CN106765499B - Flow path system of heat pump unit, heat pump unit and control method of heat pump unit - Google Patents
Flow path system of heat pump unit, heat pump unit and control method of heat pump unit Download PDFInfo
- Publication number
- CN106765499B CN106765499B CN201611151454.4A CN201611151454A CN106765499B CN 106765499 B CN106765499 B CN 106765499B CN 201611151454 A CN201611151454 A CN 201611151454A CN 106765499 B CN106765499 B CN 106765499B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic valve
- heat
- heat storage
- storage device
- flow path
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a flow path system of a heat pump unit, the heat pump unit and a control method thereof, wherein the flow path system comprises a refrigerant loop formed by an outer unit and a heat exchange element, a heating loop formed by a water pump and the heat exchange element which are connected in series, and also comprises a heat storage loop formed by a heat storage device which is connected in parallel with the heat exchange element and the outer unit which are connected in series, a first electromagnetic valve for controlling the opening and closing of the loop is arranged on the heat storage loop, the heating loop comprises a heating branch which penetrates through the heat storage device, a second electromagnetic valve for controlling the opening and closing of the heating branch is arranged on the heating branch, the flow path system also comprises a controller which is connected with the first electromagnetic valve and the second electromagnetic valve, the heat storage device is subjected to heat storage by controlling the opening of the first electromagnetic valve, the running time of the outer unit is prolonged, the second electromagnetic valve is controlled to open, the frequency of the outdoor unit starting and stopping at a warm temperature is reduced, and the stability of the water supply temperature is ensured.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a flow path system of a heat pump unit, the heat pump unit and a control method thereof.
Background
Along with the continuous improvement of consciousness of improving the quality of life of people, more and more people can select a floor heating mode to heat in winter. For a constant-speed air-cooled cold-hot water heat pump unit, when the unit works under a small load (such as the outdoor environment temperature of about 10 ℃), the outlet water temperature can quickly reach a preset value, and a compressor is continuously started and stopped, so that the water supply temperature fluctuation is large, and the indoor temperature cannot reach a comfortable temperature for a long time.
Disclosure of Invention
The invention mainly aims to provide a flow path system of a heat pump unit, and aims to solve the technical problem that the fluctuation of the water supply temperature is large due to frequent start and stop of a constant-speed air-cooling cold and hot water heat pump unit under a small-load working condition.
In order to achieve the purpose, the invention provides a flow path system of a heat pump unit, which comprises a refrigerant loop formed by serially connecting an external machine and a heat exchange element and a heating loop formed by serially connecting a water pump and the heat exchange element,
the flow path system also comprises at least one heat storage device which is arranged in parallel with the heat exchange element, each heat storage device is connected with the external unit in series to form a heat storage loop, each heat storage loop comprises an inlet end and a first electromagnetic valve, and the first electromagnetic valve is arranged on a pipeline between the inlet end and the heat storage device;
the heating loop comprises at least one heating branch, each heating branch penetrates through a heat storage device, each heating branch comprises an inlet end and a second electromagnetic valve, and the second electromagnetic valve is arranged on a pipeline between the inlet end and the heat storage device;
the flow path system further comprises a controller, wherein the controller is connected with each first electromagnetic valve and each second electromagnetic valve, controls the first electromagnetic valves to be opened to store heat or close the heat storage device, controls the second electromagnetic valves to be opened to release heat or close the heat storage device, and adjusts the starting and stopping frequency of the external unit.
Further, the flow path system also comprises a detection module, and when the detection module detects that the external machine stops when the running time is less than the preset value for at least two times, the water supply temperature reaches the highest set value, the controller is started.
Furthermore, each heat storage device is filled with a phase change material.
Further, the flow path system comprises a heat storage device, and the controller is respectively connected with a first electromagnetic valve on the heat storage loop and a second electromagnetic valve on the heating branch.
Further, when T is detected to be [0, TS－Tn1) During the interval, controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed;
when T ═ T is detectedS－Tn1When the first electromagnetic valve is opened, the first electromagnetic valve is controlled to be opened;
when T ═ T is detectedSWhen the first electromagnetic valve is closed, the second electromagnetic valve is opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn1＜TST is in [0, TS]In the interval, the heat output by the external machine in unit time is larger than the sum of the load and the heat absorbed by the heat storage device.
Further, when T is detected to be [0, TS－Tn1) During the interval, controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed;
when T ═ T is detectedS－Tn1When the first electromagnetic valve is opened, the first electromagnetic valve is controlled to be opened;
when the heat storage device is detected not to absorb heat any more, closing the first electromagnetic valve;
when T ═ T is detectedSWhen the second electromagnetic valve is opened, the outer machine stops and controls the second electromagnetic valve to be opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn1＜TS。
Further, when T is detected to be [0, TS－Tn1) During the interval, controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed;
when T ═ T is detectedS－Tn1When the first electromagnetic valve is opened, the first electromagnetic valve is controlled to be opened;
when T ═ T is detectedS－Tn2When the first electromagnetic valve is closed, the first electromagnetic valve is controlled to be closed;
when T ═ T is detectedSWhen the second electromagnetic valve is opened, the outer machine stops and controls the second electromagnetic valve to be opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn2＜TS－Tn1＜TS，
T is at the slave TS－Tn1Down to TS－Tn2During the period, the heat output by the external unit in unit time is less than the sum of the load and the heat absorbed by the heat storage device.
The invention also provides a heat pump unit, which comprises the flow path system of the heat pump unit.
Another object of the present invention is to provide a control method for a heat pump unit as described above, which includes the following steps:
when the external machine is detected to be stopped when the water supply temperature reaches the highest set value when the running time is less than the preset value for at least two times, the following control logics are operated:
controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed before the water supply temperature reaches a preset temperature;
when the water supply temperature is detected to reach the preset temperature, the first electromagnetic valve is opened to convey heat to the heat storage device;
and when the water supply temperature is detected to reach the highest set temperature, the first electromagnetic valve is closed, the second electromagnetic valve is opened to release heat from the heat storage device, and the second electromagnetic valve is closed until the external unit operates again.
Further, when detecting that the water supply temperature reaches the preset temperature, open first solenoid valve is to the step of heat storage device delivery heat, specifically includes:
when the heat storage device is detected not to absorb heat any more, controlling the first electromagnetic valve to be closed;
and when the supplied water temperature is detected to be reduced to a preset value, the output heat of the external machine in unit time is smaller than the sum of the load and the heat absorbed by the heat storage device, and the first electromagnetic valve is closed.
The flow path system of the heat pump unit comprises a refrigerant loop formed by serially connecting an external machine and a heat exchange element, a heating loop formed by serially connecting a water pump and the heat exchange element, and at least one heat storage device arranged in parallel with the heat exchange element, wherein each heat storage device is respectively serially connected with the external machine to form the heat storage loop, a first electromagnetic valve for controlling the opening and closing of the loop is arranged on the heat storage loop, the heating loop comprises at least one heating branch, each heating branch penetrates through one heat storage device, a second electromagnetic valve for controlling the opening and closing of the heating branch is arranged on the heating branch, the flow path system also comprises a controller connected with the first electromagnetic valve and the second electromagnetic valve, the heat storage device is subjected to heat storage by controlling the opening of the first electromagnetic valve, the running time of the external machine is prolonged, and the second electromagnetic valve is controlled to open to release heat from the heat storage device after, the time interval for the external unit to be opened again is prolonged, the frequency of the external unit to be started and stopped at a warm temperature is reduced, and the stability of the water supply temperature is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a flow path system of a heat pump unit according to an embodiment of the present invention;
FIG. 2 is a control logic diagram of the flow system of FIG. 1;
FIG. 3 is a flowchart illustrating a method for controlling a heat pump unit according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
60 | Heating loop |
| 20 | |
70 | Heat storage loop |
| 30 | Heat storage device | 71 | First |
| 40 | Water pump | 80 | Heating branch |
| 50 | |
81 | Second electromagnetic valve |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a flow path system of a heat pump unit.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a flow path system of a heat pump unit of the present invention.
In this embodiment, the flow path system of the heat pump unit includes a refrigerant circuit 50 in which the outdoor unit 10 and the heat exchange element 20 are connected in series, and a heating circuit 60 in which the water pump 40 and the heat exchange element 20 are connected in series,
the flow path system further comprises at least one heat storage device 30 connected in parallel with the heat exchange element 20, each heat storage device 30 is connected in series with the external unit 10 to form a heat storage loop 70, each heat storage loop 70 comprises an inlet end (not shown) and a first electromagnetic valve 71, and the first electromagnetic valve 71 is arranged on a pipeline between the inlet end and the heat storage device 30;
the heating loop 60 includes at least one heating branch 80, each heating branch 80 penetrates through one heat storage device 30, each heating branch 80 includes an inlet end (not shown) and a second solenoid valve 81, and the second solenoid valve 81 is disposed in a pipeline between the inlet end and the heat storage device 30;
the flow path system further comprises a controller (not shown), the controller is connected with each of the first electromagnetic valve 71 and the second electromagnetic valve 81, the first electromagnetic valve 71 is controlled to be opened to store heat in the heat storage device 30 or closed, the second electromagnetic valve 81 is controlled to be opened to release heat from the heat storage device 30 or closed, and the starting and stopping frequency of the external unit 10 is adjusted.
In this embodiment, the flow path system of the heat pump unit includes a cooling medium loop 50 and a heating loop 60, the cooling medium loop 50 is formed by connecting an external unit 10 and a heat exchange element 20 in series, the heating loop 60 is formed by connecting the heat exchange element 20 and a water pump 40 in series, when the heat pump unit works, a high-temperature and high-pressure gaseous cooling medium generated by the external unit 10 is conveyed to the heat exchange element 20, meanwhile, a liquid water body output from the water pump also enters the heat exchange element 20 to exchange heat with the high-temperature and high-pressure gaseous cooling medium, the temperature rises after absorbing heat carried by the high-temperature and high-pressure gaseous cooling medium, and the heat in the heat exchange element 20 is absorbed continuously in the.
Furthermore, the flow path system of the heat pump unit is further provided with at least one heat storage device 30, phase change materials capable of absorbing and releasing heat are filled in the heat storage devices 30, the heat storage devices 30 are arranged in parallel with the heat exchange element 20, each heat storage device 30 is connected with the outer unit 10 in series to form a heat storage loop 70, namely, redundant heat carried by high-temperature and high-pressure gaseous refrigerant output by the outer unit 10 is transmitted to the heat storage devices 30 for absorption and storage, each heat storage loop 70 further comprises an inlet end and a first electromagnetic valve 71 for controlling the connection and disconnection of the heat storage loop 70, the first electromagnetic valve 71 is arranged on a pipeline between the inlet end and the heat storage devices 30, and the first electromagnetic valve 71 can also adjust the flow rate of the high-temperature and high-pressure gaseous refrigerant entering the heat storage loop 70 by adjusting the opening degree.
Further, the heating loop 60 further includes at least one heating branch 80 connected in parallel with the heating loop, each heating branch 80 penetrates through one heat storage device 30, each heating branch 80 includes an inlet end connected to the main pipeline of the heating loop 60, and a second electromagnetic valve 81 controlling the connection and disconnection of the heating branch 80, the second electromagnetic valve 81 is disposed on the pipeline between the inlet end and the heat storage device 30, and the second electromagnetic valve 81 can also adjust the flow rate of the water to be heated entering the heating branch 80 by adjusting the opening degree.
Further, a controller is arranged in the flow path system of the heat pump unit, and the controller is connected with the first electromagnetic valve 71 in each heat storage loop 70 and the second electromagnetic valve 81 in each heating branch 80 to control the first electromagnetic valve 71 in each heat storage loop 70 to open and convey high-temperature and high-pressure gaseous refrigerant to the heat storage device 30, the phase-change material in the heat storage device 30 absorbs heat carried by the high-temperature and high-pressure gaseous refrigerant to store heat, the time that the supply water temperature reaches the highest set temperature is delayed, the running time of the external unit 10 is further prolonged, after the external unit 10 is stopped at a temperature, the second electromagnetic valve 81 on the heating branch 80 is controlled to open and release heat through the phase-change material in the heat storage device 30, the water in the heating branch 80 passing through the heat storage device 30 is heated, the time that the supply water temperature is reduced is delayed, and the time that the external unit 10 is opened again, thereby adjusting the frequency of turning on and off the outer unit 10 in the heating cycle.
The flow path system of the heat pump unit comprises a refrigerant loop 50 formed by serially connecting an outer unit 10 and a heat exchange element 20, a heating loop 60 formed by serially connecting a water pump 40 and the heat exchange element 20, and at least one heat storage device 30 arranged in parallel with the heat exchange element 20, wherein each heat storage device 30 is respectively serially connected with the outer unit 10 to form a heat storage loop 70, a first electromagnetic valve 71 for controlling the opening and closing of the loop is arranged on the heat storage loop 70, the heating loop 60 comprises at least one heating branch 80, each heating branch 80 penetrates through one heat storage device 30, a second electromagnetic valve 81 for controlling the opening and closing of the heating branch 80 is arranged on the heating branch 80, the flow path system further comprises a controller connected with the first electromagnetic valve 71 and the second electromagnetic valve 81, the heat storage devices 30 are subjected to heat storage by controlling the opening of the first electromagnetic valve 71, and the running time of the outer unit 10 is prolonged, after the outdoor unit 10 stops, the second electromagnetic valve 81 is controlled to be opened to release heat from the heat storage device 30, so that the time interval between the re-opening of the outdoor unit 10 is prolonged, the frequency of the warm start and stop of the outdoor unit 10 is reduced, and the stability of water supply and water temperature is ensured.
Further, the flow path system further includes a detection module (not shown) for detecting that the external unit 10 is stopped when the operation time is less than a preset value to reach a maximum set value of the water supply temperature at least twice, and starting a controller (not shown).
In this embodiment, the flow path system of the heat pump unit further includes a detection module for detecting the temperature of the supplied water, where the detection module may be a temperature sensor or an electronic thermometer connected to the electronic control system, so that when the operation time of the external unit 10 is detected to be less than the preset value at least twice continuously, the supplied water temperature reaches the highest set value and stops, the controller is started to enter the control logic, and the operation process of the next cycle of the external unit 10 is adjusted.
Further, referring to fig. 1, in the present embodiment, the flow path system includes a heat storage device 30, and the controller is connected to a first solenoid valve 71 on the heat storage circuit 70 and a second solenoid valve 81 on the heating branch 80, respectively.
In this embodiment, the flow path system of the heat pump unit includes only one heat storage device 30, in other embodiments, the number of the heat storage devices 30 may be set according to the output capacity and the heating load of the external unit 10, and the controller is connected to the first electromagnetic valve 71 on the heat storage loop 70 and the second electromagnetic valve 81 on the heating branch 80 respectively to control the first electromagnetic valve 71 to open to store heat in the heat storage device 30, so as to prolong the running time of the external unit 10, and after the external unit 10 is stopped, control the second electromagnetic valve 81 to open to release heat from the heat storage device 30, so as to prolong the interval time between the external unit 10 being opened again, reduce the frequency of the external unit 10 being started and stopped at a temperature, and ensure the stability of the water.
Further, referring to FIGS. 1 and 2, when T is detected to be [0, TS－Tn1) During the interval, the first electromagnetic valve 71 and the second electromagnetic valve 81 are controlled to be kept closed;
when T ═ T is detectedS－Tn1Then, the first electromagnetic valve 71 is controlled to be opened;
when T ═ T is detectedSWhen the outdoor unit 10 stops, the first electromagnetic valve 71 is closed, and the second electromagnetic valve 81 is opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn1＜TST is in [0, TS]In the interval, the heat output by the external machine in unit time is larger than the sum of the load and the heat absorbed by the heat storage device.
In this embodiment, the external unit 10 enters the control logic as shown in fig. 2 when being turned on, the detection module detects the water supply temperature T, and the water supply temperature T does not reach the first preset temperature TS－Tn1Before, the controller controls the first electromagnetic valve 71 and the second electromagnetic valve 81 to be kept in a closed state, and at this time, the high-temperature and high-pressure gaseous refrigerant generated by the external unit 10 is mainly used for heating the water to be heated in the heating loop 60, so that the water in the heating loop 60 reaches the first preset temperature value T at the fastest speedS－Tn1At the water supply temperature T reaching TS－Tn1In the meantime, in order to extend the operation time of the external unit 10, the first electromagnetic valve 71 is controlled to be opened, so that part of the high-temperature and high-pressure gaseous refrigerant is delivered to the heat storage device 30 through the heat storage circuit 70, the phase change material in the heat storage device 30 absorbs the heat carried by the high-temperature and high-pressure gaseous refrigerant, and the heat output by the external unit 10 in unit time is greater than the heating load and the heat absorbed by the heat storage device 30, so that the supply water temperature T rises with the operation of the external unit 10 even after the first electromagnetic valve 71 is opened until the maximum set temperature T is reachedSI.e. in (T)S－Tn1，TS) In the interval, when the heat storage device 30 stores the heat amount in advance, the first solenoid valve 71 is closed in advance, the second solenoid valve 81 is kept in a closed state, and the highest water supply temperature T is detectedConstant temperature TSWhen the outdoor unit 10 is automatically stopped, the controller controls the first electromagnetic valve 71 to be closed and the second electromagnetic valve 81 to be opened, heat is released through the heat storage device 30 at the moment, water in the heating branch 80 is circularly heated, the falling speed of the water supply temperature T is delayed, and the time interval of the next opening of the outdoor unit 10 is further prolonged, wherein T is more than 0 and less than T in the embodimentS－Tn1＜TSAnd the heat output by the outdoor unit 10 per unit time is larger than the heat absorbed by the heating load and the heat storage device 30.
Further, referring to FIGS. 1 and 2, when T is detected to be [0, TS－Tn1) During the interval, the first electromagnetic valve 71 and the second electromagnetic valve 81 are controlled to be kept closed;
when T ═ T is detectedS－Tn1Then, the first electromagnetic valve 71 is controlled to be opened;
when it is detected that the heat storage device 30 no longer absorbs heat, the first electromagnetic valve 71 is controlled to close;
when T ═ T is detectedSWhen the outdoor unit 10 stops, the second electromagnetic valve 81 is controlled to be opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn1＜TS。
In this embodiment, the external unit 10 enters the control logic as shown in fig. 2 when being turned on, and the detection module detects the water supply temperature T, and the water supply temperature T does not reach the first preset temperature TS－Tn1Before, the controller controls the first electromagnetic valve 71 and the second electromagnetic valve 81 to be kept in a closed state, and at this time, the high-temperature and high-pressure gaseous refrigerant generated by the external unit 10 is mainly used for heating the water to be heated in the heating loop 60, so that the water in the heating loop 60 reaches the first preset temperature value T at the fastest speedS－Tn1At the water supply temperature T reaching TS－Tn1In order to prolong the operation time of the external unit 10, the first electromagnetic valve 71 is controlled to open, so that part of the high-temperature high-pressure gaseous refrigerant is delivered to the heat storage device 30 through the heat storage loop 70, and the phase change material in the heat storage device 30 absorbs the heat carried by the high-temperature high-pressure gaseous refrigerant due to unit timeThe heat output from the outdoor unit 10 is greater than the heat absorbed by the heating load and the heat storage unit 30, so that the supply water temperature T rises with the operation of the outdoor unit 10 even after the first solenoid valve 71 is opened until another temperature T is reachedS－Tn3At this time, if the output heat of the outdoor unit 10 is completely absorbed by the heating load and the heat storage device 30 per unit time, the feed water temperature T is maintained at TS－Tn3In order to ensure efficient operation of the outer unit 10, the first electromagnetic valve 71 is controlled to be closed when Bmin continues, that is, the heat storage device 30 does not absorb heat transferred by the outer unit 10 any more, the outer unit 10 only provides heat for the heating load, and the water supply temperature T continues to rise again until the maximum set temperature T is reachedSI.e. in (T)S－Tn3，TS) In the interval, the first solenoid valve 71 and the second solenoid valve 81 are both kept closed, and when the water supply temperature T is detected to reach the maximum set temperature TSWhen the outdoor unit 10 is automatically stopped, the controller controls the second electromagnetic valve 81 to be opened, heat is released through the heat storage device 30 at the moment, water in the heating branch 80 is circularly heated, the falling speed of the water supply temperature T is delayed, and the time interval of the next opening of the outdoor unit 10 is further prolonged.
Further, referring to FIGS. 1 and 2, when T is detected to be [0, TS－Tn1) During the interval, the first electromagnetic valve 71 and the second electromagnetic valve 81 are controlled to be kept closed;
when T ═ T is detectedS－Tn1Then, the first electromagnetic valve 71 is controlled to be opened;
when T ═ T is detectedS－Tn2When so, the first electromagnetic valve 71 is controlled to be closed;
when T ═ T is detectedSWhen the outdoor unit 10 stops, the second electromagnetic valve 81 is controlled to be opened;
wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn2＜TS－Tn1＜TS，
T is at the slave TS－Tn1Down to TS－Tn2Meanwhile, the heat output of the external unit in unit time is less than the load and the heat storage deviceThe sum of the absorbed heat.
In this embodiment, the external unit 10 enters the control logic as shown in fig. 2 when being turned on, and the detection module detects the water supply temperature T, and the water supply temperature T does not reach the first preset temperature TS－Tn1Before, the controller controls the first electromagnetic valve 71 and the second electromagnetic valve 81 to be kept in a closed state, and at this time, the high-temperature and high-pressure gaseous refrigerant generated by the external unit 10 is mainly used for heating the water to be heated in the heating loop 60, so that the water in the heating loop 60 reaches the first preset temperature value T at the fastest speedS－Tn1At the water supply temperature T reaching TS－Tn1During operation, in order to prolong the operation time of the external unit 10, the first electromagnetic valve 71 is controlled to be opened, so that part of high-temperature and high-pressure gaseous refrigerant is conveyed to the heat storage device 30 through the heat storage loop 70, the phase change material in the heat storage device 30 absorbs heat carried by the high-temperature and high-pressure gaseous refrigerant, if the heat output by the external unit 10 in unit time is less than the heating load and the heat absorbed by the heat storage device 30, that is, after the first electromagnetic valve 71 is opened, the water supply temperature T will show a downward trend, that is, T is at T from TS－Tn1Down to TS－Tn2Meanwhile, the first solenoid valve 71 is always kept in the open state, the second solenoid valve 81 is kept in the closed state, and the detection module detects that the water supply temperature T reaches the temperature TS－Tn2When the first electromagnetic valve 71 is closed, the outer unit 10 supplies heat to the heating load, the water supply temperature T is continuously increased again, and when the water supply temperature T reaches TS－Tn1Then, the first solenoid valve 71 is controlled to be opened again, and the above control is repeated a plurality of times, so that the rate of heat absorption by the heat storage device 30 per unit time decreases. When the water supply temperature T is detected to reach the maximum set temperature TSWhen the outdoor unit 10 is automatically stopped, the controller controls the second electromagnetic valve 81 to be opened, heat is released through the heat storage device 30 at the moment, water in the heating branch 80 is circularly heated, the falling speed of the water supply temperature T is delayed, and the time interval of the next opening of the outdoor unit 10 is further prolonged, wherein T is more than 0 and less than T in the embodimentS－Tn2＜TS－Tn1＜TSThe temperature T of the supplied water is from TS－Tn1Down to TS－Tn2During the period, the heat output by the external unit in unit time is less than the sum of the load and the heat absorbed by the heat storage device.
The invention also provides a heat pump unit, which comprises the flow path system of the heat pump unit.
Referring to fig. 1, in the present embodiment, the heat pump unit includes the flow path system as described above, the flow path system includes a refrigerant circuit 50 formed by serially connecting an external unit 10 and a heat exchange element 20, and a heating circuit 60 formed by serially connecting a water pump 40 and the heat exchange element 20, and further includes at least one heat storage device 30 arranged in parallel with the heat exchange element 20, each heat storage device 30 is respectively serially connected with the external unit 10 to form a heat storage circuit 70, a first electromagnetic valve 71 for controlling the opening and closing of the circuit is arranged on the heat storage circuit 70, the heating circuit 60 includes at least one heating branch 80, each heating branch 80 penetrates through one heat storage device 30, a second electromagnetic valve 81 for controlling the opening and closing of the heating branch 80 is arranged on the heating branch 80, the flow path system further includes a controller connected with the first electromagnetic valve 71 and the second electromagnetic valve 81, the heat storage device 30 is heat stored by controlling the opening of the first electromagnetic valve 71, the running time of the external unit 10 is prolonged, the second electromagnetic valve 81 is controlled to be opened to release heat from the heat storage device 30 after the external unit 10 is stopped, the time interval for the external unit 10 to be opened again is prolonged, the frequency of the external unit 10 in the heat pump unit to be started and stopped at a high temperature is reduced, and the stability of water supply and water temperature is guaranteed.
The invention further provides a control method of the heat pump unit.
Referring to fig. 3, fig. 3 is a flowchart of an embodiment of a control method of a heat pump unit according to the present invention.
In this embodiment, the control method includes the steps of:
s10: when the external machine is detected to be stopped when the water supply temperature reaches the highest set value when the running time is less than the preset value for at least two times, the following control logics are operated:
s20: controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed before the water supply temperature reaches a preset temperature;
s30: when the water supply temperature is detected to reach the preset temperature, the first electromagnetic valve is opened to convey heat to the heat storage device;
s40: and when the water supply temperature is detected to reach the highest set temperature, the first electromagnetic valve is closed, the second electromagnetic valve is opened to release heat from the heat storage device, and the second electromagnetic valve is closed until the external unit operates again.
In this embodiment, referring to fig. 1, when the heat pump unit is operated to realize heating, in order to reduce the influence of large fluctuation of the supplied water temperature caused by frequent start and stop of the outdoor unit 10 of the heat pump unit during operation to a certain extent, when the operation time of the outdoor unit 10 is detected to be less than the preset value at least twice continuously, so that the supplied water temperature reaches the highest set value and the outdoor unit is stopped, referring to the following control logic operation, before the supplied water temperature reaches the preset temperature, the first electromagnetic valve 71 and the second electromagnetic valve 81 are controlled to be kept closed, at this time, the high-temperature and high-pressure gaseous refrigerant generated by the outdoor unit 10 heats the water to be heated in the heating circuit 60 passing through the heat exchange element 20 only through the heat exchange element 20, so that the water to be heated in the heating circuit 60 reaches the preset temperature value in the shortest time, so as to realize preliminary heating, when the supplied water, in order to prolong the operation time of the external unit 10, the first electromagnetic valve 71 is controlled to be opened to convey heat to the heat storage device 30 so as to reduce the rising rate of the water supply temperature, when the water supply temperature is detected to reach the highest set temperature, the external unit 10 is automatically stopped, at the moment, the first electromagnetic valve 71 needs to be closed, and the second electromagnetic valve 81 is controlled to be opened at the same time, so that the water body in the heating branch 80 absorbs the heat stored in the heat storage device 30 when a circulating water path is formed through the heat storage device 30, the temperature falling rate of the water body in the heating loop 60 is reduced, the time interval for restarting the external unit 10 is further prolonged, the frequency of the external unit 10 in the heat pump unit to be started and stopped at a.
Further, based on the control method of the heat pump unit in the above embodiment, step S30 specifically includes:
when the heat storage device is detected not to absorb heat any more, controlling the first electromagnetic valve to be closed;
and when the supplied water temperature is detected to be reduced to a preset value, the output heat of the external machine in unit time is smaller than the sum of the load and the heat absorbed by the heat storage device, and the first electromagnetic valve is closed.
In the present embodiment, after controlling the first electromagnetic valve 71 to open for a certain period of time, two situations may occur: firstly, the temperature of the supplied water rises slowly, the heat output by the external unit 10 is larger than the sum of the load and the heat absorbed by the heat storage device 30, and the first electromagnetic valve 71 is controlled to be kept open until the heat storage device 30 is closed when no heat is absorbed any more; if the compressor is stopped, the heat storage device 30 is not saturated in heat, and the first electromagnetic valve 71 is also closed; secondly, after the first electromagnetic valve 71 is controlled to be opened for a period of time, the water supply temperature may decrease to a certain temperature, that is, after the first electromagnetic valve 71 is opened, the heat output by the external unit 10 in a unit time is smaller than the heat absorbed by the heating load and the heat storage device 30, at this time, the first electromagnetic valve 71 needs to be controlled to be closed, the water supply temperature may increase to the first preset temperature again, the first electromagnetic valve is controlled to be opened again, the first electromagnetic valve is closed after the control is repeated for multiple times, the water supply temperature may increase to the highest set temperature, and the external unit 10 is stopped.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flow path system of a heat pump unit comprises a refrigerant loop formed by serially connecting an external machine and a heat exchange element and a heating loop formed by serially connecting a water pump and the heat exchange element,
the flow path system also comprises at least one heat storage device which is arranged in parallel with the heat exchange element, each heat storage device is connected with the external unit in series to form a heat storage loop, each heat storage loop comprises an inlet end and a first electromagnetic valve, and the first electromagnetic valve is arranged on a pipeline between the inlet end and the heat storage device;
the heating loop comprises at least one heating branch, each heating branch penetrates through a heat storage device, each heating branch comprises an inlet end and a second electromagnetic valve, and the second electromagnetic valve is arranged on a pipeline between the inlet end and the heat storage device;
the flow path system also comprises a controller, wherein the controller is connected with each first electromagnetic valve and each second electromagnetic valve, controls the first electromagnetic valves to be opened to store heat or close the heat storage device, controls the second electromagnetic valves to be opened to release heat or close the heat storage device, and adjusts the starting and stopping frequency of the external unit;
the flow path system also comprises a detection module, and when T is detected to be [0, TS－Tn1) During the interval, controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed; when T ═ T is detectedS－Tn1When the first electromagnetic valve is opened, the first electromagnetic valve is controlled to be opened; wherein T is the temperature of the supplied water, TSIs the highest set temperature, and 0 < TS－Tn1＜TST is in [0, TS]In the interval, the heat output by the external machine in unit time is larger than the sum of the load and the heat absorbed by the heat storage device; after the outer machine stops, the controller controls the second electromagnetic valve to be opened to release heat from the heat storage device.
2. The flow path system of a heat pump unit according to claim 1, wherein the detection module detects that the external unit is shut down when the supply water temperature reaches the maximum set value at least twice continuously when the operation time is less than the preset value, and the controller is started.
3. The flow path system of a heat pump unit according to claim 1, wherein each heat storage device is filled with a phase change material.
4. The heat pump set flow path system of claim 1 or 2, wherein the flow path system comprises a heat storage device, and the controller is connected to the first solenoid valve on the heat storage loop and the second solenoid valve on the heating branch respectively.
5. A flow path system of a heat pump unit according to claim 4,
when T ═ T is detectedSAnd when the outdoor unit stops, the first electromagnetic valve is controlled to be closed, and the second electromagnetic valve is controlled to be opened.
6. A flow path system of a heat pump unit according to claim 4,
when the heat storage device is detected not to absorb heat any more, closing the first electromagnetic valve;
when T ═ T is detectedSAnd when the second electromagnetic valve is opened, the external machine stops and controls the second electromagnetic valve to be opened.
7. A flow path system of a heat pump unit according to claim 4,
when T ═ T is detectedS－Tn2When the first electromagnetic valve is closed, the first electromagnetic valve is controlled to be closed;
when T ═ T is detectedSWhen the second electromagnetic valve is opened, the outer machine stops and controls the second electromagnetic valve to be opened;
wherein, and 0 < TS－Tn2＜TS－Tn1＜TS，
T is at the slave TS－Tn1Down to TS－Tn2During the period, the heat output by the external unit in unit time is less than the sum of the load and the heat absorbed by the heat storage device.
8. A heat pump unit, characterized in that it comprises a flow path system of a heat pump unit according to any of claims 1-7.
9. A method for controlling a heat pump unit according to claim 8, characterized in that the method comprises the steps of:
when the external machine is detected to be stopped when the water supply temperature reaches the highest set value when the running time is less than the preset value for at least two times, the following control logics are operated:
controlling the first electromagnetic valve and the second electromagnetic valve to be kept closed before the water supply temperature reaches a preset temperature;
when the water supply temperature is detected to reach the preset temperature, the first electromagnetic valve is opened to convey heat to the heat storage device;
and when the water supply temperature is detected to reach the highest set temperature, the first electromagnetic valve is closed, the second electromagnetic valve is opened to release heat from the heat storage device, and the second electromagnetic valve is closed until the external unit operates again.
10. The heat pump unit control method according to claim 9, wherein the step of opening the first electromagnetic valve to transfer heat to the heat storage device when detecting that the temperature of the supplied water reaches a preset temperature specifically comprises:
when the heat storage device is detected not to absorb heat any more, controlling the first electromagnetic valve to be closed; and when the supplied water temperature is detected to be reduced to a preset value, the output heat of the external machine in unit time is smaller than the sum of the load and the heat absorbed by the heat storage device, and the first electromagnetic valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611151454.4A CN106765499B (en) | 2016-12-13 | 2016-12-13 | Flow path system of heat pump unit, heat pump unit and control method of heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611151454.4A CN106765499B (en) | 2016-12-13 | 2016-12-13 | Flow path system of heat pump unit, heat pump unit and control method of heat pump unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106765499A CN106765499A (en) | 2017-05-31 |
| CN106765499B true CN106765499B (en) | 2020-08-04 |
Family
ID=58887809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611151454.4A Active CN106765499B (en) | 2016-12-13 | 2016-12-13 | Flow path system of heat pump unit, heat pump unit and control method of heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106765499B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6689801B2 (en) * | 2017-09-13 | 2020-04-28 | 矢崎エナジーシステム株式会社 | Solar air conditioning system |
| CN108224845B (en) * | 2017-12-21 | 2021-01-08 | 青岛海尔空调电子有限公司 | Heat storage air conditioning system and control method |
| CN109798662B (en) * | 2019-01-15 | 2021-05-18 | 合肥美的暖通设备有限公司 | Heat storage and exchange heat pump water heater and control method thereof |
| CN110131890B (en) * | 2019-05-20 | 2021-07-23 | 合肥美的暖通设备有限公司 | Heat pump water heater, control method, and computer-readable storage medium |
| CN110131889B (en) * | 2019-05-20 | 2021-11-16 | 合肥美的暖通设备有限公司 | Heat pump water heater, control method, and computer-readable storage medium |
| CN110793199A (en) * | 2019-11-08 | 2020-02-14 | 广东美的暖通设备有限公司 | Heat pump water heater system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595018A (en) * | 2004-07-15 | 2005-03-16 | 南京大学 | Air-cooled air conditioner by employing heat pump energy accumulation |
| CN2807123Y (en) * | 2005-07-07 | 2006-08-16 | 虞海灿 | Energy-storage heat pump water heater system for commercial purpose |
| CN1892126A (en) * | 2005-07-06 | 2007-01-10 | 张跃 | Air-conditioner energy-accumulation control method and apparatus |
| CN201373566Y (en) * | 2008-12-25 | 2009-12-30 | 惠州市思想科技有限公司 | Energy-storing quickly-heating heat pump water heater |
| JP2010175164A (en) * | 2009-01-30 | 2010-08-12 | Panasonic Corp | Liquid circulation type heating system |
| CN102607169A (en) * | 2012-03-08 | 2012-07-25 | 广东美的电器股份有限公司 | Instant-heating heat pump water heater and heating control method for same |
| JP5052571B2 (en) * | 2009-07-07 | 2012-10-17 | リンナイ株式会社 | Hot water storage heating unit |
| CN105371500A (en) * | 2015-11-13 | 2016-03-02 | 太原理工大学 | Phase change heat storage air source heat pump hot water unit control system and control method thereof |
-
2016
- 2016-12-13 CN CN201611151454.4A patent/CN106765499B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595018A (en) * | 2004-07-15 | 2005-03-16 | 南京大学 | Air-cooled air conditioner by employing heat pump energy accumulation |
| CN1892126A (en) * | 2005-07-06 | 2007-01-10 | 张跃 | Air-conditioner energy-accumulation control method and apparatus |
| CN2807123Y (en) * | 2005-07-07 | 2006-08-16 | 虞海灿 | Energy-storage heat pump water heater system for commercial purpose |
| CN201373566Y (en) * | 2008-12-25 | 2009-12-30 | 惠州市思想科技有限公司 | Energy-storing quickly-heating heat pump water heater |
| JP2010175164A (en) * | 2009-01-30 | 2010-08-12 | Panasonic Corp | Liquid circulation type heating system |
| JP5052571B2 (en) * | 2009-07-07 | 2012-10-17 | リンナイ株式会社 | Hot water storage heating unit |
| CN102607169A (en) * | 2012-03-08 | 2012-07-25 | 广东美的电器股份有限公司 | Instant-heating heat pump water heater and heating control method for same |
| CN105371500A (en) * | 2015-11-13 | 2016-03-02 | 太原理工大学 | Phase change heat storage air source heat pump hot water unit control system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106765499A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106765499B (en) | Flow path system of heat pump unit, heat pump unit and control method of heat pump unit | |
| KR100859245B1 (en) | Heat pump hot water supply floor heating apparatus | |
| KR101109730B1 (en) | Chiller apparatus for semiconductor process and Method for controlling temperature in the same | |
| CN106595126B (en) | Outer unit control system, heat pump unit and control method thereof | |
| WO2015141163A1 (en) | Heat storage device and hot water generation device provided with same | |
| JP5095295B2 (en) | Water heater | |
| WO2015032293A1 (en) | Refrigeration- and heat accumulation method and refrigeration- and heating anti-frost method and air conditioning system | |
| CN105570088A (en) | Air conditioning unit oil temperature control system and method | |
| JP2010025440A (en) | Air conditioning system | |
| JP2012172869A (en) | Heat pump device | |
| KR101591290B1 (en) | Heat pump system having binary refrigeration cycle and control porcess of the same | |
| CN108253643B (en) | Instant-heating heat-storage heat pump and solar energy coupling hot water system and control method | |
| US20180010809A1 (en) | Heat Supply System | |
| CN111425916B (en) | Heating system and control method thereof | |
| JP5068599B2 (en) | Water heater | |
| JP2009168403A (en) | Chiller device | |
| AU2020280293B2 (en) | Water heater, control method for water heater and storage medium | |
| CN104129015A (en) | Self-circulation air-cooling mold temperature controller | |
| CN106765525A (en) | The stream control system of outer machine, constant speed Air-Cooled Heat Pump Unit and its control method | |
| JP2017032149A (en) | Hot water heating device | |
| CN106765524B (en) | Outer unit control system, heat pump unit and control method thereof | |
| JP2011141069A (en) | Bath device | |
| JP2009014305A (en) | Chiller device | |
| TWI791247B (en) | Central temperature control system for adjusting the temperature of multiple food machines | |
| JPH05248726A (en) | Absorption refrigerating machine |
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 |