CN113757844A - Heat pump unit suitable for air source and refrigeration control method thereof - Google Patents
Heat pump unit suitable for air source and refrigeration control method thereof Download PDFInfo
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- CN113757844A CN113757844A CN202110970103.0A CN202110970103A CN113757844A CN 113757844 A CN113757844 A CN 113757844A CN 202110970103 A CN202110970103 A CN 202110970103A CN 113757844 A CN113757844 A CN 113757844A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 27
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a heat pump unit suitable for an air source and a refrigeration control method thereof, wherein the heat pump unit comprises a compressor, a four-way reversing valve, a finned heat exchanger, a fan, an electronic expansion valve, a water path heat exchanger and a gas-liquid separator, wherein the compressor is connected with a D interface of the four-way reversing valve; still be equipped with temperature sensor and pressure sensor, the fan is direct current variable speed fan, and this technical scheme can be according to the change of temperature, adjustment fan operation rotational speed, and output as required ensures the unit steady operation, avoids the unit to frequently open and stop, extension unit life.
Description
Technical Field
The invention relates to the technical field of heat pump refrigeration, in particular to a heat pump unit suitable for an air source and a refrigeration control method thereof.
Background
Most of heat pump (cold water) units in the current market adopt alternating-current constant-speed fans, and the rotating speed of the fans cannot be adjusted; when the unit operates in a refrigerating mode and the outdoor environment temperature range is large, the following problems exist:
1. when the low-ring-temperature refrigeration is carried out, the indoor required cold quantity is less, if the fan still runs at high-speed wind, the output capacity of the unit is far greater than the indoor requirement, and the unit is frequently started and stopped;
2. during ultra-high temperature refrigeration, the high-speed wind running speed of the fan still cannot meet the requirement, so that the running load of the unit becomes large, the exhaust temperature and the exhaust pressure are increased, and the unit performance and the service life of the unit are influenced after long-term running.
Disclosure of Invention
In order to solve the above problems, the present invention aims to overcome the disadvantages of the prior art, and provides a heat pump unit suitable for an air source and a refrigeration control method thereof; the control method can adjust the running rotating speed of the fan according to the change of the temperature, output the fan according to the requirement, ensure the stable running of the unit, avoid the frequent start and stop of the unit and prolong the service life of the unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a refrigeration control method of a heat pump unit suitable for an air source comprises a compressor, a four-way reversing valve, a finned heat exchanger, a fan, an electronic expansion valve, a water path heat exchanger and a gas-liquid separator, wherein the compressor is connected with a D interface of the four-way reversing valve;
the fan is a direct-current variable-speed fan, the temperature sensor is used for acquiring the ambient temperature Thj, and the pressure sensor is arranged between the four-way reversing valve and the finned heat exchanger and used for acquiring the pressure at the finned heat exchanger;
starting the unit in a refrigeration mode, and after 5s, operating the fan at the initial operation speed for 5 min;
then the fan is switched from the initial running rotating speed to the normal running rotating speed to run;
the initial operation rotating speed of the fan is determined according to the environment temperature Thj obtained by the temperature sensor, and the normal operation rotating speed of the fan is determined according to the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor.
Preferably, when the saturated condensing temperature Tbh corresponding to the pressure acquired by the pressure sensor is less than 30 ℃, the rotating speed of the fan is reduced by 1 level every 2min until Tbh ℃ is more than or equal to 30 ℃ and the rotating speed of the fan reaches the lowest level.
Preferably, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor is greater than or equal to 30 ℃ and Tbh is less than or equal to 42 ℃, the current rotating speed of the fan is kept unchanged.
Preferably, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor is greater than 42 ℃ and Tbh is less than or equal to 50 ℃, the rotating speed of the fan is increased by 1 level every 2min until Tbh is less than or equal to 42 ℃ and the rotating speed of the fan reaches the second high level.
Preferably, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor is higher than 50 ℃ and Tbh-Thj is less than or equal to 10 ℃, the fan is forced to operate according to the rotating speed of the second high level.
Preferably, when the saturated condensing temperature Tbh corresponding to the pressure acquired by the pressure sensor is higher than 50 ℃ and Tbh-Thj is higher than 10 ℃, the fan is forced to operate at the highest-level rotating speed.
Preferably, the pressure sensor is arranged at an inlet of the finned heat exchanger.
Preferably, the temperature sensor is arranged within 1 meter around the fan.
A heat pump unit suitable for an air source adopts the refrigeration control method of the heat pump unit suitable for the air source according to the right.
The invention has the beneficial effects that: the invention can adjust the running rotating speed of the fan according to the change of temperature, output the fan according to the requirement, ensure the stable running of the unit, avoid the frequent start and stop of the unit and prolong the service life of the unit.
Drawings
FIG. 1 is a schematic view of a heat pump unit according to the present invention;
FIG. 2 is a schematic diagram of a refrigeration control method of a heat pump unit according to the present invention.
Description of reference numerals: 1. a compressor; 2. a four-way reversing valve; 3. a finned heat exchanger; 4. a fan; 5. an electronic expansion valve; 6. a waterway heat exchanger; 7. a pressure sensor; 8. a temperature sensor; 9. a gas-liquid separator.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, 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, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 first embodiment is as follows: the heat pump unit suitable for the air source as shown in fig. 1 comprises a compressor 1, a four-way reversing valve 2, a finned heat exchanger 3, a fan 4, an electronic expansion valve 5, a water path heat exchanger 6 and a gas-liquid separator 9, wherein the compressor 1 is connected with a D interface of the four-way reversing valve 2, an E interface, an S interface and a C interface of the four-way reversing valve 2 are respectively communicated with the finned heat exchanger 3, the gas-liquid separator 9 and the water path heat exchanger 6, the gas-liquid separator 9 is connected with the compressor 1, the water path heat exchanger 6 is connected with the finned heat exchanger 3, the electronic expansion valve 5 is positioned between the water path heat exchanger 6 and the finned heat exchanger 3, and the fan 4 is positioned on one side of the finned heat exchanger 3 and is communicated with an air channel of the finned heat exchanger 3; therefore, the disturbance of the air around the unit can be increased, and the heat exchange efficiency of the fin type heat exchanger 3 is improved.
In the embodiment of the invention, a temperature sensor 8 and a pressure sensor 7 are further provided, the fan 4 is a direct-current variable speed fan 4, the temperature sensor 8 is used for acquiring an ambient temperature Thj, and the pressure sensor 7 is arranged between the four-way reversing valve 2 and the finned heat exchanger 3 and is used for acquiring the pressure at the finned heat exchanger 3;
starting the unit in a refrigeration mode, and after 5s, operating the fan 4 at the initial operation speed for 5 min;
then the fan 4 is switched to the normal operation speed from the initial operation speed;
the initial operation speed of the fan 4 is determined according to the ambient temperature Thj obtained by the temperature sensor 8, and the normal operation speed of the fan 4 is determined according to the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7.
This is so arranged because it is more accurate to select the ambient temperature Thj detected by the temperature sensor 8 at the time of start-up, and it is more accurate to select the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7 as the control point of the rotation speed of the fan 4 after the fan 4 has been operated for a certain period of time.
It is worth mentioning here that the fan 4 is operated at a second high level of speed when the pressure sensor 7 fails.
In the embodiment of the present invention, after the fan 4 operates for 5min according to the initial operating speed, the normal operating speed of the fan 4 is determined by the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7.
In the embodiment of the present invention, the temperature sensor 8 is disposed within 1 meter around the fan 4.
In the embodiment of the invention, the pressure sensor 7 is arranged at the inlet of the finned temperature sensor 8, so that the pressure of the high-pressure end of the finned heat exchanger 3 can be obtained, and the control on the rotating speed of the fan 4 is more accurate.
In the embodiment of the invention, the fans have 9-level rotating speeds, the rotating speed range of the fan 4 is 300-1000rps, and the rotating speed of the fan 4 is switched according to the saturated condensing temperature Tbh corresponding to the pressure acquired by the pressure sensor 7.
Further preferably, the fan 4 operates for at least 1min at each stage of rotation speed. So set up, can ensure fan 4 steady operation.
Further preferably, the rotation speed of each stage of the fan 4 is preferably as follows:
| number of | Level | 1 | 2 | Grade | 3 | 4 | Grade | 5 | |
|
|
|
| Rotation speed Sn | 300 | 400 | 450 | 500 | 550 | 650 | 700 | 800 | 1000 |
It should be noted that, in the embodiment of the present invention, the parameter corresponding to each stage of the fan 4 is only used as a reference, in other embodiments, the parameter corresponding to each stage of the fan 4 may also be another parameter, and the total number of stages of the fan 4 may also be changed.
In the embodiment of the present invention, the initial operating speed of the fan 4 determined according to the ambient temperature detected by the pressure sensor 8 is preferably as follows:
| ambient temperature (Thj) | Thj<15℃ | 15℃≤Thj<25℃ | 25℃≤Thj<35℃ | Thj≥35℃ | ||
| Rotation | Grade | 3 | 4 | Grade | 5 | |
A refrigeration control method of a heat pump unit suitable for an air source is shown in figure 2 and comprises the following specific steps:
starting the unit in a refrigeration mode, and after 5s, operating the fan 4 at the initial operation speed for 5 min; then, the fan 4 is switched to operate at a normal operation speed from the initial operation speed, wherein the initial operation speed of the fan 4 is determined according to the ambient temperature Thj measured by the temperature sensor 8, and the normal operation speed of the fan 4 is determined according to the saturated condensation temperature Tbh corresponding to the pressure obtained by the pressure sensor 7;
in the embodiment of the invention, when the saturated condensing temperature Tbh corresponding to the pressure intensity obtained by the pressure sensor 7 is less than 30 ℃, the rotating speed of the fan 4 is reduced by 1 level every 2min until Tbh ℃ is more than or equal to 30 ℃ or the rotating speed of the fan 4 reaches 1 level; therefore, in the process, the high-pressure saturated condensing temperature Tbh gradually changes from low to high, after the high-pressure saturated condensing temperature Tbh rises to a certain temperature, the rotating speed of the fan 4 is kept unchanged, then the rotating speed of the fan 4 is gradually increased, and further the heat release efficiency of the fin heat exchanger is increased.
In the embodiment of the invention, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7 is greater than or equal to 30 ℃ and Tbh is less than or equal to 42 ℃, the current rotating speed of the fan 4 is kept unchanged. Therefore, in the process, the rotating speed of the fan 4 is kept unchanged, and the stable operation of the unit is ensured.
In the embodiment of the invention, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7 is higher than 42 ℃ and Tbh is lower than or equal to 50 ℃, the rotating speed of the fan 4 is increased by 1 level every 2min until Tbh is lower than or equal to 42 ℃ and the fan 4 reaches 8 levels of rotating speed; therefore, in the process, the high-pressure saturated condensing temperature Tbh gradually changes from high to low, after the high-pressure saturated condensing temperature Tbh is reduced to 42 ℃, the rotating speed of the fan 4 is kept unchanged, then the rotating speed of the fan 4 is gradually reduced, the running power of the whole machine is reduced, and energy is saved.
In the embodiment of the invention, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7 is higher than 50 ℃ and Tbh-Thj is less than or equal to 10 ℃, the fan 4 is forced to operate at 8-level rotating speed, at the moment, the outdoor ring temperature Thj is higher, the heat exchange efficiency of the fin heat exchanger is low, and therefore, the air disturbance needs to be accelerated by increasing the rotating speed of the fan 4, and the heat exchange efficiency of the fin heat exchanger is increased.
In the embodiment of the invention, when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor 7 is higher than 50 ℃ and Tbh-Thj is higher than 10 ℃, the fan 4 is forced to operate at the highest-level rotating speed. At this moment, the outdoor environment temperature Thj is high, the high-pressure saturated condensation temperature Tbh is much higher than the outdoor environment temperature Thj, the heat exchange efficiency of the fin heat exchanger is low, the rotating speed of the fan 4 needs to be forcibly operated to the highest rotating speed of 9 levels, and then the high-pressure fault reported by the heat pump unit is effectively prevented.
In the embodiment of the invention, when the unit compressor 1 stops, the fan 4 operates at the current rotating speed, and stops after delaying for 1 min.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A refrigeration control method of a heat pump unit suitable for an air source comprises a compressor (1), a four-way reversing valve (2), a finned heat exchanger (3), a fan (4), an electronic expansion valve (5), a waterway heat exchanger (6) and a gas-liquid separator (9), the compressor (1) is connected with a D interface of the four-way reversing valve (2), an E interface, an S interface and a C interface of the four-way reversing valve (2) are respectively communicated with the fin type heat exchanger (3), the gas-liquid separator (9) and the waterway heat exchanger (6), the gas-liquid separator (9) is connected with the compressor (1), the waterway heat exchanger (6) is connected with the finned heat exchanger (3), the electronic expansion valve (5) is positioned between the waterway heat exchanger (6) and the finned heat exchanger (3), the fan (4) is positioned at one side of the finned heat exchanger (3) and is communicated with an air channel of the finned heat exchanger (3);
the fan (4) is a direct-current variable speed fan (4), the temperature sensor (8) is used for acquiring the ambient temperature Thj, and the pressure sensor (7) is arranged between the four-way reversing valve (2) and the finned heat exchanger (3) and used for acquiring the pressure intensity of the finned heat exchanger (3);
starting the unit in a refrigeration mode, and operating the fan (4) at the initial operation speed after 5s and maintaining for 5 min;
then the fan (4) is switched to the normal operation speed from the initial operation speed;
the initial operation rotating speed of the fan (4) is determined according to the environment temperature Thj acquired by the temperature sensor (8), and the normal operation rotating speed of the fan (4) is determined according to the saturated condensation temperature Tbh corresponding to the pressure acquired by the pressure sensor (7).
2. The refrigeration control method of the heat pump unit suitable for the air source according to the claim 1, characterized in that when the pressure obtained by the pressure sensor (7) corresponds to the saturated condensing temperature Tbh < 30 ℃, the rotation speed of the fan (4) is reduced by 1 level every 2min until Tbh ≥ 30 ℃ stops or the rotation speed of the fan (4) reaches the lowest level.
3. The refrigeration control method of the heat pump unit suitable for the air source according to claim 1, characterized in that when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor (7) is greater than or equal to 30 ℃ and Tbh is less than or equal to 42 ℃, the current rotation speed of the fan (4) is kept unchanged.
4. The refrigeration control method of the heat pump unit suitable for the air source according to the claim 1, characterized in that when the pressure obtained by the pressure sensor (7) corresponds to the saturated condensing temperature Tbh > 42 ℃ and Tbh ≤ 50 ℃, the rotation speed of the fan (4) is increased by 1 level every 2min until Tbh ≤ 42 ℃ is stopped or the rotation speed of the fan (4) reaches the second level.
5. The refrigeration control method of the heat pump unit suitable for the air source according to claim 1, characterized in that when the saturated condensing temperature Tbh corresponding to the pressure obtained by the pressure sensor (7) is higher than 50 ℃ and Tbh-Thj is less than or equal to 10 ℃, the fan (4) is forced to operate according to the rotation speed of the second high level.
6. The refrigeration control method of a heat pump unit suitable for an air source according to claim 1, characterized in that when the pressure obtained by the pressure sensor (7) corresponds to a saturated condensing temperature Tbh > 50 ℃ and Tbh-Thj > 10 ℃, the fan (4) is forced to operate at the highest level of rotation speed.
7. The refrigeration control method of a heat pump unit suitable for an air source according to claim 1, characterized in that the pressure sensor (7) is arranged at the inlet of the finned heat exchanger (3).
8. The refrigeration control method of a heat pump unit suitable for an air source according to claim 1, characterized in that the temperature sensor (8) is arranged within 1 meter around the fan (4).
9. The refrigeration control method of a heat pump unit suitable for an air source according to claim 1, characterized in that when the pressure sensor (7) is out of order, the fan (4) is operated at the second highest level of rotation speed.
10. A heat pump system suitable for an air source, characterized in that, a refrigeration control method of a heat pump unit suitable for an air source according to any one of claims 1 to 9 is adopted.
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| CN202110970103.0A CN113757844A (en) | 2021-08-23 | 2021-08-23 | Heat pump unit suitable for air source and refrigeration control method thereof |
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| CN202110970103.0A CN113757844A (en) | 2021-08-23 | 2021-08-23 | Heat pump unit suitable for air source and refrigeration control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116878179A (en) * | 2023-09-01 | 2023-10-13 | 北京金盛通科技发展有限责任公司 | Efficient refrigeration method and system for air cooling unit |
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| CN202835950U (en) * | 2012-10-10 | 2013-03-27 | 南京天加空调设备有限公司 | Air source heat pump water chilling unit provided with all-season refrigeration function |
| CN103968511A (en) * | 2013-01-30 | 2014-08-06 | 同方人工环境有限公司 | Air source heat pump unit for annual refrigeration by frequency conversion stepless regulation of condensation fans |
| CN107917523A (en) * | 2017-10-25 | 2018-04-17 | 西安交通大学 | A kind of outdoor heat exchanger for heat pump and its control method |
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| CN116878179A (en) * | 2023-09-01 | 2023-10-13 | 北京金盛通科技发展有限责任公司 | Efficient refrigeration method and system for air cooling unit |
| CN116878179B (en) * | 2023-09-01 | 2023-12-05 | 北京金盛通科技发展有限责任公司 | Efficient refrigeration method and system for air cooling unit |
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Application publication date: 20211207 |