CN111678254A - Air source heat pump unit - Google Patents
Air source heat pump unit Download PDFInfo
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- CN111678254A CN111678254A CN202010494980.0A CN202010494980A CN111678254A CN 111678254 A CN111678254 A CN 111678254A CN 202010494980 A CN202010494980 A CN 202010494980A CN 111678254 A CN111678254 A CN 111678254A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an air source heat pump unit, comprising: a water tank; a host group; the plurality of sub-units are in communication connection with the main unit and connected to the water tank in parallel; a first temperature detection element; the main controller is in communication connection with the main unit, a water tank is arranged in the main controller for setting water temperature, the heating capacity of each unit is obtained, the heating capacity is sequenced, the heating capacity of the units is accumulated and summed one by one according to the sequence of the serial numbers from small to large, the accumulated sum value of each time is compared with the heating capacity of the water tank, when the accumulated sum value is larger than the heating capacity of the water tank, accumulation is stopped, the units participating in accumulation and summation are determined, and the number of the compressors needing to be started is obtained through the sum of the number of the compressors participating in accumulation and summation; and judging the compressor to be started according to the accumulated running time of the compressor or the serial numbers of all the units. The invention solves the problems that the impact on the power grid of the air source heat pump unit in the prior art has great influence on the system performance and the effective utilization rate of heat is low.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to an improvement of an air source heat pump unit structure.
Background
The existing air source heat pump unit is generally provided with a main unit and a plurality of sub-units, the main unit and the sub-units are connected with a water tank, water in the water tank is heated, the water tank can provide hot water, 1 or 2 compressors are correspondingly arranged in each sub-unit, when the unit is required to work to prepare hot water, the compressors in all the units are controlled to be started simultaneously, and when actual water temperature reaches the set water temperature of the water tank, the compressors in all the units are stopped simultaneously.
By adopting the mode to control the unit to operate, the starting times and the stopping times of all the units in unit time are increased, and the frequent starting and stopping of all the units in unit time are easily caused. The frequent starting and stopping of the unit can increase the impact frequency to the power grid, and the impact to the power grid is large; the unit may be shut down if the minimum running time requirement of the compressor is not met, oil in the compressor enters into the system more, oil return is less, oil shortage of the compressor is caused, oil shortage inside the compressor can cause abrasion of parts inside the compressor, running efficiency of the compressor is reduced, performance of the unit is reduced, and service life of the compressor is reduced; when the hot water is not used in real time, all the units are started in sequence and then work simultaneously, and after the set water temperature of the water tank is reached quickly, the heat preservation time is long, the heat loss is large, and the heat utilization rate is low.
Disclosure of Invention
The invention provides an air source heat pump unit, which aims to solve the problems that impact on a power grid has great influence on system performance and the effective heat utilization rate is low when an air source heat pump unit in the prior art is used.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an air source heat pump unit, comprising:
a water tank;
the main unit is connected with the water tank;
the plurality of sub-units are in communication connection with the main unit, and are connected to the water tank in parallel and connected with the main unit in parallel;
the first temperature detection element is arranged in the water tank and used for detecting the temperature of the water tank;
the main controller is in communication connection with the main unit, a water tank is preset in the main controller for setting water temperature, and the main controller is configured as follows: when the actual water temperature of the water tank is detected to be smaller than the set water temperature of the water tank, the heating capacity of each unit is obtained, and the heating capacity of the units is sequenced according to the size sequence or the number prestored in the main controller;
accumulating one by one according to the ordering sequence of the heating capacity, judging the magnitude of an accumulated summation value and the heating capacity required by the water tank after accumulating one unit heating capacity each time, and stopping accumulation when detecting that the accumulated summation value is larger than the heating capacity required by the water tank to obtain a unit participating in accumulated summation;
obtaining the number of compressors to be started through the sum of the number of the compressors corresponding to the units participating in the accumulation summation;
and judging the compressor to be started according to the accumulated running time of the compressor or the serial numbers of all the units.
Further, the heat quantity required by the water tank for heating is QWater tankObtained by the following formula: qWater tankand the sum of the required heating quantity of the water tank and the accumulated heating quantity of the unit meets the following formula, wherein the sum is Q1+ Q2+ Q3+ … … + Qn is more than or equal to 1.163 × V (Ts-Tr).
Further, the master is configured to: and communicating with the main unit, acquiring the accumulated running time of the compressors corresponding to all the units, controlling the compressors in all the units to be started from small to large according to the accumulated running time of the compressors when the accumulated running time of the compressors is different, and controlling the partial units to be started sequentially according to the numbers prestored in the main controller when detecting that the accumulated running time of the compressors in the partial units is the same.
Further, the master is configured to: and communicating with the main unit to obtain the accumulated running time of the compressors corresponding to all the units, and controlling the units to sequentially start the compressors in the units according to the numbers prestored in the main controller when the accumulated running times of the compressors are all the same.
Further, the main controller judges the units participating in the accumulated summation according to whether the accumulated summation value of the unit heating capacity from small to large is larger than the heat required by heating the water tank.
Further, the master is configured to:
and acquiring the actual water temperature of the water tank detected by the first temperature detection element, and controlling the start and stop of a compressor of the unit according to the actual water temperature of the water tank and the set water temperature of the water tank.
Further, the method also comprises the following steps:
the second temperature detection element is used for detecting the ambient temperature around the water tank and is in communication connection with the main controller;
the master is configured to: when the environment temperature is detected to be lower than the preset environment temperature and the water tank temperature is detected to be lower than the first preset water tank temperature, the system is communicated with the main unit to obtain the accumulated running time of the compressors in the main unit and the sub-units, and the compressors in the units are controlled to be started in sequence according to the accumulated running time of the compressors in the sub-units and the number of the preset starting compressors in the main controller;
and when the water temperature in the water tank reaches the preset temperature of the second water tank, controlling a part of the started compressors to stop.
Further, the master is configured to: when the detected ambient temperature is lower than the preset ambient temperature and the water tank temperature is lower than the water tank anti-freezing temperature, the unit heating capacity is sequenced according to the size sequence or the serial number prestored in the main controller;
accumulating one by one according to the sequence of the heating capacity, judging the magnitude of an accumulated summation value and the heat required by the water tank for preventing freezing after accumulating one unit heating capacity each time, and stopping accumulation when detecting that the accumulated summation value is larger than the heat required by the water tank for preventing freezing to obtain a unit participating in accumulated summation;
and obtaining the number of the compressors needing to be started according to the sum of the numbers of the compressors in all the units participating in the accumulation summation, and controlling the compressors to be started according to the accumulated running time of the compressors or the serial number of the units until the number of the compressors needing to be started is reached.
Further, the heat quantity required by the water tank for preventing freezing is QThe anti-freezing agent is used for preventing freezing,Qantifreezing =4.187×（Tz-ThAnti-freezing device) V/3.6, wherein Tz is the third preset water tank temperature pre-stored in the main controller, ThAnti-freezing deviceThe antifreezing temperature of the water tank, and V is the container of the water tank.
furthermore, the heating capacity of the unit and the anti-freezing capacity of the water tank meet the following formula that Q1+ Q2+ Q3+ … … + Qn is more than or equal to 4.187 × (Tz-Th)Anti-freezing device）/V/3.6。
Compared with the prior art, the technical scheme of the invention has the following technical effects:
according to the air source heat pump unit, when the air source heat pump unit is used, the heating capacity of the unit is sequenced and then is accumulated one by one, each accumulated sum value is compared with the heating capacity of a water tank, when the heating capacity of the unit is larger than the heating capacity of the water tank, accumulation is stopped, the unit participating in accumulation is obtained, the number of compressors needing to be started just is obtained according to the number of the compressors corresponding to the unit participating in accumulation, all the compressors in the unit do not need to be started completely, and the problem of large impact on a power grid caused by frequent starting of all the compressors is avoided;
meanwhile, when the unit is used, all the compressors do not need to be started frequently, but only part of the compressors are started, so that the problems that the compressors are in oil shortage due to frequent starting, the service life is short and the system performance is low are solved;
the main controller obtains the number of the compressors which just need to be started through calculation, and the problems that the heat provided for the whole water tank is too much and the heat loss is large due to the fact that redundant compressors are started are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of an air source heat pump unit according to the present invention;
FIG. 2 is a schematic view of the control flow of the air source heat pump unit of the present invention for controlling the start of the compressor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The invention provides an embodiment of an air source heat pump unit, which comprises:
a water tank 100, wherein water is placed in the water tank 100 and can be used by a user after being heated;
a main unit 200 connected to the water tank 100;
a plurality of sub units 300 which are connected with the main unit 200 in a communication manner, wherein the plurality of sub units 300 are connected to the water tank 100 in parallel and connected with the main unit 200 in parallel, and the number of compressors contained in each sub unit 300 is the same as that of the compressors contained in the main unit 200; when the main unit 200 and the sub-unit 300 are shipped, the corresponding internal structures are completely the same, and when the main unit 200 and the sub-unit 300 are used, one of the units can be set as the main unit 200 in a dial setting mode.
The main unit group 200 and the sub unit group 300 each include:
the evaporimeter, compressor and heat exchanger, its compressor correspond and the evaporimeter, the heat exchanger is connected and is formed refrigerant circulation circuit, when being connected with water tank 100, can correspond and set up a coil pipe heat exchanger, its setting that corresponds is in the heat exchanger side, a heat for absorbing the heat that the heat exchanger side distributes, the coil pipe heat exchanger is including cold water inlet and hot water delivery port, cold water gets into and flows out to water tank 100 after the heat exchanger side heat is absorbed through the coil pipe heat exchanger in, make the water that enters into in the water tank 100 for the hot water that is heated, connect user water terminal on water tank 100, make the user can use hot water from water tank 100.
Each of the main unit 200 and the sub-unit 300 may include at least one compressor, that is, each of the main unit 200 and the sub-unit 300 may be correspondingly provided with a plurality of compressors, such as 2 or 3 compressors, and the number of the compressors in the main unit 200 and the number of the compressors in all the sub-units 300 may be the same or different, and the specific structure may refer to an air source heat pump unit structure with a plurality of compressors of different numbers in the prior art, which is not described herein in detail.
When the water tank is arranged, in order to quickly heat water in the water tank 100, a plurality of units can be correspondingly arranged when the water tank is arranged, namely the structure of the water tank can be set to a structural mode comprising one main unit 200 and a plurality of sub-units 300, and when the water tank is connected, the main unit 200 and the sub-units 300 are connected to the water tank 100 in parallel to provide heat for the water tank 100.
The master controller, be connected with the communication of main unit group 200, during specific setting, main unit group 200 corresponds through the drive-by-wire ware and is connected with the master controller communication, can be used to transmit the signal and give the master controller, be provided with the auxiliary control board on each sub unit 300, it also is provided with the main control board to correspond on main unit group 200, the auxiliary control board corresponds and is connected with the main control board communication on the main unit group 200, the main control board corresponds through the drive-by-wire ware and is connected with main control unit communication, signals such as compressor cumulative operating time in each sub unit 300 mainly transmit to the main control board of main unit group 200, then transmit to main control unit through the main control board, realize the communication between sub unit 300 and the master controller through.
A first temperature detecting element provided in the water tank 100 for detecting a temperature of the water tank 100;
the water tank is preset with a set water temperature inside the main controller, and the water tank is configured as follows: when the actual water temperature of the water tank is detected to be smaller than the set water temperature of the water tank, the heating capacity of each unit is obtained, the heating capacities are sorted according to the sizes or numbers prestored in the main controller by the units, the heating capacities are accumulated one by one according to the sorting sequence of the heating capacities, the accumulated sum value and the heating required heat of the water tank 100 are judged after the heating capacity of one unit is accumulated each time, and when the accumulated sum value is detected to be larger than the heating required heat of the water tank 100, accumulation is stopped, and the unit participating in accumulation and summation is obtained;
obtaining the number of compressors to be started through the sum of the number of the compressors corresponding to the units participating in the accumulation summation;
specifically, the main controller mainly determines the units participating in the accumulated summation according to whether the value of the unit heating capacity accumulated and summed in sequence is larger than the heat required by heating the water tank 100.
And obtaining the number of the compressors to be started through the sum of the numbers of the compressors corresponding to the units participating in the accumulated summation.
And judging the compressor to be started according to the accumulated running time of the compressor or the serial numbers of all the units.
For convenience of description, in this embodiment, the heat quantity required for heating the water tank 100 is set to be QWater tankObtained by the following formula: qWater tankand =1.163 × (Ts-Tr) × V, where Tr is the actual water temperature of the tank, Ts is the set water temperature of the tank set by the controller, and V is the volume of the tank 100.
The sum of the heat required by the heating of the water tank 100 and the accumulated heating capacity of the unit satisfies the following formula: q1+ Q2+ Q3+ … … + Qn.gtoreq.1.163 XV × (Ts-Tr).
Assuming that the sum of the number of the main unit 200 and the number of the sub-unit 300 in this embodiment is n, each unit corresponds to one heating capacity, and the heating capacities are data values obtained through experimental determination during shipment and are all calibrated on the units.
And if the heating capacity of all the units is the same, sequencing the heating capacity of all the units in sequence according to the number prestored in the main controller by the units, so that the heating capacity of each unit corresponds to one serial number.
And if the heating capacity of all the units is different, sequencing the heating capacities in turn from small to large.
If the corresponding heating capacity sequences of the n units obtained after sequencing according to the pre-stored numbers or the heating capacity sizes in the master controller are Q1, Q2 and Q3 … … Qn, when the units participating in the accumulation summation are determined, the units are determined according to the inequality: q1+ Q2+ Q3+ … … + Qn.gtoreq.1.163 XV × (Ts-Tr).
According to the sequence, the heating capacity of the unit is sequentially nested into the above formula according to the serial number for calculation, and whether the value on the left side of the inequality is larger than or equal to the value on the right side of the inequality is determined, for example, when n is 3, Q1+ Q2+ Q3 is less than 1.163 XV (Ts-Tr), which is not satisfactory, and at this time, the accumulation is required to be continued, n is 4, if Q1+ Q2+ Q3+ Q4 is more than 1.163 xT (Ts-Tr) when n is 4, more than 1.163 xV (Ts-Tr) is satisfied, that is, once the sum of the heating capacity accumulations of the units is greater than the heating capacity of the water tank 100, the accumulation is stopped, and at this time, it is determined that the units participating in the accumulated sum are the units whose heating capacity numbers correspond to Q1, Q2, Q3, Q4, and, at this time, and acquiring the number of the compressors needing to be started according to the sum of the compressors in the unit corresponding to the heating capacity.
The number of compressors contained in the corresponding units Q1, Q2, Q3 and Q4 is m1 and m2 respectively
m3 and m4, and the number of compressors needing to be started is m, then m = m1+ m2+ m3+ m 4.
Specifically, the master is configured to: and communicating with the main unit 200 to obtain the accumulated running time of the compressors corresponding to all the units, controlling the compressors in all the units to be started from small to large according to the accumulated running time of the compressors when the accumulated running times of the compressors are different, and controlling the units to be started sequentially according to the numbers prestored in the main controller when detecting that the accumulated running times of the compressors in some units are the same.
And when the accumulated running time of the compressors is completely the same, the control unit sequentially starts all the compressors in the unit according to the numbers prestored in the main controller.
When the main controller detects that the difference value between the set water temperature of the water tank and the actual water temperature of the water tank is greater than or equal to zero, the main controller controls the compressor of the unit to stop. When the compressors in the control unit are stopped, the compressors can be stopped in sequence according to the starting sequence of the compressors, and the stop time interval of two adjacent compressors is ensured to be within the set stop time range, for example, the stop time interval is set to be greater than 5 s.
And if the difference value between the set water temperature of the water tank and the actual water temperature of the water tank is not larger than zero, continuously controlling the unit to keep the running state.
Because the user can select different volumetric water tanks 100 and use with it when using air source heat pump set and water tank 100 cooperation, the volume of water tank 100 may be unknown, and the acquisition mode of water tank 100 container has following several in this embodiment:
if the volume of the water tank 100 can be set in the controller, the actual volume T of the water tank 100 on site is input into the main controller;
if the setting of the volume of the water tank 100 cannot be performed in the controller, the unit is required to automatically calculate the volume V of the water tank 100 through an actual heating process.
The specific calculation process is as follows:
starting a P machine set (P is more than or equal to 1), operating TY1 time (TY 1 is more than 0 minute), after the machine is stabilized, the actual water temperature is Tr3, operating TY2 time (TY 2 is more than 0, unit: h), and increasing the water temperature to Tr4, wherein Tr4-Tr3 is more than or equal to 1 ℃, and then calculating the volume V of the water tank 100 according to the following formula:
V=P×Q×TY2 /（Tr4 - Tr3）/ 1.163
in addition, the volume V of the water tank 100 can be set by dialing the main control board of the main unit 200.
The air source heat pump unit in this embodiment can also realize the anti-freezing protection of the water tank 100, and as a control mode corresponding to the anti-freezing master controller of the water tank 100 in this embodiment, the control mode is as follows:
set up second temperature detect element for detect the ambient temperature around the water tank 100, the master controller is through being connected with second temperature detect element communication, acquires the temperature value of water tank 100 surrounding environment.
The master controller is matched with the main unit 200 to detect that the ambient temperature is less than the preset ambient temperature, when the temperature of the water tank 100 is less than the anti-freezing temperature of the water tank, the accumulated running time of the compressors in the main unit 200 and each sub-unit 300 is obtained, the number of the compressors is started according to the accumulated running time of the compressors of each unit and the preset number of the compressors in the master controller, the compressors in the control unit are started in sequence, namely the number of the compressors to be started is preset in the master controller, and the compressors to be started can be started in sequence according to the accumulated running time of the compressors.
And when the water temperature in the water tank 100 reaches the preset temperature of the second water tank, controlling the partial compressors in the started compressors to stop, only keeping the partial compressors to run at the moment, and ensuring the temperature of the water tank 100, wherein when the water temperature in the water tank 100 reaches the set temperature of the water tank 100, all the compressors are controlled to stop.
Another control method corresponding to the anti-freezing main controller of the water tank 100 in this embodiment is as follows:
the main controller is communicated with the main unit group 200 to obtain the heating capacity of each unit when detecting that the ambient temperature is less than the preset ambient temperature and the temperature of the water tank 100 is less than the anti-freezing temperature of the water tank, the heating capacities are sorted according to the sizes or numbers pre-stored in the main controller by the units, the heating capacities are accumulated one by one according to the sorting sequence of the heating capacities, the accumulated summation value and the heating required heat of the water tank 100 are judged after the heating capacity of one unit is accumulated each time, and the accumulation is stopped when detecting that the accumulated summation value is greater than the heating required heat of the water tank 100, so that the unit participating in the accumulated summation;
and obtaining the number of the compressors needing to be started according to the sum of the numbers of the compressors in the unit participating in the accumulation summation, and controlling the compressors to be started according to the accumulated running time of the compressors or the number of the unit until the number of the compressors needing to be started is reached.
The heat quantity required for the water tank 100 to prevent freezing is set to QAnti-freezing deviceWhich can be represented by the formula QAnti-freezing device= 4.187×（Tz-ThAnti-freezing device) V/3.6, wherein Tz is the temperature of a third preset water tank 100 prestored inside the main controller, ThAnti-freezing deviceV is the tank 100 container for the tank freeze protection temperature.
the heating capacity of the unit and the heat required by the water tank 100 for preventing freezing meet the following formula that Q1+ Q2+ Q3+ … … + Qn is more than or equal to 4.187 × (Tz-Th)Anti-freezing device）/V/3.6。
Similarly, the heating quantities are sequentially arranged and then accumulated and summed one by one, the accumulated heating quantities are correspondingly compared with the quantity of heat required by the water tank 100 for antifreezing once, if the accumulated heating quantities are larger than the quantity of heat required by the water tank 100 for antifreezing, the units participating in the accumulated summation can be correspondingly obtained, and the quantity of the compressors to be started is obtained according to the sum of the quantity of the compressors in all the units participating in the accumulated summation.
The number of compressors to be switched on can be obtained according to the accumulated running time of the compressors or the number pre-stored in the master controller by the unit as described in the above embodiments.
According to the air source heat pump unit provided by the invention, when the unit is used, the heating capacity of the unit is sequenced and then is accumulated one by one, the accumulated sum value of each time is compared with the heating capacity of the water tank 100, when the accumulated sum value is larger than the heating capacity of the water tank 100, accumulation is stopped, the unit participating in accumulation is obtained, the number of compressors which need to be started just is obtained according to the number of the corresponding compressors in the unit participating in accumulation, all the compressors in the unit do not need to be started completely, and the problem of large impact on a power grid caused by frequent starting of all the compressors is avoided;
meanwhile, when the unit is used, all the compressors do not need to be started frequently, but only part of the compressors are started, so that the problems that the compressors are in oil shortage due to frequent starting, the service life is short and the system performance is low are solved;
the main controller obtains the number of the compressors which just need to be started through calculation, and the problems that the heat provided for the whole water tank 100 is too much and the heat loss is large due to the fact that redundant compressors are started are avoided.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air source heat pump unit comprises:
a water tank;
the main unit is connected with the water tank;
the plurality of sub-units are in communication connection with the main unit, and are connected to the water tank in parallel and connected with the main unit in parallel;
the first temperature detection element is arranged in the water tank and used for detecting the temperature of the water tank;
the main controller is in communication connection with the main unit, a water tank is preset in the main controller for setting water temperature, and the main controller is configured as follows: when the actual water temperature of the water tank is detected to be smaller than the set water temperature of the water tank, the heating capacity of each unit is obtained, and the heating capacity of the units is sequenced according to the size sequence or the number prestored in the main controller;
accumulating one by one according to the ordering sequence of the heating capacity, judging the magnitude of an accumulated summation value and the heating capacity required by the water tank after accumulating one unit heating capacity each time, and stopping accumulation when detecting that the accumulated summation value is larger than the heating capacity required by the water tank to obtain a unit participating in accumulated summation;
obtaining the number of compressors to be started through the sum of the number of the compressors corresponding to the units participating in the accumulation summation;
and judging the compressor to be started according to the accumulated running time of the compressor or the number prestored in the main controller by all the units.
2. The air source heat pump unit of claim 1, wherein the amount of heat required for heating the water tank is QWater tankObtained by the following formula: qWater tankand the sum of the required heating quantity of the water tank and the accumulated heating quantity of the unit meets the following formula, wherein the sum is Q1+ Q2+ Q3+ … … + Qn is more than or equal to 1.163 × V (Ts-Tr).
3. The air source heat pump unit of claim 1, wherein the master controller is configured to: and communicating with the main unit, acquiring the accumulated running time of the compressors corresponding to all the units, controlling the compressors in all the units to be started from small to large according to the accumulated running time of the compressors when the accumulated running time of the compressors is different, and controlling the partial units to be started sequentially according to the numbers prestored in the main controller when detecting that the accumulated running time of the compressors in the partial units is the same.
4. The air source heat pump unit of claim 1, wherein the master controller is configured to: and communicating with the main unit to obtain the accumulated running time of the compressors corresponding to all the units, and controlling the units to sequentially start the compressors in the units according to the numbers prestored in the main controller when the accumulated running times of the compressors are all the same.
5. The air source heat pump unit of claim 1, wherein the master controller continues to accumulate the unit heating capacity when detecting that the accumulated sum is less than the heat required for heating the water tank.
6. The air source heat pump unit of claim 1, wherein the master controller is configured to:
and acquiring the actual water temperature of the water tank detected by the first temperature detection element, and controlling the start and stop of a compressor of the unit according to the actual water temperature of the water tank and the set water temperature of the water tank.
7. The air source heat pump unit of claim 1, further comprising:
the second temperature detection element is used for detecting the ambient temperature around the water tank and is in communication connection with the main controller;
the master is configured to: when the environment temperature is detected to be lower than the preset environment temperature and the water tank temperature is detected to be lower than the water tank anti-freezing temperature, the method is communicated with the main unit to obtain the accumulated running time of the compressors in the main unit and the sub-units, and the compressors in the units are controlled to be started in sequence according to the accumulated running time of the compressors in the sub-units and the number of the preset starting compressors in the main controller;
and when the water temperature in the water tank reaches the preset temperature of the second water tank, controlling a part of the started compressors to stop.
8. The air source heat pump unit of claim 1, wherein the master controller is configured to: when the detected ambient temperature is lower than the preset ambient temperature and the water tank temperature is lower than the water tank anti-freezing temperature, the unit heating capacity is sequenced according to the size sequence or the serial number prestored in the main controller;
accumulating one by one according to the sequence of the heating capacity, judging the magnitude of an accumulated summation value and the heat required by the water tank for preventing freezing after accumulating one unit heating capacity each time, and stopping accumulation when detecting that the accumulated summation value is larger than the heat required by the water tank for preventing freezing to obtain a unit participating in accumulated summation;
and controlling the compressors to be started according to the accumulated running time of the compressors or the serial number of the unit until the number of the compressors to be started is reached.
9. The air source heat pump unit of claim 8, wherein the amount of heat required to prevent freezing of the water tank is QThe anti-freezing agent is used for preventing freezing,Qantifreezing =4.187×（Tz-ThAnti-freezing device) V/3.6, wherein Tz is the third preset water tank temperature pre-stored in the main controller, ThAnti-freezing deviceThe antifreezing temperature of the water tank, and V is the container of the water tank.
10. the air source heat pump unit as claimed in claim 8, wherein the heat capacity of the unit and the heat capacity required for preventing freezing of the water tank satisfy the following formula Q1+ Q2+ Q3+ … … + Qn ≥ 4.187 × (Tz-Th)Anti-freezing device）/V/3.6。
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Application publication date: 20200918 |