CN101221007A - Air source heat pump hot water units - Google Patents

Air source heat pump hot water units Download PDF

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Publication number
CN101221007A
CN101221007A CNA2007100132072A CN200710013207A CN101221007A CN 101221007 A CN101221007 A CN 101221007A CN A2007100132072 A CNA2007100132072 A CN A2007100132072A CN 200710013207 A CN200710013207 A CN 200710013207A CN 101221007 A CN101221007 A CN 101221007A
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hot water
air
heat exchanger
temperature
controller
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CNA2007100132072A
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CN101221007B (en
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沙凤歧
葛建民
赵铁军
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SHANDONG COOLING ENERGY SAVING EQUIPMENT CO., LTD.
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葛建民
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Abstract

The invention discloses an air supply heat pump hot water assembly. The key points of the invention mainly are that at least two compressors are connected in parallel; a first temperature sensor, a pressure sensor and a first controller are also connected in parallel; a first control circuit which compares the temperature signal measured by the first temperature sensor with a set value of environment temperature and leads the corresponding compressor to enter an on state according to the comparison result is arranged on the first controller, and a second control circuit which compares the pressure signal measured by the pressure sensor with a set value of pressure and controls the rotate speed of a fan according to the comparison result is also arranged on the first controller. The invention fundamentally solves the problem that the hot water quantity required by users is not matched with the heating capacity of the assembly when running in winter and summer, and the invention can guarantee the safe and reliable running of the compressor through changing the air flow of the fan. Furthermore, the invention additionally adopts a connecting air channel and a cold water circulation device to recycle the cooling energy wasted before, so as to enhance the utilization rate of the hot water assembly and reduce the energy cost of users.

Description

The air-source heat pump hot water group
Technical field
The present invention relates to the air source heat pump technical field, relate in particular to a kind of hot water unit that heats water with air source heat pump.
Background technology
Air source heat pump is a kind ofly can obtain low grade heat energy from natural air, through the electric power acting, is output as the equipment of the high-grade heat energy that can use.The Carnot cycle principle is adopted in its work, and the concrete course of work is: the gaseous state refrigeration working medium of discharging HTHP after the compressor operating; The gaseous state refrigeration working medium of this HTHP after cross valve enters the condenser release heat, the liquid of warm high pressure in becoming; The liquid refrigerating working medium of warm high pressure becomes the liquid of low-temp low-pressure through the throttling step-down of device for drying and filtering, liquid-sighting glass and expansion valve in being somebody's turn to do, and evaporates by absorbing airborne heat in evaporimeter through liquid-dividing head again, becomes the gas of low-temp low-pressure; The gas refrigeration working medium of this low-temp low-pressure flows back to the compressor air suction mouth, finishes a working cycles.
Known air source heat pump, its refrigeration working medium need carry out forced heat-exchanging by blower fan in the process of evaporimeter of flowing through.Because the air quantity of the wind field that blower fan produces immobilizes, when summer, outdoor environment temperature was higher, evaporating temperature and evaporating pressure when refrigeration working medium evaporates in evaporimeter are all higher, are easy to exceed the normal range of operation of compressor, bring potential safety hazard for the normal operation of compressor; And when winter, outdoor environment temperature was low, evaporating temperature and evaporating pressure were lower again when refrigeration working medium evaporated in evaporimeter, and the heating capacity of compressor is also low.On the other hand, if environment temperature is low excessively, the refrigeration working medium in the evaporimeter can not get sufficient evaporation, when being inhaled into compressor, is easy to generate the liquid hammer accident, and causes component wear and aging.
The air-source heat pump hot water group is when summer operation, because outdoor environment temperature is higher, and the pressure of inspiration(Pi) height of compressor, the heating capacity of unit is big, and the hot water amount that summer, the user needed is few than winter, causes the idle of compressor compresses ability; When moving in the winter time, because outdoor environment temperature is lower, the pressure of inspiration(Pi) of compressor is low, and the heating capacity of unit is little, and the hot water amount that winter, the user needed is many than summer, and this moment, the problem that can not meet consumers' demand appearred again in the compressed capability of compressor.For solving this contradiction, common air-source heat pump hot water group adopts the mode that increases electric heating device in addition usually, when promptly the unit heating capacity is not enough in the winter time, solves by the way of opening electric heating device.But electric heating device efficient is low, wastes energy, and is also uneconomical concerning the user.
The air-source heat pump hot water group is to produce the equipment of hot water by absorbing airborne heat.Unit as drive energy, adopts contrary Carnot cycle principle with electric energy, and heat energy in air is collected, and together arranges to required hot water together with the heat energy that drives the electric energy conversion, and the temperature of hot water is raise, and reaches the required requirement of user.As from the foregoing, unit will inevitably make the temperature of air reduce in the process that absorbs the air heat, produces the air that is lower than environment temperature, and common air-source heat pump hot water group all is that this part cold air is directly arranged space towards periphery usually, has wasted.
Summary of the invention
Technical problem to be solved by this invention is: a kind of air-source heat pump hot water group is provided, during with solution winter, summer operation, the hot water amount that the user needs and the unmatched problem of heating capacity of unit, this hot water generatine set heat efficiency height, use cost is low, and is safe and reliable to operation.
For solving the problems of the technologies described above, technical scheme of the present invention is: the air-source heat pump hot water group, comprise the gas compression unit, with first heat exchanger that can carry out heat exchange with outdoor air, with the blower fan that can around the heat exchange surface of described first heat exchanger, produce wind field, with second heat exchanger that can carry out heat exchange with user's hot water, with the hot water circulating device that is connected with described second heat exchanger, described gas compression unit, first heat exchanger and second heat exchanger correspondingly link together by cross valve, described air compression unit comprises two compressors at least, and the air intake duct of described these compressors and blast pipe are in parallel respectively; It also comprises first temperature sensor of detectable environment temperature and the pressure sensor and first controller of detectable compressor air suction pressure; The input of described first controller is electrically connected with first temperature sensor and pressure sensor respectively, the output of described first controller is electrically connected with blower fan and compressor respectively, described first controller is provided with the temperature signal that first temperature sensor can be detected and the environment temperature setting value compares and make corresponding compressor enter the first control circuit and the pressure signal that pressure sensor can be detected of opening and pressure set points compares and according to the second control circuit of comparative result system control rotation speed of fan according to comparative result.
As a kind of improvement, it also comprises new bellows, and is connected the air channel between the air outlet of the air inlet that is removably connected to described new bellows and described first heat exchanger; With with described second heat exchanger cooling water circulating device that be connected and in parallel with described hot water circulating device, with second temperature sensor that can detect hot water temperature in the described hot water circulating device and the temperature signal that second temperature sensor can be detected and hot water temperature's setting value compares and select second controller of connecting another disconnection in hot water circulating device and the cooling water circulating device according to comparative result.
After having adopted technique scheme, the invention has the beneficial effects as follows: because described air compression unit comprises two compressors at least, the air intake duct of described these compressors and blast pipe are in parallel respectively; It also comprises first temperature sensor and first controller of detectable environment temperature; Described first controller is provided with the temperature signal that first temperature sensor can be detected and the environment temperature setting value compares and make corresponding compressor enter the first control circuit of opening according to comparative result, so this hot water unit is when using summer, if environment temperature is higher than desired temperature, the first control circuit of first controller compares temperature signal and the environment temperature setting value that first temperature sensor detects, and make the few relatively compressor of platform number enter opening according to comparative result, thereby reduced the compressed capability of whole gas compression unit, adapted to user summer with the few demand of hot water; When using in the winter time, if environment temperature is lower than the environment temperature setting value, the first control circuit of first controller will be according to comparative result, make the many relatively compressors of platform number enter opening, thereby increased the compressed capability of whole gas compression unit, adapted to the user and used the many demands of heat winter.It does not need additionally to increase electric heating device, thermal efficiency height, and reduced user's use cost.
Moreover, because it also is provided with the pressure sensor of detectable compressor air suction pressure, with the pressure signal that pressure sensor can be detected and pressure set points compares and according to the second control circuit of comparative result system control rotation speed of fan, so it is too high to work as ambient temperature, cause evaporating temperature too high and when making compressor air suction pressure surpass the higher limit of setting pressure, first controller will reduce the rotating speed of blower fan by second control circuit, thereby reduce the heat that refrigeration working medium absorbs from air, and then the evaporating pressure when reducing refrigeration working medium and in first heat exchanger, evaporate, the normal operation of assurance compressor; When compressor air suction pressure is lower than the lower limit of setting pressure, first heat exchanger will improve the rotating speed of blower fan by second control circuit, thereby increase the heat that refrigeration working medium absorbs from air, and then the evaporating pressure when improving refrigeration working medium and in first heat exchanger, evaporating, refrigeration working medium is fully evaporated, improve the heating capacity of compressor.Therefore, no matter summer or winter, compressor can both safe and reliable operation under a metastable temperature environment.
Because this hot water unit also is provided with new bellows, and be connected the air channel between the air outlet of the air inlet that is removably connected to described new bellows and described first heat exchanger; Be connected with described second heat exchanger, and the cooling water circulating device in parallel with described hot water circulating device, with second temperature sensor that can detect hot water temperature in the described hot water circulating device, compare with the temperature signal that second temperature sensor can be detected and hot water temperature's setting value, and select one in hot water circulating device and the cooling water circulating device to connect and second controller of another disconnection according to comparative result, so behind the heat exchange surface of air through first heat exchanger, heat is absorbed into and is cold wind, cold wind is through connecting the air channel, import new bellows, can be cooling for user's summer air-conditioning.When the hot water temperature who detects when second temperature sensor is higher than the hot water temperature and sets value, second controller sends the peripheral passage that hot water circulating device is cut off in instruction, open the peripheral passage of cooling water circulating device simultaneously, make the condensation temperature of refrigeration working medium in second heat exchanger be unlikely the condensation temperature that allows above compressor, compressor can normally move, continue as the user cold is provided continually, can not reach design temperature because of hot water, corresponding compressor is shut down or change low-speed running over to, and stop the cold wind supply.When the hot water temperature who detects when second temperature sensor is lower than the hot water temperature and sets value, second controller sends the peripheral passage that cooling water circulating device is cut off in instruction, and the peripheral passage of opening hot water circulating device simultaneously continues hot water is heated, until reaching design temperature, move in circles.So the present invention when heating water, can also provide stable cold for air-conditioned room, has saved resource, saved user's air-conditioning spending expense.When winter, the user did not need cold, can also remove connecting the air channel, the cold wind that unit produces is directly arranged environment space towards periphery, can improve the heat transfer intensity of refrigeration working medium and air in first heat exchanger like this, the heating capacity of raising unit.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 be embodiment illustrated in fig. 1 in the theory diagram of first controller;
Fig. 3 be embodiment illustrated in fig. 1 in the theory diagram of second controller.
The specific embodiment
Fig. 1 shows a kind of air-source heat pump hot water group, it comprises gas compression unit 1, with first heat exchanger 2 that can carry out heat exchange with outdoor air, with the blower fan 3 that can around the heat exchange surface of described first heat exchanger, produce wind field, with second heat exchanger 7 that can carry out heat exchange with user's hot water, with the hot water circulating device that is connected with described second heat exchanger 7, described gas compression unit 1, first heat exchanger 2 and second heat exchanger 7 correspondingly link together by cross valve 6, and annexation between them and known heat-pump hot-water unit are basic identical.First heat exchanger 2 is made of finned heat exchanger, and blower fan 3 is installed on the inside of described finned heat exchanger, and such structure is compactness but also heat exchange efficiency height not only.
Described air compression unit 1 comprises first compressor 11 and second compressor 12, and the air intake duct of described these compressors and blast pipe are in parallel respectively.Certainly the quantity of compressor is not limited to two, can determine according to the required maximum heating capacity of user, but should guarantee two at least.
As shown in Figure 2, this heat-pump hot-water unit also comprises first temperature sensor of detectable environment temperature and the pressure sensor and first controller of detectable compressor air suction pressure; The input of described first controller is electrically connected with first temperature sensor and pressure sensor respectively, the output of described first controller is electrically connected with blower fan 3 and compressor respectively, described first controller is provided with the temperature signal that first temperature sensor can be detected and the environment temperature setting value compares and make corresponding compressor enter the first control circuit and the pressure signal that pressure sensor can be detected of opening and pressure set points compares and according to the second control circuit of comparative result system control blower fan 3 rotating speeds according to comparative result.
When using summer, if environment temperature is higher than desired temperature, the first control circuit of first controller compares temperature signal and the environment temperature setting value that first temperature sensor detects, and make the few relatively compressor of platform number enter opening according to comparative result, thereby reduced the compressed capability of whole gas compression unit, adapted to user summer with the few demand of hot water; When using in the winter time, if environment temperature is lower than the environment temperature setting value, the first control circuit of first controller will be according to comparative result, make the many relatively compressors of platform number enter opening, thereby increased the compressed capability of whole gas compression unit, adapted to the user and used the many demands of heat winter.It does not need additionally to increase electric heating device, thermal efficiency height, and reduced user's use cost.
For the more consumption of the living electric energy of joint, one in described these compressors is frequency-changeable compressor, it can be according to what of user's needs heat, by adjusting the frequency of supply of frequency-changeable compressor, change the motor speed of described frequency-changeable compressor, thereby adjust the compressed capability of frequency-changeable compressor, the operation that makes whole unit further reduces user's use cost more economically.
When ambient temperature is too high, the evaporating temperature of heat-exchange working medium will increase, thereby make compressor air suction pressure overpressure setting value, at this moment, first heat exchanger 2 will reduce the rotating speed of blower fan 3 by second control circuit, thereby reduce the heat that refrigeration working medium absorbs from air, so the evaporating pressure when reducing refrigeration working medium and in first heat exchanger, evaporate, the normal operation of assurance compressor; When compressor air suction pressure is lower than pressure set points, first heat exchanger 2 will improve the rotating speed of blower fan 3 by second control circuit, thereby increase the heat that refrigeration working medium absorbs from air, and then the evaporating pressure when improving refrigeration working medium and in first heat exchanger, evaporating, refrigeration working medium is fully evaporated, improve the heating capacity of compressor.Therefore, no matter summer or winter, compressor can both safe and reliable operation under a metastable temperature environment.
Shown in Fig. 1 and Fig. 3 were common, in order to collect the cold wind that this heat-pump hot-water unit produces, this hot water unit also was provided with new bellows 5, and was connected air channel 4 between the air outlet of the air inlet that is removably connected to described new bellows 5 and described first heat exchanger 2; With with that be connected and the in parallel cooling water circulating device of described second heat exchanger 7 with described hot water circulating device, with second temperature sensor that can detect hot water temperature in the described hot water circulating device and the temperature signal that second temperature sensor can be detected and hot water temperature's setting value compares and select one in hot water circulating device and the cooling water circulating device to connect and second controller of another disconnection according to comparative result.
Described hot water circulating device comprises that pipeline is series at water inlet and the hot-water circulating pump between the delivery port, the automatically controlled stop valve of hot water line and the hot water storage tank 82 of described second heat exchanger 7, and the automatically controlled stop valve of described hot water line is electrically connected with described second controller.Its concrete structure is: be provided with the automatically controlled stop valve 81 of first hot water line between described cold second heat exchanger, 7 delivery ports and described hot water storage tank's 82 the water inlet, be provided with the automatically controlled stop valve 83 of second hot water line between the water inlet of described hot water storage tank's 82 delivery port and water pump 10, the delivery port of described water pump 10 is connected with the water inlet of described second heat exchanger 7.
Described cooling water circulating device comprises that pipeline is series at the water inlet of described second heat exchanger 7 and automatically controlled stop valve of cooling water cycle water pump, cooling water pipeline and water-cooling apparatus 92 between the delivery port, water-cooling apparatus 92 is made of cooling tower, and the automatically controlled stop valve of described cooling water pipeline is electrically connected with described second controller.Its concrete structure is: be provided with the automatically controlled stop valve 81 of first cooling water pipeline between the water inlet of the delivery port of described second heat exchanger 7 and described water-cooling apparatus 92, be provided with the automatically controlled stop valve 83 of second cooling water pipeline between the water inlet of the delivery port of described water-cooling apparatus 82 and described water pump 10.
By said structure as can be seen, described cooling water cycle water pump and hot-water circulating pump are made of same water pump 10.
Behind the heat exchange surface of air through first heat exchanger 2, heat is absorbed into and is cold wind, and cold wind imports new bellows 5 through connecting air channel 4, can be cooling for user's summer air-conditioning.When the hot water temperature who detects when second temperature sensor is higher than the hot water temperature and sets value, second controller sends the peripheral passage that hot water circulating device is cut off in instruction, open the peripheral passage of cooling water circulating device simultaneously, make the condensation temperature of refrigeration working medium in second heat exchanger be unlikely the condensation temperature that allows above compressor, compressor can normally move, continue as the user cold is provided continually, can not reach design temperature because of hot water, corresponding compressor is shut down or change low-speed running over to, and stop the cold wind supply.When the hot water temperature who detects when second temperature sensor is lower than the hot water temperature and sets value, second controller sends the peripheral passage that cooling water circulating device is cut off in instruction, and the peripheral passage of opening hot water circulating device simultaneously continues hot water is heated, until reaching design temperature, move in circles.So the present invention when heating water, can also provide stable cold for air-conditioned room, has saved resource, saved user's air-conditioning spending expense.When winter, the user did not need cold, can also remove connecting the air channel, the cold wind that unit produces is directly arranged environment space towards periphery, can improve the heat transfer intensity of refrigeration working medium and air in first heat exchanger like this, the heating capacity of raising unit.
In sum, the present invention has done 3 improvement on the basis of known technology: one, and with at least two Compressor parallel, and it is warm with setting by a temperature sensor outdoor temperature signal to be reached a controller The degree value compares, and determines then the unlatching quantity of compressor according to comparative result, thereby fundamentally solves Winter or summer when operation, the hot water amount that the user needs and the unmatched problem of heating capacity of unit. Its two, The pressure sensor of surveying suction pressure of compressor is set, its force value that records and setting value is compared, And determine to heighten or reduce rotation speed of fan according to comparative result, thereby reach the system of adjusting by changing air quantity The purpose of cold working medium evaporating pressure in heat exchanger has guaranteed the normal operation of compressor. Its three, by increasing Add and connect the cold that air channel and cold water EGR will discard originally and reclaimed, improved the profit of Hot water units Use rate, and reduced user's energy resource consumption.

Claims (7)

1. air-source heat pump hot water group, comprise gas compression unit (1), with first heat exchanger (2) that can carry out heat exchange with outdoor air, with the blower fan (3) that can around the heat exchange surface of described first heat exchanger, produce wind field, with second heat exchanger (7) that can carry out heat exchange with user's hot water, with the hot water circulating device that is connected with described second heat exchanger (7), described gas compression unit (1), first heat exchanger (2) and second heat exchanger (7) correspondingly link together by cross valve (6), it is characterized in that: described air compression unit (1) comprises two compressors at least, and the air intake duct of described these compressors and blast pipe are in parallel respectively; It also comprises first temperature sensor of detectable environment temperature and the pressure sensor and first controller of detectable compressor air suction pressure; The input of described first controller is electrically connected with first temperature sensor and pressure sensor respectively, the output of described first controller is electrically connected with blower fan (3) and compressor respectively, described first controller is provided with the temperature signal that first temperature sensor can be detected and the environment temperature setting value compares and make corresponding compressor enter the first control circuit and the pressure signal that pressure sensor can be detected of opening and pressure set points compares and according to the second control circuit of comparative result system control blower fan (3) rotating speed according to comparative result.
2. air-source heat pump hot water group as claimed in claim 1 is characterized in that: one in described these compressors is frequency-changeable compressor.
3. air-source heat pump hot water group as claimed in claim 2 is characterized in that: it also comprises new bellows (5), and is connected air channel (4) between the air outlet of the air inlet that is removably connected to described new bellows (5) and described first heat exchanger (2); With with described second heat exchanger (7) cooling water circulating device that be connected and in parallel with described hot water circulating device, with second temperature sensor that can detect hot water temperature in the described hot water circulating device and the temperature signal that second temperature sensor can be detected and hot water temperature's setting value compares and select one in hot water circulating device and the cooling water circulating device to connect and second controller of another disconnection according to comparative result.
4. air-source heat pump hot water group as claimed in claim 3, it is characterized in that: described hot water circulating device comprises that pipeline is series at water inlet and the hot-water circulating pump between the delivery port, the automatically controlled stop valve of hot water line and the hot water storage tank (82) of described second heat exchanger (7), and the automatically controlled stop valve of described hot water line is electrically connected with described second controller.
5. air-source heat pump hot water group as claimed in claim 4, it is characterized in that: described cooling water circulating device comprises that pipeline is series at the water inlet of described second heat exchanger (7) and automatically controlled stop valve of cooling water cycle water pump, cooling water pipeline between the delivery port and water-cooling apparatus (92), and the automatically controlled stop valve of described cooling water pipeline is electrically connected with described second controller.
6. air-source heat pump hot water group as claimed in claim 5 is characterized in that: described cooling water cycle water pump and hot-water circulating pump are made of same water pump (10).
7. air-source heat pump hot water group as claimed in claim 1 is characterized in that: described first heat exchanger (2) is made of finned heat exchanger, and described blower fan (3) is installed on the inside of described finned heat exchanger.
CN2007100132072A 2007-01-08 2007-01-08 Air source heat pump hot water units Expired - Fee Related CN101221007B (en)

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CN101221007B CN101221007B (en) 2011-01-12

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN102109261A (en) * 2009-12-25 2011-06-29 三洋电机株式会社 Refrigerating apparatus
CN102109260A (en) * 2009-12-25 2011-06-29 三洋电机株式会社 Refrigerating apparatus
CN102200786A (en) * 2010-03-25 2011-09-28 北新集团建材股份有限公司 Remote liquid level control device for light mineral wool sound-absorbing board waste systems
CN105202759A (en) * 2015-08-31 2015-12-30 黑龙江宏利天扬新能源技术开发有限公司 External heat energy converter of air source heat pump water heater
CN105935446A (en) * 2015-03-02 2016-09-14 庆东纳碧安株式会社 Method for sterilizing hot water mat
CN106705590A (en) * 2016-12-13 2017-05-24 河南佰衡节能科技股份有限公司 Heat pump type water heating drying system
CN108826745A (en) * 2018-08-01 2018-11-16 安徽欧瑞达电器科技有限公司 A kind of hairdressing place's Hot water units
CN109237792A (en) * 2018-10-24 2019-01-18 大连民族大学 A kind of heating device for low temperature hot spring bubble pond
CN110793240A (en) * 2019-10-10 2020-02-14 青岛新欧亚能源有限公司 Large-scale air source heat pump low-energy consumption operation system and control method
CN114087721A (en) * 2021-11-24 2022-02-25 美的集团武汉制冷设备有限公司 Fresh air equipment control method, device, equipment and storage medium
WO2022068307A1 (en) * 2020-12-31 2022-04-07 青岛海尔空调电子有限公司 Water-cooling heat pump unit and control method therefor

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CN2625805Y (en) * 2003-05-30 2004-07-14 薛天鹏 Wide temperate zone air source heat pump refrigerating unit
CN1804489A (en) * 2005-01-14 2006-07-19 刘永青 Air source hot pump water heater capable of changing speed and regulating pressure under multiple working conditions
CN1865815A (en) * 2006-05-16 2006-11-22 东南大学 Double-compressor hybrid-power combustion-gas thermal pump air-conditioning system
CN201003885Y (en) * 2007-01-08 2008-01-09 葛建民 Air source thermal pump water heater unit

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102109261A (en) * 2009-12-25 2011-06-29 三洋电机株式会社 Refrigerating apparatus
CN102109260A (en) * 2009-12-25 2011-06-29 三洋电机株式会社 Refrigerating apparatus
CN102200786A (en) * 2010-03-25 2011-09-28 北新集团建材股份有限公司 Remote liquid level control device for light mineral wool sound-absorbing board waste systems
CN105935446A (en) * 2015-03-02 2016-09-14 庆东纳碧安株式会社 Method for sterilizing hot water mat
CN105202759A (en) * 2015-08-31 2015-12-30 黑龙江宏利天扬新能源技术开发有限公司 External heat energy converter of air source heat pump water heater
CN106705590A (en) * 2016-12-13 2017-05-24 河南佰衡节能科技股份有限公司 Heat pump type water heating drying system
CN108826745A (en) * 2018-08-01 2018-11-16 安徽欧瑞达电器科技有限公司 A kind of hairdressing place's Hot water units
CN109237792A (en) * 2018-10-24 2019-01-18 大连民族大学 A kind of heating device for low temperature hot spring bubble pond
CN110793240A (en) * 2019-10-10 2020-02-14 青岛新欧亚能源有限公司 Large-scale air source heat pump low-energy consumption operation system and control method
WO2022068307A1 (en) * 2020-12-31 2022-04-07 青岛海尔空调电子有限公司 Water-cooling heat pump unit and control method therefor
CN114087721A (en) * 2021-11-24 2022-02-25 美的集团武汉制冷设备有限公司 Fresh air equipment control method, device, equipment and storage medium

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