CN103900300B - Air-conditioner and control method thereof - Google Patents
Air-conditioner and control method thereof Download PDFInfo
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- CN103900300B CN103900300B CN201210570242.5A CN201210570242A CN103900300B CN 103900300 B CN103900300 B CN 103900300B CN 201210570242 A CN201210570242 A CN 201210570242A CN 103900300 B CN103900300 B CN 103900300B
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Abstract
The invention discloses a kind of air-conditioner and control method thereof, this air-conditioner comprises the automatic adjusting part of compressor, condenser, throttle part, evaporimeter and coolant quantity, and the automatic adjusting part of described coolant quantity comprises: fluid reservoir, the first to the 3rd valve and controller.Specifically, described 3rd valve is connected between the entrance of described compressor and the outlet of described evaporimeter, the first end of described first valve is connected between the outlet of described evaporimeter and described 3rd valve, second end of described first valve is connected with the inlet of described fluid reservoir, and the first end of described second valve is connected between described 3rd valve and the entrance of described compressor and the second end of described second valve is connected with the liquid outlet of described fluid reservoir; Described controller is connected with the described first to the 3rd valve respectively, for controlling the operation of the described first to the 3rd valve.According to the air-conditioner of the embodiment of the present invention, automatically can regulate the coolant quantity of air-conditioner internal circulation heat-exchanging, improve stability and the reliability of air-conditioner.
Description
Technical field
The present invention relates to field of domestic appliances manufacture technology, particularly a kind of air-conditioner and the control method for this air-conditioner.
Background technology
At present, because air-conditioner has good heat exchange property, be widely applied, for people provide comfortable work and living environment.Air-conditioner carries out exchange heat by refrigerant, and when coolant quantity normally meets design flow, serviceability and reliability all meet the demands.But when coolant quantity is on the high side or on the low side, causes refrigeration or heating capacity deficiency, the reliability of air-conditioner is reduced.The air-conditioner of conventional art is when producing or install, and because the production technology, operation etc. of each air-conditioner there are differences, portioned product can exist refrigerant situation on the high side or on the low side, so just have impact on the result of use of product.Although some product when mounted or the later stage can coolant adding, can there is difference in performance in the refrigerant of different batches, properties of product also can be caused undesirable.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, one object of the present invention is to propose a kind of air-conditioner that automatically can regulate coolant quantity.
Another object of the present invention is to propose a kind of control method for this air-conditioner.
According to the air-conditioner of the embodiment of the present invention, comprise the automatic adjusting part of compressor, condenser, throttle part, evaporimeter and coolant quantity, the automatic adjusting part of described coolant quantity comprises: fluid reservoir, the first to the 3rd valve and controller.Specifically, described 3rd valve is connected between the entrance of described compressor and the outlet of described evaporimeter, the first end of described first valve is connected between the outlet of described evaporimeter and described 3rd valve, second end of described first valve is connected with the inlet of described fluid reservoir, and the first end of described second valve is connected between described 3rd valve and the entrance of described compressor and the second end of described second valve is connected with the liquid outlet of described fluid reservoir; Described controller is connected with the described first to the 3rd valve respectively, for controlling the operation of the described first to the 3rd valve.
According to the air-conditioner of the embodiment of the present invention, be provided with the automatic adjusting part of coolant quantity.Thus, the automatic adjusting part of coolant quantity can regulate the coolant quantity carrying out cycle heat exchange in air-conditioner automatically, the refrigerant carrying out recuperated cycle in air-conditioner is made to maintain predetermined coolant quantity, the heat exchange property of the air-conditioner avoiding the coolant quantity difference because injecting in advance during assembling to cause is unstable, improves stability and the reliability of air-conditioner.Structure is simple, and refrigerant regulating effect is good, improves the performance of air-conditioner.
In addition, air-conditioner according to the above embodiment of the present invention, can also have following additional technical characteristic:
In addition, in some embodiments of the invention, the described first to the 3rd valve is respectively magnetic valve.Thus, facilitate control first to the 3rd valve, make the adjustment fast and stable of the refrigerant of air-conditioner.
In the air-conditioner of one embodiment of the present of invention, also comprise cross valve, described cross valve has first to fourth valve port, described first valve port is connected with the outlet of described compressor, described second valve port is connected with the entrance of described condenser, described 3rd valve port is connected with the entrance of described compressor, described 4th valve port is connected with the outlet of described evaporimeter, described 3rd valve is connected between described 3rd valve port and the entrance of described compressor, and the first end of described first valve is connected between described 3rd valve port and described 3rd valve.Thus, the function that air-conditioner has refrigeration and heats is made, the serviceability of the air-conditioner of raising.
In addition, according to some embodiments of the present invention, described cross valve is magnetic valve.Thus, cross valve is easily controlled, quick adjustment air-conditioner freezes or heats.
In addition, according to an example of the present invention, also comprise the sensor for the pressure at expulsion or delivery temperature detecting described compressor, described controller is connected to control the described first to the 3rd valve according to the detection signal of described sensor with described sensor.Thus, simplify the testing process of coolant quantity, make air conditioner structure simple, convenient detection and adjustment.
In addition, according to a concrete example of the present invention, described sensor is located at the exit of described compressor.
According to the control method of the air-conditioner of previous embodiment of the present invention, comprising: detect the coolant quantity of described air-conditioner Inner eycle whether within the scope of predetermined coolant quantity; If described coolant quantity is greater than the maximum of described predetermined coolant quantity scope, closes the 3rd valve, open the first and second valves; If described coolant quantity is less than the minimum of a value of predetermined coolant quantity scope, close the first valve, open second and the 3rd valve; If described coolant quantity, within the scope of described predetermined coolant quantity, closes the first and second valves, open the 3rd valve.
According to the control method of the air-conditioner of previous embodiment of the present invention, automatically can regulate the coolant quantity at air-conditioner Inner eycle, make air-conditioner have good heat exchange property.Thus, the automatic adjusting part of coolant quantity can regulate the coolant quantity carrying out cycle heat exchange in air-conditioner automatically, the refrigerant carrying out recuperated cycle in air-conditioner is made to maintain predetermined coolant quantity, the difference of the heat exchange property avoiding the difference of the coolant quantity because injecting in advance to cause, improves stability and the reliability of air-conditioner.Structure is simple, and refrigerant regulating effect is good, improves the performance of air-conditioner.
In addition, according to the control method of the air-conditioner of the embodiment of the present invention, detect the pressure at expulsion of described compressor, judge the pressure at expulsion that detects whether in preset range, if described pressure at expulsion is greater than the maximum of described preset range, then described coolant quantity is greater than the maximum of described predetermined coolant quantity scope, if described pressure at expulsion is less than the minimum of a value of described preset range, then described coolant quantity is less than the minimum of a value of described predetermined coolant quantity scope, if described pressure at expulsion is in described preset range, then described coolant quantity is within the scope of described predetermined coolant quantity.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic diagram of the air-conditioner of one embodiment of the present of invention;
Fig. 2 is the schematic flow sheet of the control method of the air-conditioner of one embodiment of the present of invention.
Wherein, compressor 10, condenser 20, evaporimeter 30, first valve 41, second valve 42, the 3rd valve 43, fluid reservoir 44, controller 45, cross valve 50, first valve port d, the second valve port c, the 3rd valve port s, the 4th valve port e.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
At present, because air-conditioner has good heat exchange property, be widely applied, for people provide comfortable work and living environment.Air device carries out exchange heat by refrigerant, and when coolant quantity normally meets design flow, serviceability and reliability all meet the demands.But when coolant quantity is on the high side or on the low side, causes refrigeration or heating capacity deficiency, the reliability of air-conditioner is reduced.The air-conditioner of conventional art is when producing or install, and because the production technology, operation etc. of each air-conditioner there are differences, portioned product can exist refrigerant situation on the high side or on the low side, so just have impact on the result of use of product.Although some product when mounted or the later stage can coolant adding, can there is difference in performance in the refrigerant of different batches, properties of product also can be caused undesirable.The object of the invention is to propose a kind of air-conditioner with the automatic adjusting part of coolant quantity, for improving the stability of air-conditioner work.
Describe air-conditioner of the present invention with reference to the accompanying drawings in detail.
Fig. 1 is the schematic diagram of the air-conditioner of the embodiment of the present invention, and with reference to Fig. 1, this air-conditioner comprises compressor 10, condenser 20, throttle part (not shown), evaporimeter 30 and the automatic adjusting part of coolant quantity.The automatic adjusting part of this coolant quantity comprises: the first valve 41, second valve 42, the 3rd valve 43, fluid reservoir 44 and controller 45.
Specifically, 3rd valve 43 is connected between the outlet (i.e. the connector of evaporimeter 30 left end as shown in Figure 1) of the entrance (i.e. the connector of compressor 10 right-hand member as shown in Figure 1) of compressor 10 and evaporimeter 30, and the entrance of this compressor 10 is the gas returning port of compressor.The first end of the first valve 41 (i.e. the left end of the first valve 41 as shown in Figure 1) is connected between the outlet of evaporimeter 30 and the 3rd valve 43.Second end of the first valve 41 (i.e. the right-hand member of the first valve 41 as shown in Figure 1) is connected with the inlet of fluid reservoir 44.The first end of the second valve 42 (i.e. the lower end of the second valve 42 as shown in Figure 1) is connected between the 3rd valve 43 and the entrance of compressor 10, and the second end of the second valve 42 (i.e. the upper end of the second valve 42 as shown in Figure 1) is connected with the liquid outlet of fluid reservoir 44.Wherein, the refrigerant in air-conditioner gets back to the entrance of compressor 10 through the 3rd valve 43, or gets back to the entrance of compressor 10 through the first valve 41, fluid reservoir 44 and the 3rd valve 43.
First valve 41, second valve 42 and opening or closing of the 3rd valve 43 are controlled by controller 45.Particularly, the operation that controller 45 is connected for controlling the first valve 41 with the first valve 41, the operation that controller 45 is connected for controlling the second valve 42 with the second valve 42, the operation that controller 45 is connected for controlling the 3rd valve 43 with the 3rd valve 43.
According to the air-conditioner of the embodiment of the present invention, be provided with the automatic adjusting part of coolant quantity.Thus, the automatic adjusting part of coolant quantity can regulate the coolant quantity participating in recuperated cycle in air-conditioner automatically, the refrigerant carrying out recuperated cycle in air-conditioner is made to maintain predetermined coolant quantity, the difference of the heat exchange property avoiding the coolant quantity difference because injecting in advance during assembling to cause, improves stability and the reliability of air-conditioner.Structure is simple, and refrigerant regulating effect is good, improves the performance of air-conditioner.
In addition, at the coolant quantity of air-conditioner Inner eycle when coolant quantity in air-conditioner of the present invention normally runs higher than air-conditioning, thus, when occurring that error causes coolant quantity lower than predetermined coolant quantity when assembling, air-conditioner still can normally work, and unnecessary refrigerant can be stored in fluid reservoir, to regulate the refrigerant participating in cycle heat exchange in air-conditioner.
The automatic adjusting part of refrigerant regulates the detailed process of the coolant quantity of air-conditioner internal circulation heat-exchanging as follows: if the coolant quantity carrying out heat exchange in air-conditioner is higher than predetermined coolant quantity, then close the 3rd valve 43 and open the first valve 41 and the second valve 42, make air-conditioner internal circulation heat-exchanging refrigerant under pressure, be deposited in fluid reservoir 44; If carry out the coolant quantity of cycle heat exchange in air-conditioner lower than predetermined coolant quantity, close the first valve 41 and open the second valve 42 and the 3rd valve 43, refrigerant is made to have the 3rd valve 43 to enter compressor 10 entrance, too low its pressure that makes of coolant quantity is less, the refrigerant in fluid reservoir 44 is entered in air-conditioner and circulates; If the coolant quantity of air-conditioner internal circulation heat-exchanging equals predetermined coolant quantity, then open the 3rd valve 43 and close the first valve 41 and the second valve 42, making fluid reservoir 44 not participate in coolant quantity and regulate.
In addition, the first valve 41, second valve 42 and the 3rd valve 43 are respectively magnetic valve.Each in first valve 41, second valve 42 and the 3rd valve 43 all has control end, and control end to be communicated with the second end for controlling corresponding first end or to disconnect, and controller 45 is connected with the control end of magnetic valve.Thus, conveniently each valve is controlled.Refrigerant in air-conditioner is regulated more intelligent, and make the first valve 41, second valve 42 and stable the opening and turning off of the 3rd valve 43, improve the stability that air-conditioner runs.
Certainly, the first valve 41, second valve 42 and the 3rd valve 43 can also be the valves such as hydraulic valve or air pressure valve.
In addition, for ease of the quick adjustment of the automatic adjusting part of refrigerant, make the adjustment of refrigerant more can only with easy adjustment, need real-time detection at the coolant quantity of air-conditioner Inner eycle, and compare with predetermined coolant quantity, so that regulate the coolant quantity at air-conditioner Inner eycle according to comparative result.In the embodiment of the present invention illustrated in fig. 1, sensor 46 is set at outlet (i.e. the connector of the upper end of the compressor 10 as shown in Figure 1) place of compressor 10.To detect the coolant quantity of being discharged by compressor 10 in time, in time the refrigerant at air-conditioner Inner eycle is regulated.Particularly, this sensor 46, for detecting pressure at expulsion or the delivery temperature of compressor 10, detects the coolant quantity at air-conditioner cycle heat exchange by the pressure at expulsion or delivery temperature measuring compressor 10.Controller 45 is connected with sensor 46, and controller 45 controls the first valve 41, second valve 42 and the 3rd valve 43 according to the detection signal of sensor 46.Thus, according to pressure at expulsion and the delivery temperature adjustment coolant quantity of compressor 10, make the coolant quantity of air-conditioning easy to detect, be convenient to the operation of the automatic adjusting part of coolant quantity, the situation of coolant quantity in air-conditioner can be understood fast, and carry out quick adjustment according to feedback information.
In addition, as shown in Figure 1, this air-conditioner also comprises cross valve 50, and cross valve 50 has the first valve port d, the second valve port c, the 3rd valve port s and the 4th valve port e.Wherein, this cross valve 50 has two kinds of mode of operations, freezes for regulating air-conditioner or heats.Particularly, in the first operational mode, the first valve port d is communicated with the second valve port c and the 3rd valve port s is communicated with the 4th valve port e; In a second mode of operation, the first valve port d is communicated with the 4th valve port e and the second valve port c is communicated with the 3rd valve port s.Thus, improve the function of air-conditioner, meet user different demands, improve the serviceability of air-conditioner.
Particularly, as shown in Figure 1, the first valve port d is connected with the outlet of compressor 10, and the second valve port c is connected with the entrance (namely as the connector on condenser in Fig. 1 20 left side) of condenser 20,3rd valve port s is connected with the entrance of compressor 10, and the 4th valve port e is connected with the outlet of evaporimeter 30.3rd valve 43 is connected between the 3rd valve port s and the entrance of compressor 10, and the first end of the first valve 41 is connected between the 3rd valve port s and the 3rd valve 43.Under the first mode of operation of cross valve 50, the refrigerant that the outlet of compressor 10 exports gets back to the entrance of compressor through condenser 20, evaporimeter 30; Under the second mode of operation of cross valve 50, the refrigerant that the outlet of compressor 10 exports gets back to compressor through evaporator 30, condenser 20.
Thus, make air-conditioner under the mode of operation of freezing or heat, all can automatically adjust to coolant quantity, improve practicality and the scope of application of the air-conditioner of invention.
Certainly, air-conditioner of the present invention also can only for refrigeration, and this is understandable for those of ordinary skill in the art.
In addition, cross valve 50 is magnetic valve.Cross valve 50 is switched fast between the first mode of operation and the second mode of operation, improves the operating efficiency of air-conditioner, easy to use.
Describe the control method of the air-conditioner of the embodiment of the present invention with reference to the accompanying drawings in detail.
Fig. 2 shows the control method of air-conditioner of the present invention, and this air-conditioner is the air-conditioner according to previous embodiment of the present invention.Described control method comprises:
Detect the coolant quantity of air-conditioner Inner eycle, and compare with predetermined coolant quantity scope, judge coolant quantity whether within the scope of predetermined coolant quantity.
If the coolant quantity detected is greater than the maximum of predetermined coolant quantity scope, closes the 3rd valve 43, open the first valve 41 and the second valve 42.Make refrigerant through fluid reservoir 44, and refrigerant is deposited under pressure in fluid reservoir 44.
If the coolant quantity detected is less than the minimum of a value of predetermined coolant quantity scope, closes the first valve 41, open the second valve 42 and the 3rd valve 43.Make refrigerant be back to compressor 10 through the 3rd valve 43, in addition, the pressure through the refrigerant of the 3rd valve 43 is less, and the refrigerant in fluid reservoir 44 supplements the refrigerant being back to compressor through the second valve 42.
If the coolant quantity detected within the scope of predetermined coolant quantity, is then closed the first valve 41 and the second valve 42, is opened the 3rd valve 43.Make the refrigerant of circulation without fluid reservoir 44, avoid fluid reservoir 44 to participate in the circulation of refrigerant in air-conditioner and the coolant quantity changed at air-conditioner Inner eycle.
According to the control method of the air-conditioner of previous embodiment of the present invention, automatically can regulate the coolant quantity at air-conditioner Inner eycle, make air-conditioner have good heat exchange property.Thus, the automatic adjusting part of coolant quantity can regulate the coolant quantity carrying out cycle heat exchange in air-conditioner automatically, the refrigerant carrying out recuperated cycle in air-conditioner is made to maintain predetermined coolant quantity, the difference of the heat exchange property avoiding the difference of the coolant quantity because injecting in advance to cause, improves stability and the reliability of air-conditioner.Structure is simple, and refrigerant regulating effect is good, improves the performance of air-conditioner.
In addition, according to the control method of the air-conditioner of the embodiment of the present invention, the pressure at expulsion of compressor 10 is detected.And judge that coolant quantity at air-conditioner Inner eycle is the need of adjustment by detection architecture.Specific as follows: judge the pressure at expulsion that detects whether in preset range, if the pressure at expulsion detected is greater than the maximum of the preset range of detection, then the coolant quantity detected is greater than the maximum of the predetermined coolant quantity scope of detection; If the pressure at expulsion detected is less than the minimum of a value of the preset range of detection, then the coolant quantity detected is less than the minimum of a value of the predetermined coolant quantity scope of detection; If the pressure at expulsion detected is in the preset range of detection, then the coolant quantity detected is within the scope of the predetermined coolant quantity of detection.Thus, simplify detection and the judgement of coolant quantity, make the detection architecture of the coolant quantity of air-conditioner accurately and convenient adjustment, improve the practicality of air-conditioner.
Certainly, air-conditioner of the present invention can also judge the coolant quantity participating in circulating in air-conditioner by the delivery temperature detecting compressor 10, this is understandable for those of ordinary skill in the art.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (8)
1. an air-conditioner, comprises the automatic adjusting part of compressor, condenser, throttle part, evaporimeter and coolant quantity, it is characterized in that, the automatic adjusting part of described coolant quantity comprises:
Fluid reservoir;
First to the 3rd valve, described 3rd valve is connected between the entrance of described compressor and the outlet of described evaporimeter, the first end of described first valve is connected between the outlet of described evaporimeter and described 3rd valve, second end of described first valve is connected with the inlet of described fluid reservoir, and the first end of described second valve is connected between described 3rd valve and the entrance of described compressor and the second end of described second valve is connected with the liquid outlet of described fluid reservoir; With
Controller, described controller is connected with the described first to the 3rd valve respectively, for controlling the operation of the described first to the 3rd valve.
2. air-conditioner according to claim 1, is characterized in that, the described first to the 3rd valve is respectively magnetic valve.
3. air-conditioner according to claim 1, it is characterized in that, also comprise cross valve, described cross valve has first to fourth valve port, described first valve port is connected with the outlet of described compressor, described second valve port is connected with the entrance of described condenser, described 3rd valve port is connected with the entrance of described compressor, described 4th valve port is connected with the outlet of described evaporimeter, described 3rd valve is connected between described 3rd valve port and the entrance of described compressor, and the first end of described first valve is connected between described 3rd valve port and described 3rd valve.
4. air-conditioner according to claim 3, is characterized in that, described cross valve is magnetic valve.
5. the air-conditioner according to any one of claim 1-4, it is characterized in that, also comprise the sensor for the pressure at expulsion or delivery temperature detecting described compressor, described controller is connected to control the described first to the 3rd valve according to the detection signal of described sensor with described sensor.
6. air-conditioner according to claim 5, is characterized in that, described sensor is located at the exit of described compressor.
7. a control method for the air-conditioner according to any one of claim 1-6, comprising:
Detect the coolant quantity of described air-conditioner Inner eycle whether within the scope of predetermined coolant quantity;
If described coolant quantity is greater than the maximum of described predetermined coolant quantity scope, closes the 3rd valve, open the first and second valves; If described coolant quantity is less than the minimum of a value of predetermined coolant quantity scope, close the first valve, open second and the 3rd valve; If described coolant quantity, within the scope of described predetermined coolant quantity, closes the first and second valves, open the 3rd valve.
8. the control method of air-conditioner according to claim 7, is characterized in that, detects the pressure at expulsion of described compressor,
Judge the pressure at expulsion that detects whether in preset range, if described pressure at expulsion is greater than the maximum of described preset range, then described coolant quantity is greater than the maximum of described predetermined coolant quantity scope, if described pressure at expulsion is less than the minimum of a value of described preset range, then described coolant quantity is less than the minimum of a value of described predetermined coolant quantity scope, if described pressure at expulsion is in described preset range, then described coolant quantity is within the scope of described predetermined coolant quantity.
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| CN104121725B (en) * | 2014-07-09 | 2016-07-06 | 广东美的暖通设备有限公司 | Heat pump and control method thereof |
| CN105972822B (en) * | 2016-06-14 | 2019-04-02 | 珠海格力电器股份有限公司 | Heat pump water heater and adjusting method thereof |
| CN109708376B (en) * | 2018-07-13 | 2020-06-23 | 青岛海尔股份有限公司 | Refrigerator refrigerating system |
| CN109737631A (en) * | 2018-08-28 | 2019-05-10 | 广东志高暖通设备股份有限公司 | Defrost air-conditioning system is not shut down |
| CN109737630A (en) * | 2018-08-28 | 2019-05-10 | 广东志高暖通设备股份有限公司 | Defrost air-conditioning system is not shut down |
| CN110529966A (en) * | 2019-09-09 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of change coolant quantity air-conditioning system and its control method |
| CN111174368B (en) * | 2020-01-07 | 2021-10-15 | 宁波奥克斯电气股份有限公司 | Method for automatically adjusting refrigerant quantity of air conditioner and air conditioning system |
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| CN103900300A (en) | 2014-07-02 |
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