air conditioner operation control is difficult to accurately control according to the heat storage conditions of the building and the tail ends, and the energy saving effect is poor.
In order to solve the above problems, the present invention provides a control method of a heat pump unit, including the following steps:
After the heat pump unit is started and then stopped at a temperature point, acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit;
calculating the real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃;
When DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
and controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi.
In some embodiments of the present invention, in some embodiments,
The inlet and outlet level average temperature at Average of =0.5× (tout+tin), the inlet and outlet level average temperature at the initial time of the preset time period T is defined as Δt Average of ,0, and the inlet and outlet level average temperature at the end time of the preset time period T is defined as Δt Average of ,t,φ＝(△T Average of ,0-△T Average of ,t)/T.
In some embodiments of the present invention, in some embodiments,
The control of the heat pump unit to operate with the outlet water temperature or the inlet water temperature as a control target according to the magnitude relation of phi comprises the following steps:
When phi is E (0, alpha), controlling the heat pump unit to operate by taking the water inlet temperature as a control target;
when phi is E (alpha, beta), controlling the heat pump unit to operate by taking the control target of the current operation as the control target;
and when phi is E (beta, ++ infinity), controlling the heat pump unit to operate by taking the outlet water temperature as a control target.
In some embodiments of the present invention, in some embodiments,
When the heat pump unit operates by taking the water inlet temperature as a control target, the water inlet temperature control target of the heat pump unit host is the real-time water inlet temperature Tin, set corresponding to the shutdown time of the temperature point; or alternatively
When the heat pump unit runs with the water outlet temperature as a control target, the water outlet temperature control target of the heat pump unit host is the real-time water outlet temperature Tout, set corresponding to the shutdown time of the temperature point of the heat pump unit host or the highest water temperature which can be achieved by the unit.
In some embodiments of the present invention, in some embodiments,
In the running process of the heat pump unit taking the water inlet temperature as a control target, tin, set can be set manually; and/or Tout, set can be set manually during operation of the heat pump unit with the outlet water temperature as a control target.
In some embodiments, after the heat pump unit stops at a temperature point, before calculating the real-time temperature difference Δt of the incoming and outgoing water, the method further comprises:
judging the relation between the shutdown time t0 of the heat pump unit and the preset time length ts,
When t0 is less than ts, controlling the heat pump unit to operate by taking the outlet water temperature as a control target;
when t0 is more than or equal to ts, controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the size relation of phi.
The invention also provides a control device of the heat pump unit, comprising:
the acquisition module is used for acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit after the heat pump unit is started and the heat pump unit is stopped at a temperature point;
the calculation judging module is used for calculating a real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether the delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃;
When DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
and the execution module is used for controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method of a heat pump unit described above.
The invention also provides an air source heat pump unit, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of the control method of the heat pump unit when executing the program.
The invention also provides an air source heat pump unit, which comprises the control device of the heat pump unit.
According to the control method, the device, the storage medium and the air source heat pump unit provided by the invention, after the heat pump unit reaches a temperature point and stops, the heat dissipation end of the heat pump unit and the corresponding heat storage condition of the building enclosure can be judged more truly by detecting the reduction rate phi of the temperature delta T of the heat pump unit in a preset time period, so that the control target of unit operation is actively controlled and regulated according to the acquired actual condition, and the unit is combined with the enclosure structure and the heat dissipation end in an inertia mode, thereby realizing energy-saving operation.
Drawings
FIG. 1 is a schematic diagram of an air source heat pump unit in the prior art;
FIG. 2 is a schematic diagram illustrating steps of a control method of a heat pump unit according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a heat pump unit heat storage performance judging flow according to an embodiment of the invention;
fig. 4 is a schematic diagram of a switching logic of a heat pump unit according to an embodiment of the present invention.
The reference numerals are expressed as:
1. A heat pump unit host; 2. a heat dissipating tip; 3.a host water inlet pipe; 4. a host water outlet pipe; 5. a controller; 6. a water inlet temperature sensor; 7. a water outlet temperature sensor; 8. a first communication line; 9. a second communication line; 10. and (3) a water pump.
Detailed Description
Referring to fig. 1, a heat pump unit commonly used in the prior art, specifically an air source heat pump unit, it includes a heat pump unit host 1 and a heat dissipation terminal 2 that utilize a refrigerant to realize heat supply, the heat dissipation terminal 2 is formed by a host water inlet pipe 3, a host water outlet pipe 4 and a water pump 10 and is circulated, a water inlet temperature sensor 6 capable of detecting water inlet temperature is arranged on the host water inlet pipe 3, a water outlet temperature sensor 7 capable of detecting outlet temperature is arranged on the host water outlet pipe 4, temperature signals detected by the water inlet temperature sensor 6 and the water outlet temperature sensor 7 are fed back to a controller 5 on the heat pump unit host 1 through a first communication line 8 and a second communication line 9 respectively to realize signal acquisition, analysis and control of corresponding components to generate response, and the controller 5 may also be referred to as a control device.
Referring to fig. 1 to 4 in combination, according to an embodiment of the present invention, there is provided a control method of a heat pump unit, including the steps of:
s11, after the heat pump unit is started and stops at a temperature point, acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit;
S12, calculating a real-time temperature difference DeltaT= (Tout-Tin) of water inlet and outlet, and judging whether DeltaT is not more than a preset temperature difference Tp, wherein Tp is more than 0 ℃; when DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
S13, controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi.
According to the technical scheme, after the heat pump unit reaches a temperature point and stops, the heat dissipation tail end 2 of the heat pump unit and the corresponding heat storage condition of the building enclosure can be judged more truly by detecting the reduction rate phi of the temperature delta T of the inlet and outlet levels of the heat pump unit within the preset time period, so that the control target for regulating the operation of the unit is actively controlled according to the obtained actual condition, and the unit is combined with the enclosure structure and the heat dissipation tail end in an inertia mode, so that the energy-saving operation is realized. It should be noted that, the detection of the average inlet and outlet water temperature Δt is performed after the machine set reaches the temperature point and is stopped, so as to reduce the influence of the waste heat of the machine set refrigerant on the Δt, ensure the accuracy of subsequent control, and reasonably select specific interval time according to actual requirements, based on the waste heat of the machine set refrigerant.
After the heat pump unit host 1 is stopped, the water pump 10 is continuously turned on, and water (i.e. the aforesaid refrigerating medium) in the system continuously circulates, but the temperature difference Δt of water entering and exiting in the water system gradually decreases and tends to 0 due to the absence of the heat provided by the heat pump unit host 1, specifically, the temperature average temperature Δt Average of =0.5 (tout+tin) at the initial time of the preset time period T is defined as Δt Average of ,0, the temperature average at the end time of the preset time period T is defined as Δt Average of ,t,φ＝(△T Average of ,0-△T Average of ,t)/T, and the preset time period T is 2 minutes in one embodiment. It should be noted that, the speed of the drop of the average water temperature is adopted as a judgment reference instead of selecting the drop of the single water inlet or outlet temperature, so that the thermal inertia of the building where the heat dissipation end 2 is located can be reflected more accurately, the control of the subsequent unit is more optimized and reasonable, especially when the heat dissipation end 2 is a ground heating end or the like and has a larger heat dissipation flow path, the judgment control is more reasonable, and of course, the heat dissipation end 2 can also be a fan coil, a radiator end or the like, or a heat exchanger using water as a circulation medium such as a radiation coil or the like. The water storage capacity in the system is relatively large at the tail end of the floor heating and the tail end of the radiator, so that the heat storage capacity is relatively high, and when the heat pump unit host machine 1 is stopped, the water system still can emit more heat; the water storage capacity in the fan coil is smaller, so that the heat storage capacity is relatively smaller, and the heat dissipated by the water system is smaller when the heat pump unit host 1 is stopped.
Specifically, the control of the heat pump unit to operate with the outlet water temperature or the inlet water temperature as a control target according to the magnitude relation of phi comprises the following steps:
When phi is E (0, alpha) (namely, the section A in figure 3), the heat pump unit is controlled to operate by taking the water inlet temperature as a control target, the average value reduction rate of the water inlet temperature and the water outlet temperature is very low, which indicates that the building enclosure structure is good, the tail end heat storage capacity is strong, or the indoor load demand is relatively low, so that the energy-saving operation is better realized, the control target of the heat pump unit host 1 is switched to the water inlet temperature or kept at the water inlet temperature;
When phi is epsilon (alpha, beta) (namely, the section B in fig. 3), the control heat pump unit is controlled to operate by taking the control target of the current operation as the control target, namely, the average value reduction rate of the water inlet and outlet temperature is in a normal state, and the control target of the heat pump unit host 1 is not switched;
When phi epsilon (beta, ++) is the range C in figure 3, the heat pump unit is controlled to run by taking the water outlet temperature as a control target, the average value of the water outlet temperature is reduced at a higher speed, which indicates that the heat storage performance of the building and the tail end is weaker or the indoor load requirement is higher, in order to ensure better heating effect, in this case, in a specific embodiment, if the control target of the heat pump unit host 1 is the outlet water temperature, tout, set is a set value of the user, so that the unit operation can more meet the requirement of the user; if the control target of the heat pump host 1 is the water inlet temperature, tout, set is the water outlet temperature or the highest water temperature that can be reached when the heat pump host 1 is stopped, if the water outlet temperature is higher than the highest water temperature that can be reached when the unit is stopped, the unit is operated according to the highest water temperature (excluding the protective stop of the unit caused by the overhigh water temperature). It will be appreciated that α < β, in one specific example α is 1 and β is 2, and in other embodiments may be a value preset by the manufacturer.
After the heat pump unit stops at a temperature point, the method further comprises the following steps of:
Judging the relation between the downtime t0 of the heat pump unit and the preset time length ts, and controlling the heat pump unit to run by taking the water outlet temperature as a control target when t0 is less than ts; when t0 is more than or equal to ts, the corresponding step of controlling the heat pump unit to run by taking the water outlet temperature or the water inlet temperature as a control target according to the size relation of phi is carried out, so that the heat demand of the space where the user is can be rapidly judged through the starting and stopping frequency of the heat pump unit host 1, and further, larger heat can be provided more timely. The ts may be 15 minutes, or may be a predetermined time period of other manufacturers.
It can be understood that there are two situations of starting up the heat pump unit host 1, one is an initial starting up from shutdown to startup, and one is a standby starting up state from standby to startup, and the on-off logic of the heat pump unit of the present invention is shown in fig. 4. In general, in order to meet the demands of users more quickly, the unit control target defaults to the water outlet temperature when the machine is started initially.
According to an embodiment of the present invention, there is provided a heat pump unit control apparatus including:
the acquisition module is used for acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit after the heat pump unit is started and the heat pump unit is stopped at a temperature point;
The calculation judging module is used for calculating a real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether the delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃; when DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
and the execution module is used for controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi.
According to the technical scheme, after the heat pump unit reaches a temperature point and stops, the heat dissipation tail end 2 of the heat pump unit and the corresponding heat storage condition of the building enclosure can be judged more truly by detecting the reduction rate phi of the temperature delta T of the inlet and outlet levels of the heat pump unit within the preset time period, so that the control target for regulating the operation of the unit is actively controlled according to the obtained actual condition, and the unit is combined with the enclosure structure and the heat dissipation tail end in an inertia mode, so that the energy-saving operation is realized. It should be noted that, the detection of the average inlet and outlet water temperature Δt is performed after the machine set reaches the temperature point and is stopped, so as to reduce the influence of the waste heat of the machine set refrigerant on the Δt, ensure the accuracy of subsequent control, and reasonably select specific interval time according to actual requirements, based on the waste heat of the machine set refrigerant.
After the heat pump unit host 1 is stopped, the water pump 10 is continuously started, water (i.e. the aforesaid secondary refrigerant) in the system continuously circulates, but the temperature difference Δt of water entering and exiting in the water system gradually decreases and tends to 0 due to the absence of heat provided by the heat pump unit host 1, specifically, the temperature average temperature Δt Average of =0.5 (tout+tin) of water entering and exiting at the initial time of the preset time period T is defined as Δt Average of ,0, and the temperature average temperature of water entering and exiting at the end time of the preset time period T is defined as Δt Average of ,t,φ＝(△T Average of ,0-△T Average of ,t)/T. It should be noted that, the speed of the drop of the average water temperature is adopted as a judgment reference instead of selecting the drop of the single water inlet or outlet temperature, so that the thermal inertia of the building where the heat dissipation end 2 is located can be reflected more accurately, the control of the subsequent unit is more optimized and reasonable, especially when the heat dissipation end 2 is a ground heating end or the like and has a larger heat dissipation flow path, the judgment control is more reasonable, and of course, the heat dissipation end 2 can also be a fan coil, a radiator end or the like, or a heat exchanger using water as a circulation medium such as a radiation coil or the like. The water storage capacity in the system is relatively large at the tail end of the floor heating and the tail end of the radiator, so that the heat storage capacity is relatively high, and when the heat pump unit host machine 1 is stopped, the water system still can emit more heat; the water storage capacity in the fan coil is smaller, so that the heat storage capacity is relatively smaller, and the heat dissipated by the water system is smaller when the heat pump unit host 1 is stopped.
The execution module is also to: when phi is E (0, alpha) (namely, the section A in figure 3), the heat pump unit is controlled to operate by taking the water inlet temperature as a control target, the average value reduction rate of the water inlet temperature and the water outlet temperature is very low, which indicates that the building enclosure structure is good, the tail end heat storage capacity is strong, or the indoor load demand is relatively low, so that the energy-saving operation is better realized, the control target of the heat pump unit host 1 is switched to the water inlet temperature or kept at the water inlet temperature;
When phi is epsilon (alpha, beta) (namely, the section B in fig. 3), the control heat pump unit is controlled to operate by taking the control target of the current operation as the control target, namely, the average value reduction rate of the water inlet and outlet temperature is in a normal state, and the control target of the heat pump unit host 1 is not switched;
When phi epsilon (beta, ++) is the range C in figure 3, the heat pump unit is controlled to run by taking the water outlet temperature as a control target, the average value of the water outlet temperature is reduced at a higher speed, which indicates that the heat storage performance of the building and the tail end is weaker or the indoor load requirement is higher, in order to ensure better heating effect, in this case, in a specific embodiment, if the control target of the heat pump unit host 1 is the outlet water temperature, tout, set is a set value of the user, so that the unit operation can more meet the requirement of the user; if the control target of the heat pump host 1 is the water inlet temperature, tout, set is the water outlet temperature or the highest water temperature that can be reached when the heat pump host 1 is stopped, if the water outlet temperature is higher than the highest water temperature that can be reached when the unit is stopped, the unit is operated according to the highest water temperature (excluding the protective stop of the unit caused by the overhigh water temperature). It can be appreciated that α < β.
The acquisition module is also used for calculating the real-time temperature difference delta T of water inlet and outlet after the heat pump unit stops at a temperature point, and comprises the following steps:
judging the relation between the downtime t0 of the heat pump unit and the preset time length ts, and controlling the heat pump unit to run by taking the water outlet temperature as a control target when t0 is less than ts; the execution module is further used for transferring to a corresponding step of controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the magnitude relation of phi when t0 is more than or equal to ts, so that the heat demand of the space where the user is located can be rapidly judged through the magnitude of the start-stop frequency of the heat pump unit host 1, and further, larger heat can be provided more timely.
It can be understood that there are two situations of starting up the heat pump unit host 1, one is an initial starting up from shutdown to startup, and one is a standby starting up state from standby to startup, and the on-off logic of the heat pump unit of the present invention is shown in fig. 4. In general, in order to meet the demands of users more quickly, the unit control target defaults to the water outlet temperature when the machine is started initially.
According to an embodiment of the present invention, there is also provided a storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the control method of a heat pump unit described above.
According to an embodiment of the present invention, there is also provided an air-source heat pump unit including a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of the control method of the heat pump unit when executing the program.
According to an embodiment of the present invention, there is also provided an air source heat pump unit including a control device of the heat pump unit as described above.
Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. The control method of the heat pump unit is characterized by comprising the following steps:
After the heat pump unit is started and then stopped at a temperature point, acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit;
Calculating the real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃;
When DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
Controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi;
the control of the heat pump unit to operate with the outlet water temperature or the inlet water temperature as a control target according to the magnitude relation of phi comprises the following steps:
When phi is E (0, alpha), controlling the heat pump unit to operate by taking the water inlet temperature as a control target;
When phi is E (alpha, beta), controlling the heat pump unit to operate by taking the control target of the current operation as the control target;
And when phi is E (beta, ++ infinity), controlling the heat pump unit to operate by taking the outlet water temperature as a control target.
2. The control method according to claim 1, wherein,
The inlet and outlet level average temperature at Average of =0.5× (tout+tin), the inlet and outlet level average temperature at the initial time of the preset time period T is defined as Δt Average of ,0, and the inlet and outlet level average temperature at the end time of the preset time period T is defined as Δt Average of ,t,φ= (△T Average of ,0-△T Average of ,t)/T.
3. The control method according to claim 1, wherein,
When the heat pump unit operates by taking the water inlet temperature as a control target, the water inlet temperature control target of the heat pump unit host (1) is the real-time water inlet temperature Tin, set corresponding to the stop time of the temperature point; or alternatively
When the heat pump unit runs with the water outlet temperature as a control target, the water outlet temperature control target of the heat pump unit host (1) is the real-time water outlet temperature Tout, set corresponding to the stop time of the temperature point or the highest water temperature which can be reached by the unit.
4. The control method according to claim 3, wherein,
In the running process of the heat pump unit taking the water inlet temperature as a control target, tin, set can be set manually; and/or Tout, set can be set manually during operation of the heat pump unit with the outlet water temperature as a control target.
5. The control method according to claim 1, characterized by further comprising, after the heat pump unit has reached a stop at a temperature point, before calculating the real-time temperature difference Δt of the incoming and outgoing water:
judging the relation between the shutdown time t0 of the heat pump unit and the preset time length ts,
When t0 is less than ts, controlling the heat pump unit to operate by taking the outlet water temperature as a control target;
when t0 is more than or equal to ts, controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the size relation of phi.
6. A control device for a heat pump unit, comprising:
the acquisition module is used for acquiring the real-time water outlet temperature Tout and the real-time water inlet temperature Tin of the heat pump unit after the heat pump unit is started and the heat pump unit is stopped at a temperature point;
the calculation judging module is used for calculating a real-time temperature difference delta T= (Tout-Tin) of the water inlet and outlet, and judging whether the delta T is not more than a preset temperature difference Tp or not, wherein Tp is more than 0 ℃;
When DeltaT is less than or equal to Tp, calculating and obtaining the decreasing rate phi of the inlet and outlet level average temperature DeltaT Average of in the preset time period T;
The execution module is used for controlling the heat pump unit to operate with the water outlet temperature or the water inlet temperature as a control target according to the relation of phi;
the control of the heat pump unit to operate with the outlet water temperature or the inlet water temperature as a control target according to the magnitude relation of phi comprises the following steps:
When phi is E (0, alpha), controlling the heat pump unit to operate by taking the water inlet temperature as a control target;
When phi is E (alpha, beta), controlling the heat pump unit to operate by taking the control target of the current operation as the control target;
And when phi is E (beta, ++ infinity), controlling the heat pump unit to operate by taking the outlet water temperature as a control target.
7. A storage medium having stored thereon a computer program which when executed by a processor realizes the steps of the control method of a heat pump unit according to any of claims 1-5.
8. An air source heat pump unit comprising a processor, a memory and a computer program stored on the memory and operable on the processor, the processor executing the program to perform the steps of the method of controlling a heat pump unit according to any one of claims 1 to 5.
9. An air source heat pump assembly comprising the control device of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565885.0A CN115751666B (en) | 2022-12-07 | 2022-12-07 | Control method and device of heat pump unit, storage medium and air source heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565885.0A CN115751666B (en) | 2022-12-07 | 2022-12-07 | Control method and device of heat pump unit, storage medium and air source heat pump unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115751666A CN115751666A (en) | 2023-03-07 |
| CN115751666B true CN115751666B (en) | 2024-07-09 |
Family
ID=85344208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211565885.0A Active CN115751666B (en) | 2022-12-07 | 2022-12-07 | Control method and device of heat pump unit, storage medium and air source heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115751666B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238174A (en) * | 2017-05-27 | 2017-10-10 | 珠海格力电器股份有限公司 | Method and device for controlling frequency of compressor |
| CN112728820A (en) * | 2020-12-31 | 2021-04-30 | 新奥数能科技有限公司 | Water chilling unit and start-stop control method and device thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044745A (en) * | 1983-08-19 | 1985-03-09 | Matsushita Electric Ind Co Ltd | Air conditioning device |
| JP5204987B2 (en) * | 2007-04-11 | 2013-06-05 | 高砂熱学工業株式会社 | Air conditioning system and control method of air conditioning system |
| CN102705960B (en) * | 2012-07-04 | 2014-09-10 | 江苏劳特斯机电设备工程有限公司 | Intelligent energy output control method for compressor of water source heat pump machine set |
| CN104728979B (en) * | 2015-03-27 | 2017-04-05 | 黄国和 | A kind of Renovation of air-conditioning system method and apparatus of application all-weather solar heat supply |
| CN104764170B (en) * | 2015-04-24 | 2018-09-18 | 珠海格力电器股份有限公司 | Heat pump start-stop control method and device and air conditioner |
| CA2973023A1 (en) * | 2016-07-12 | 2018-01-12 | Basx Solutions, Llc | Hybrid dry air cooling system |
| CN106482292B (en) * | 2016-09-18 | 2018-12-25 | 珠海格力电器股份有限公司 | Control method, system and device of cold and hot water unit and air conditioner |
| CN106989477B (en) * | 2016-11-11 | 2019-06-04 | 深圳达实智能股份有限公司 | Control method, control device and the central air conditioner system of refrigerating water pump after cold is shut down |
| CN112178860B (en) * | 2020-09-28 | 2022-05-03 | 广东Tcl智能暖通设备有限公司 | Operation control method of air-cooled cold and hot water unit and air conditioner |
-
2022
- 2022-12-07 CN CN202211565885.0A patent/CN115751666B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238174A (en) * | 2017-05-27 | 2017-10-10 | 珠海格力电器股份有限公司 | Method and device for controlling frequency of compressor |
| CN112728820A (en) * | 2020-12-31 | 2021-04-30 | 新奥数能科技有限公司 | Water chilling unit and start-stop control method and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115751666A (en) | 2023-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2639405C (en) | Air conditioning system for low ambient cooling | |
| US20120291984A1 (en) | Kind Of Air Conditioner System And Control Method Of Its Condensing Fan | |
| CN108826585B (en) | Control method and device of air conditioner, storage medium and air conditioner | |
| CN110440412A (en) | A kind of control method, control system and the air conditioner of compressor heat tape | |
| CN115095955A (en) | Air conditioner and defrosting control method thereof | |
| CN114466577B (en) | Multifunctional data machine room acquisition and control method and equipment | |
| CN115751666B (en) | Control method and device of heat pump unit, storage medium and air source heat pump unit | |
| CN113864914B (en) | Heating control method and device, air conditioner and storage medium | |
| CN113701326A (en) | Outdoor fan speed regulation control device and system for heat pump | |
| CN110017580B (en) | Fan coil and cold and heat source equipment mode interlocking control method and device and air conditioner | |
| JP4950725B2 (en) | Air conditioning control system | |
| CN114811773B (en) | Air conditioner, control method of air conditioner and computer readable storage medium | |
| CN111474971B (en) | Control method for preventing excessive low water flow and water supply machine | |
| CN109506332B (en) | Air speed control method and device of air conditioning system and electronic equipment | |
| WO2018105732A1 (en) | Heat medium circulation system and coolant circulation system | |
| CN115900007B (en) | Temperature-adjusting and dehumidifying method and device for rack-mounted air conditioner | |
| JP2008241231A (en) | Energy-saving air-conditioning control system | |
| CN109556225B (en) | Control method for refrigerating capacity of cooling system and cooling system | |
| CN112393391B (en) | Heat storage control method for air conditioner | |
| CN114608182B (en) | Cooling tower control method and control system | |
| CN103712308A (en) | Air conditioner capacity regulating and controlling method and system | |
| CN115164635B (en) | Closed cooling tower fan control method and system | |
| WO2024001320A1 (en) | Air conditioner and defrosting control method therefor | |
| CN117824109A (en) | Control method of environment adjustment device, and storage medium | |
| CN117824099A (en) | Control method of environment adjustment device, and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |