CN113669968A - Energy regulation control method for variable-frequency compressor of air-source heat pump - Google Patents
Energy regulation control method for variable-frequency compressor of air-source heat pump Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 6
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
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Abstract
The invention discloses a method for adjusting and controlling a variable-frequency compressor of an air-source heat pump, and relates to the technical field of air-source heat pumps. The air source heat pump variable frequency compressor adjustable control method is used for heating circulating water to preset water temperature, and comprises the following steps: s1, starting the compressor; s2, adjusting the frequency of the compressor according to the environment temperature and the preset water temperature; s3, analyzing according to the difference value delta Ts between the preset water temperature and the actually measured water temperature change rate delta Tw to obtain the frequency adjustment quantity delta f of the compressor; s4, adjusting the frequency of the compressor according to the delta f, and calculating the formula: f ═ Fc + Δf; the target frequency of the F-compressor, the current operating frequency of the Fc-compressor, Δ F-the frequency adjustment of the compressor. The invention can pre-adjust the compressor according to the environment temperature and the preset water temperature, and then accurately adjust the compressor according to the delta Ts and the delta Tw, thereby improving the accurate control of the frequency of the compressor and reducing the energy waste.
Description
Technical Field
The invention relates to the technical field of air source heat pumps, in particular to a method for adjusting and controlling a variable frequency compressor of an air source heat pump.
Background
Compared with a fixed-frequency heat pump system, the variable-frequency air source heat pump system has the advantages of large heating capacity, high energy efficiency and the like, and particularly has more obvious advantages at low ambient temperature. The variable-frequency air source heat pump system mainly comprises a variable-frequency compressor, an electronic expansion valve, an evaporator and a condenser, circulating water and air compressed by the variable-frequency compressor are subjected to heat exchange in the condenser until the circulating water is heated to a preset water temperature in a circulating mode, the electronic expansion valve plays a role in pressure relief of the air, and the evaporator preheats the air to reduce energy consumption of the variable-frequency compressor.
Currently, the frequency of the inverter compressor is mainly adjusted to realize the adjustment of the inverter air source heat pump system, and the frequency adjusting method adopted by the inverter compressor takes the difference value between the target temperature of the water tank and the instant temperature of the water tank as a feedback object, namely when the temperature difference between the target temperature and the instant temperature of the water tank is greater than a certain value, the inverter compressor operates at a high frequency as much as possible to improve the heat production amount (temperature rise operation), and shorten the heating time; when the temperature difference between the two is less than a certain value, the frequency of the variable frequency compressor is dynamically adjusted, so that the temperature of the water tank is stabilized within a target temperature range (stable operation). However, in practical use, the frequency of the inverter compressor is different according to different environmental temperatures, and the conventional method for adjusting the frequency of the inverter compressor only according to the water temperature difference is not accurate enough, and the problems of energy waste such as large power consumption, large load and the like exist.
Accordingly, there is a need for a method for controlling the modulation of an inverter compressor of an air-source heat pump to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for adjusting and controlling a variable-frequency compressor of an air-source heat pump, which can improve the accurate control of the frequency of the compressor and reduce the energy waste.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for controlling the adjustment of a variable frequency compressor of an air-source heat pump is used for heating circulating water to a preset water temperature, and comprises the following steps:
s1, starting the compressor;
s2, adjusting the frequency of the compressor according to the environment temperature and the preset water temperature;
s3, analyzing according to the difference value delta Ts between the preset water temperature and the actually measured water temperature change rate delta Tw to obtain the frequency adjustment quantity delta f of the compressor;
s4, adjusting the frequency of the compressor according to delta f, and calculating the formula: f ═ Fc + Δf; f-the target frequency of the compressor, Fc-the current operating frequency of the compressor, af-the frequency adjustment of the compressor.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, the step S1 includes:
s11, starting the compressor;
s12, raising the frequency of the compressor to 50 Hz;
and S13, operating the compressor for 3-5 min.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, the step S2 includes:
s21, when the ambient temperature is lower than or equal to minus 8 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 95Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 100 Hz;
when the ambient temperature is higher than-8 ℃ and lower than or equal to 12 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 80Hz-90Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 85Hz-95 Hz;
when the ambient temperature is higher than 12 ℃ and lower than or equal to 40 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 65Hz-75Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 70Hz-80 Hz;
and S22, operating the compressor for 2S-5S.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, in step S3: delta Ts is the preset water temperature-the inlet water temperature of the circulating water.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, in step S3: delta Tw is the current circulating water inlet temperature-the last circulating water inlet temperature.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, the step S3 specifically includes:
when the delta Ts is less than or equal to-4 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is less than or equal to-3 and more than-7, and if the delta Tw is more than 0 ℃, the delta f is less than or equal to-8 and more than-10;
when the temperature is higher than minus 4 ℃ and is less than or equal to 0 ℃, if the temperature is less than or equal to 0 ℃, the temperature is more than or equal to minus 6 and is less than or equal to 3, and if the temperature is more than 0 ℃, the temperature is more than or equal to minus 10 and is less than or equal to minus 5;
when the delta Ts is more than 0 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is more than or equal to 1 and less than or equal to 5, and if the delta Tw is more than 0 ℃, the delta f is more than or equal to-4 and less than or equal to 2.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, after the step S4, the method further includes:
and S5, adjusting the target frequency F of the compressor once every 5-60S.
As a preferable technical scheme of the adjusting control method of the variable-frequency compressor of the air-source heat pump, the target frequency F of the compressor is adjusted once every 30s or 60 s.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, before the step S1, the method further includes:
s01, starting a water pump;
and S02, starting the fan.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, after the step S02, the method further includes: s03, starting the electronic expansion valve;
the air source heat pump variable frequency compressor adjusting control method is characterized in that the fan is started after the water pump runs for 20s, and the compressor and the electronic expansion valve are started simultaneously after the fan runs for 15 s.
The invention has the beneficial effects that:
the invention provides a method for adjusting and controlling a variable-frequency compressor of an air-source heat pump, which comprises the steps of firstly adjusting the frequency of the compressor according to the ambient temperature and the preset water temperature, then analyzing the frequency adjustment quantity delta F of the compressor according to the difference value delta Ts between the preset water temperature and the actually measured water temperature change rate delta Tw, and further adjusting the frequency of the compressor according to the delta F until the frequency of the compressor is adjusted to the target frequency F. In general, the invention can pre-adjust the compressor according to the environment temperature and the preset water temperature, and then accurately adjust the compressor according to the delta Ts and the delta Tw, thereby improving the accurate control of the frequency of the compressor and reducing the energy waste.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for controlling the modulation of an inverter compressor of an air-source heat pump according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The embodiment of the invention discloses a method for adjusting and controlling a variable-frequency compressor of an air-source heat pump, which is used for heating circulating water to a preset water temperature. As shown in fig. 1, the method for controlling the modulation of the inverter compressor of the air-source heat pump comprises the following steps:
s1, starting the compressor;
s2, adjusting the frequency of the compressor according to the environment temperature and the preset water temperature;
s3, analyzing according to the difference value delta Ts between the preset water temperature and the actually measured water temperature change rate delta Tw to obtain the frequency adjustment quantity delta f of the compressor;
s4, adjusting the frequency of the compressor according to the delta f, and calculating the formula: f ═ Fc + Δf; the target frequency of the F-compressor, the current operating frequency of the Fc-compressor, Δ F-the frequency adjustment of the compressor.
The invention can pre-adjust the compressor according to the environment temperature and the preset water temperature, and then accurately adjust the compressor according to the delta Ts and the delta Tw, thereby improving the accurate control of the frequency of the compressor and reducing the energy waste.
Specifically, step S1 includes:
s11, starting the compressor;
s12, raising the frequency of the compressor to 50 Hz;
and S13, operating the compressor for 3-5 min.
The frequency of the compressor is increased to 50Hz and then the compressor is operated for 3min to 5min, so that the frequency of the compressor is adjusted after the compressor is stably operated, and the operation reliability of the compressor is improved. In this embodiment, the next operation can be performed after the compressor is smoothly operated for 3min, and in other embodiments, the operation time of the compressor may be set as required, for example, 4min or 5min, but is not limited in this embodiment.
Further, before step S1, the method further includes:
s01, starting a water pump;
and S02, starting the fan.
According to the setting, start water pump and fan before the compressor is opened to reduce the compressor energy consumption as far as possible, open the fan simultaneously and cool down for the evaporimeter, ensure its normal performance.
Meanwhile, after step S02, the method further includes: and S03, starting the electronic expansion valve to release the pressure of the air after heat exchange, reducing energy consumption and ensuring the safety of the whole system.
Specifically, the fan is started after the water pump is operated for 20s to ensure that the fan operates stably, and the compressor and the electronic expansion valve are started simultaneously after the fan operates for 15s to ensure that the fan operates normally. In other embodiments, the running time of the water pump and the fan can be set according to the requirement, and the operation is not limited to this embodiment.
As a preferable technical solution of the method for controlling the modulation of the inverter compressor of the air-source heat pump, step S2 includes:
s21, when the ambient temperature is lower than or equal to minus 8 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 95Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 100 Hz;
when the ambient temperature is higher than-8 ℃ and lower than or equal to 12 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 80Hz-90Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 85Hz-95 Hz;
when the ambient temperature is higher than 12 ℃ and lower than or equal to 40 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 65Hz-75Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 70Hz-80 Hz;
and S22, operating the compressor for 2S-5S.
Illustratively, when the ambient temperature is greater than-8 ℃ and less than or equal to 12 ℃, if the preset water temperature is greater than or equal to 45 ℃, the frequency of the compressor can be adjusted to 80Hz, 85Hz or 90Hz, and if the preset water temperature is less than 45 ℃, the frequency of the compressor can be adjusted to 85Hz, 90Hz or 95 Hz;
when the ambient temperature is higher than 12 ℃ and lower than or equal to 40 ℃, if the preset water temperature is higher than or equal to 45 ℃, the frequency of the compressor can be adjusted to 65Hz, 70Hz or 75Hz, and if the preset water temperature is lower than 45 ℃, the frequency of the compressor can be adjusted to 70Hz, 75Hz or 80 Hz.
It should be noted that the specific value of the frequency adjustment of the compressor may be set as needed as long as the above condition is satisfied.
After the frequency of the compressor is adjusted, the compressor is operated for 2s-5s, and then the next operation is carried out, so that the compressor can be stably operated, and the operation time of the compressor can be reduced as much as possible.
In this embodiment, in step S3: the delta Ts is a preset water temperature-circulating water inlet temperature, namely the delta Ts is a positive value in the heating mode, and the delta Ts is a negative value in the cooling mode. Further, Δ Tw is equal to the current circulating water inlet temperature — the last circulating water inlet temperature, that is, Δ Tw is a positive value in the heating mode, and Δ Tw is a negative value in the cooling mode. According to the arrangement, by observing the values of the delta Ts and the delta Tw, whether the compressor should be down-converted or up-converted can be preliminarily judged. Here, if Δ f is a negative value, it is described that the compressor needs to be down-converted, and if Δ f is a positive value, it is described that the compressor needs to be up-converted.
Specifically, step S3 specifically includes:
when the delta Ts is less than or equal to-4 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is less than or equal to-3 and more than-7, and if the delta Tw is more than 0 ℃, the delta f is less than or equal to-8 and more than-10;
when the temperature is higher than minus 4 ℃ and is less than or equal to 0 ℃, if the temperature is less than or equal to 0 ℃, the temperature is more than or equal to minus 6 and is less than or equal to 3, and if the temperature is more than 0 ℃, the temperature is more than or equal to minus 10 and is less than or equal to minus 5;
when the delta Ts is more than 0 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is more than or equal to 1 and less than or equal to 5, and if the delta Tw is more than 0 ℃, the delta f is more than or equal to-4 and less than or equal to 2.
Illustratively, Δ f is given by the following table 1 with reference to the range of Δ Ts and Δ Tw.
TABLE 1
Through the table 1, relevant personnel can be well guided to analyze the values of the delta Ts and the delta Tw and correspondingly find out the value of the frequency adjustment quantity delta f of the compressor, so that the frequency of the compressor can be adjusted. In addition, as shown in step S2, the initial value of the current operating frequency Fc of the compressor is the frequency of the compressor adjusted according to the ambient temperature and the preset water temperature, and then the down-conversion or up-conversion operation is performed on the basis of the current operating frequency Fc of the compressor until the circulating water is heated or cooled to the preset water temperature.
Further, after step S4, the method further includes:
and S5, adjusting the target frequency F of the compressor once every 5-60S. In this embodiment, the target frequency F of the compressor is adjusted once every 30s or 60s, thereby gradually adjusting the frequency of the compressor. In other embodiments, the interval time may be adjusted as needed, and is not limited to the present embodiment.
In summary, the embodiment of the present invention provides a method for controlling the adjustment of a variable frequency compressor of an air energy heat pump, which includes adjusting the frequency of the compressor according to an ambient temperature and a preset water temperature, analyzing a frequency adjustment quantity Δ F of the compressor according to a difference Δ Ts between the preset water temperature and an actually measured water temperature and a change rate Δ Tw of the actually measured water temperature, and further adjusting the frequency of the compressor according to the Δ F until the frequency of the compressor is adjusted to a target frequency F. In general, the invention can pre-adjust the compressor according to the environment temperature and the preset water temperature, and then accurately adjust the compressor according to the delta Ts and the delta Tw, thereby improving the accurate control of the frequency of the compressor and reducing the energy waste.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (11)
1. A method for controlling the modulation of a variable frequency compressor of an air-source heat pump is used for heating circulating water to a preset water temperature, and is characterized by comprising the following steps:
s1, starting the compressor;
s2, adjusting the frequency of the compressor according to the environment temperature and the preset water temperature;
s3, analyzing according to the difference value delta Ts between the preset water temperature and the actually measured water temperature change rate delta Tw to obtain the frequency adjustment quantity delta f of the compressor;
s4, adjusting the frequency of the compressor according to delta f, and calculating the formula: f ═ Fc + Δf; f-the target frequency of the compressor, Fc-the current operating frequency of the compressor, af-the frequency adjustment of the compressor.
2. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, wherein the step S1 comprises:
s11, starting the compressor;
s12, raising the frequency of the compressor to 50 Hz;
and S13, operating the compressor for 3-5 min.
3. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 2, wherein the step S2 comprises:
s21, when the ambient temperature is lower than or equal to minus 8 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 95Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 100 Hz;
when the ambient temperature is higher than-8 ℃ and lower than or equal to 12 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 80Hz-90Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 85Hz-95 Hz;
when the ambient temperature is higher than 12 ℃ and lower than or equal to 40 ℃, if the preset water temperature is higher than or equal to 45 ℃, adjusting the frequency of the compressor to 65Hz-75Hz, and if the preset water temperature is lower than 45 ℃, adjusting the frequency of the compressor to 70Hz-80 Hz;
and S22, operating the compressor for 2S-5S.
4. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, wherein in step S3: delta Ts is the preset water temperature-the inlet water temperature of the circulating water.
5. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, wherein in step S3: delta Tw is the current circulating water inlet temperature-the last circulating water inlet temperature.
6. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, wherein the step S3 specifically comprises:
when the delta Ts is less than or equal to-4 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is less than or equal to-3 and more than-7, and if the delta Tw is more than 0 ℃, the delta f is less than or equal to-8 and more than-10;
when the temperature is higher than minus 4 ℃ and is less than or equal to 0 ℃, if the temperature is less than or equal to 0 ℃, the temperature is more than or equal to minus 6 and is less than or equal to 3, and if the temperature is more than 0 ℃, the temperature is more than or equal to minus 10 and is less than or equal to minus 5;
when the delta Ts is more than 0 ℃, if the delta Tw is less than or equal to 0 ℃, the delta f is more than or equal to 1 and less than or equal to 5, and if the delta Tw is more than 0 ℃, the delta f is more than or equal to-4 and less than or equal to 2.
7. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, further comprising, after the step S4:
and S5, adjusting the target frequency F of the compressor once every 5-60S.
8. The method of claim 7, wherein the target frequency F of the compressor is adjusted once every 30s or 60 s.
9. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 1, further comprising, before the step S1:
s01, starting a water pump;
and S02, starting the fan.
10. The method for controlling the modulation of the inverter compressor of the air-source heat pump according to claim 9, further comprising, after the step S02: and S03, starting the electronic expansion valve.
11. The method according to claim 10, wherein the blower is started after the water pump is operated for 20s, and the compressor and the electronic expansion valve are simultaneously started after the blower is operated for 15 s.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114739013A (en) * | 2022-04-26 | 2022-07-12 | 浙江中广电器集团股份有限公司 | Variable frequency control method of heat pump water heater and variable frequency water heater system |
| CN114739013B (en) * | 2022-04-26 | 2023-11-14 | 浙江中广电器集团股份有限公司 | Variable frequency control method of heat pump water heater and variable frequency water heater system |
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Application publication date: 20211119 |