CN115183402A - Control method and control device for defrosting of air conditioner and air conditioner - Google Patents
Control method and control device for defrosting of air conditioner and air conditioner Download PDFInfo
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- CN115183402A CN115183402A CN202210776936.8A CN202210776936A CN115183402A CN 115183402 A CN115183402 A CN 115183402A CN 202210776936 A CN202210776936 A CN 202210776936A CN 115183402 A CN115183402 A CN 115183402A
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- temperature
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- heat exchange
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/62—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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The application relates to the technical field of air conditioner defrosting, and discloses a control method for air conditioner defrosting, which comprises the following steps: under the condition that the air conditioner needs defrosting, the temperature of heat exchange fluid in the solar water heater and the temperature of refrigerant liquid inlet of the fluorine-water heat exchanger are obtained; and controlling the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant inlet liquid of the fluorine-water heat exchanger. The on-off state of the water pump is controlled according to the temperature of the heat exchange fluid in the solar water heater and the liquid inlet temperature of the refrigerant of the fluorine water heat exchanger, so that whether the heat of the heat exchange fluid is transferred to the refrigerant of the air conditioner or not can be controlled, and the frosting on the outdoor heat exchanger is prevented under the condition that the performance of the air conditioner is not influenced. The application also discloses a controlling means and air conditioner for air conditioner defrosting.
Description
Technical Field
The present application relates to the field of air conditioner defrosting technologies, and for example, to a control method and a control device for air conditioner defrosting, and an air conditioner.
Background
At present, most of the mainstream models of air conditioners have a heat exchange function with a cooling and heating dual mode. However, in the air conditioner under the climate conditions of low temperature, high humidity or high wind and snow, the outdoor heat exchanger of the outdoor unit functions as an evaporator for absorbing heat from the outdoor environment during the operation and heating of the indoor unit of the air conditioner. The outdoor heat exchanger is easily condensed with more frost under the influence of the temperature and the humidity of the outdoor environment, and after the frost is formed to a certain thickness, the heating capacity of the indoor unit is lower and lower, so that the user experience is influenced; therefore, in order to ensure the heating effect and avoid excessive frost condensation, the outdoor heat exchanger needs to be defrosted.
In the related art, there are various defrosting modes for the outdoor heat exchanger, such as defrosting by using an electric heating device, defrosting by using a heat storage device, or defrosting by adjusting operation parameters of air conditioning components such as a compressor and an electronic expansion valve; however, in order to improve the energy efficiency of the system, solar energy is also used for defrosting in the related art, such as a defrosting assembly. The defrosting assembly comprises an outdoor heat exchanger, a defrosting unit and a defrosting unit, wherein the outdoor heat exchanger comprises a refrigerant pipeline and a secondary refrigerant pipeline; the solar heat collector is communicated with the secondary refrigerant pipeline; when the refrigerant in the refrigerant pipeline absorbs heat to the outdoor heat exchanger, the fluid in the secondary refrigerant pipeline can provide heat for the outdoor heat exchanger. The heat collected by the solar heat collector is utilized to circularly exchange heat for the outdoor heat exchanger through the secondary refrigerant pipeline under the condition of low environmental temperature, so that the surface temperature of the outdoor heat exchanger is improved while heat is provided for the outdoor heat exchanger, and the surface of the heat exchanger is frostless or the frosting time is delayed.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
when the air conditioning unit is used for normal refrigeration or normal heating, the secondary refrigerant pipeline for assisting defrosting cannot play a role, the heat exchange area of the outdoor heat exchanger is also influenced, and the energy efficiency of the system is further reduced.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device for defrosting of an air conditioner and the air conditioner, which can effectively utilize solar energy to defrost and simultaneously do not influence the heat exchange area of an outdoor heat exchanger, thereby improving the energy efficiency of the system.
In some embodiments, the control method for defrosting the air conditioner includes that the air conditioner includes an outdoor heat exchanger, a first refrigerant pipeline and an indoor heat exchanger which are connected in sequence; the system also comprises a fluorine water heat exchanger and a solar water heater, wherein the fluorine water heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline which can exchange heat with each other, and the first heat exchange pipeline is connected in series with the first refrigerant pipeline; the solar water heater comprises a heat exchange fluid pipeline communicated with the second heat exchange pipeline; a water pump for limiting the heat exchange fluid to flow from the solar water heater to the fluorine water heat exchanger is arranged on the heat exchange fluid pipeline;
the control method comprises the following steps: under the condition that the air conditioner needs defrosting, the temperature of heat exchange fluid in the solar water heater and the temperature of refrigerant liquid inlet of the fluorine-water heat exchanger are obtained; and controlling the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant inlet liquid of the fluorine-water heat exchanger.
In some embodiments, the control device for defrosting of the air conditioner comprises an outdoor heat exchanger, a first refrigerant pipeline and an indoor heat exchanger which are connected in sequence; the system also comprises a fluorine water heat exchanger and a solar water heater, wherein the fluorine water heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline which can exchange heat with each other, and the first heat exchange pipeline is connected in series with the first refrigerant pipeline; the solar water heater comprises a heat exchange fluid pipeline communicated with the second heat exchange pipeline; a water pump for limiting the heat exchange fluid to flow from the solar water heater to the fluorine water heat exchanger is arranged on the heat exchange fluid pipeline;
the control device includes: the temperature acquisition module is configured to acquire the temperature of heat exchange fluid in the solar water heater and the liquid inlet temperature of a refrigerant of the fluorine-water heat exchanger under the condition that the air conditioner needs to be defrosted; the first state adjusting module is configured to control the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant liquid inlet of the fluorine-water heat exchanger.
In some embodiments, a control device for defrosting an air conditioner includes a processor and a memory storing program instructions, and the processor is configured to execute the control method for defrosting an air conditioner as in the foregoing embodiments when executing the program instructions.
In some embodiments, the air conditioner comprises the control device for defrosting the air conditioner in the previous embodiments.
The control method and device for defrosting of the air conditioner and the air conditioner provided by the embodiment of the disclosure can achieve the following technical effects:
the air conditioner provided by the embodiment of the disclosure is additionally provided with the fluorine water heat exchanger and the solar water heater, wherein a first heat exchange pipeline of the fluorine water heat exchanger is connected to a first refrigerant pipeline, and a second heat exchange pipeline of the fluorine water heat exchanger is connected with the solar water heater; therefore, through the first heat exchange pipeline and the second heat exchange pipeline which can exchange heat with each other, heat exchange fluid and a refrigerant which are manufactured by the solar water heater can be used for exchanging heat, the heat exchange area of the outdoor heat exchanger is not influenced, and solar energy can be effectively used for defrosting.
The control method for defrosting the air conditioner, provided by the embodiment of the disclosure, is used for acquiring the temperature of heat exchange fluid in a solar water heater and the temperature of refrigerant liquid inlet of a fluorine-water heat exchanger under the condition that the air conditioner needs to be defrosted; the on-off state of the water pump is controlled according to the temperature of the heat exchange fluid in the solar water heater and the liquid inlet temperature of the refrigerant of the fluorine water heat exchanger, so that whether the heat of the heat exchange fluid is transferred to the refrigerant of the air conditioner or not can be controlled, and the frosting on the outdoor heat exchanger is prevented under the condition that the performance of the air conditioner is not influenced.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a first overall schematic diagram of an air conditioner provided by an embodiment of the present disclosure;
fig. 2 is a second overall schematic diagram of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a third schematic overall view of an air conditioner provided in the embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a control method for defrosting an air conditioner according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another control method for defrosting an air conditioner according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another control method for defrosting an air conditioner according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a control device for defrosting an air conditioner according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of another control device for defrosting an air conditioner according to an embodiment of the present disclosure.
Reference numerals:
10: a compressor; 20: a four-way valve; 30: an outdoor heat exchanger; 40: a fluorine-water heat exchanger; 41: a first heat exchange line; 42: a second heat exchange line; 50: an indoor heat exchanger; 60: a solar water heater; 61: a third temperature sensor; 62: a heat exchange fluid line; 63: a water pump; 64: a heat exchange fluid circuit; 70: a first refrigerant pipeline; 71: a first refrigerant pipe section; 72: a first temperature sensor; 73: a second coolant pipe section; 74: a second temperature sensor; 75: a first throttling element; 80: a second refrigerant pipeline; 81: a second throttling element; 90: a third refrigerant pipeline; 91: a third throttling element;
401: a temperature acquisition module; 402: a first state adjustment module; 403: a second state adjustment module; 500: a processor; 501: a memory; 502: a communication interface; 503: a bus.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
A refrigerant circulation system of an air conditioner generally includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling element (an electronic expansion valve or a one-way valve), a four-way valve and a gas-liquid separator, wherein the four-way valve is used for changing the flow direction of a refrigerant in the refrigerant circulation system, and the gas-liquid separator is used for separating a gas-liquid two-phase refrigerant from the heat exchanger. When the air conditioner operates in a refrigeration mode, a refrigerant discharged by the compressor passes through the outdoor heat exchanger, the throttling element, the indoor heat exchanger and the gas-liquid separator in sequence through the four-way valve, and finally returns to the compressor to be compressed again. When the air conditioner runs in a heating mode, the refrigerant discharged by the compressor passes through the indoor heat exchanger, the throttling element, the outdoor heat exchanger and the gas-liquid separator in sequence through the four-way valve, and finally returns to the compressor for recompression.
Referring to fig. 1, an embodiment of the present disclosure provides an air conditioner in which refrigerant flow paths of an outdoor heat exchanger and an indoor heat exchanger are changed according to an operation mode of the air conditioner.
As shown in fig. 1 and 2, the air conditioner includes an outdoor heat exchanger 30, a first refrigerant pipeline 70, and an indoor heat exchanger 50, which are connected in sequence; the system also comprises a fluorine water heat exchanger 40 and a solar water heater 60, wherein the fluorine water heat exchanger 40 comprises a first heat exchange pipeline 41 and a second heat exchange pipeline 42 which can exchange heat with each other, and the first heat exchange pipeline 41 is connected in series on a first refrigerant pipeline 70; the solar water heater 60 comprises a heat exchange fluid pipeline 62 communicated with the second heat exchange pipeline 42; and a water pump 63 for restricting the flow of the heat exchange fluid from the solar water heater 50 to the fluorine water heat exchanger 40 is provided on the heat exchange fluid line 62.
The air conditioner provided by the embodiment of the disclosure is additionally provided with the fluorine water heat exchanger 40 and the solar water heater 60, wherein the first heat exchange pipeline 41 of the fluorine water heat exchanger 40 is connected to the first refrigerant pipeline 70, and the second heat exchange pipeline 42 of the fluorine water heat exchanger 40 is connected with the solar water heater 60; in this way, the first heat exchange pipeline 41 and the second heat exchange pipeline 42 capable of exchanging heat with each other can exchange heat between the heat exchange fluid produced by the solar water heater 60 and the refrigerant, and thus, the defrosting can be performed by effectively using solar energy without affecting the heat exchange area of the outdoor heat exchanger 30.
In some embodiments, the air conditioner further includes a second refrigerant pipeline 80 and a third refrigerant pipeline 90, one end of the second refrigerant pipeline 80 is connected to the indoor heat exchanger 50, the other end of the second refrigerant pipeline 80 is connected to the outdoor heat exchanger 30, and a second throttling element 81 is disposed on the second refrigerant pipeline 80; one end of the third refrigerant pipeline 90 is connected to the first refrigerant pipe section 73 between the indoor heat exchanger 30 and the fluorine water heat exchanger 40, the other end of the third refrigerant pipeline 90 is connected to the refrigerant pipe section between the second throttling element 81 and the outdoor heat exchanger 30, and the third throttling element 91 is arranged on the third refrigerant pipeline 90. Here, the second refrigerant pipeline 80 and the third refrigerant pipeline 90 are arranged in parallel, and when the second throttling element 81 is opened and the third throttling element 91 is closed, the refrigerant flows back to the compressor 10 after heat exchange is completed by the indoor heat exchanger 50; when the second throttling element 81 is closed and the third throttling element 91 is opened, the refrigerant flows back to the compressor 10 without passing through the indoor heat exchanger 50.
In the embodiment of the present disclosure, the refrigerant in the air conditioner may sequentially pass through the compressor 40, the four-way valve 20, the outdoor heat exchanger 30, the first refrigerant pipeline 70, the fluorine water heat exchanger 40, and the indoor heat exchanger 50, and finally flow back to the compressor through the second refrigerant pipeline 80 and/or the third refrigerant pipeline 90. Wherein a solar water heater 60 is connected to the fluorine water heat exchanger 40.
In the embodiment of the present disclosure, the first refrigerant pipeline 70 includes a first refrigerant pipe section 71 and a second refrigerant pipe section 73, the fluorine water heat exchanger 40 includes a first heat exchange pipeline 41 and a second heat exchange pipeline that can exchange heat with each other, and the solar water heater 60 includes a heat exchange fluid pipeline 62 and a heat exchange fluid loop 64.
One end of the first refrigerant pipe section 71 is connected with the outdoor heat exchanger 30, the other end of the first refrigerant pipe section 71 is connected with the first end of the first heat exchange pipeline 41, and a first throttling element 75 is arranged on the first refrigerant pipe section 71; one end of the second refrigerant pipe section 73 is connected to the second end of the first heat exchange pipe 41, and the other end of the second refrigerant pipe section 73 is connected to the indoor heat exchanger 50, so that the refrigerant can exchange heat with the second heat exchange pipe 42 through the first heat exchange pipe 41.
One end of the heat exchange fluid pipeline 62 is connected with the water outlet of the solar water heater 60, and the other end of the heat exchange fluid pipeline 62 is connected with the first end of the second heat exchange pipeline 42; one end of the heat exchange fluid loop 64 is connected to the second end of the second heat exchange pipe 42, and the other end of the heat exchange fluid loop 64 is connected to the water inlet of the solar water heater 60, so that the heat exchange fluid of the solar water heater 60 can exchange heat with the first heat exchange pipe 41 through the second heat exchange pipe 42. And a water pump 63 is also provided on the heat exchange fluid line 62 to control the flow of heat exchange fluid into the second heat exchange line 42 of the fluorine water heat exchanger 40.
The application also provides a control method for defrosting of the air conditioner, which can be used for the air conditioner.
In some embodiments, as shown in fig. 4, embodiments of the present disclosure provide a control method for defrosting an air conditioner, including:
s101, under the condition that the air conditioner needs defrosting, obtaining the temperature of heat exchange fluid in a solar water heater and the temperature of refrigerant liquid inlet of a fluorine-water heat exchanger;
and S102, controlling the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the liquid inlet temperature of the refrigerant of the fluorine-water heat exchanger.
In the embodiment of the present disclosure, when the outdoor heat exchanger of the outdoor unit of the air conditioner is frosted, the outdoor environment is mostly in a severe working condition with a low temperature and a high humidity, and at this time, the user generally sets the air conditioner to operate in a heating mode to heat and warm the indoor environment by using the air conditioner. Therefore, the control method for defrosting the air conditioner provided by the embodiment of the disclosure is a control flow which is started when the air conditioner operates in a heating mode. Meanwhile, due to multiple defrosting modes, in order to achieve the effect of rapid defrosting, a reverse-cycle defrosting mode is preferentially adopted, namely, as shown in fig. 2 and 3, when the air conditioner performs reverse-cycle defrosting, a high-temperature refrigerant discharged by the compressor 30 firstly flows through the outdoor heat exchanger 30, so that the heat of the refrigerant is utilized to melt frost.
In this embodiment, whether the air conditioner needs to be defrosted is determined by comparing the outdoor ambient temperature with the frost point temperature. When the outdoor environment temperature is lower than the frost point temperature, the air conditioner is considered to need defrosting; when the outdoor ambient temperature is higher than the frost point temperature, the air conditioner is considered to be not required to defrost.
In this embodiment, whether the heat of the heat exchange fluid is transferred to the refrigerant of the air conditioner can be further controlled by controlling the on-off state of the water pump 63, that is, the frost formation on the outdoor heat exchanger 30 is prevented under the condition that the performance of the air conditioner is not affected, so that the refrigerant which finally flows into the outdoor heat exchanger 30 for defrosting can achieve a better defrosting effect.
In this embodiment, when the air conditioner needs to defrost, it is determined whether the heat exchange fluid in the solar water heater 60 needs to be introduced into the air conditioner to defrost, the liquid inlet temperature of the refrigerant of the fluorine water heat exchanger 40 and the temperature of the heat exchange fluid in the solar water heater 60 need to be obtained; and controlling the on-off state of the water pump according to the liquid inlet temperature of the refrigerant and the temperature of the heat exchange fluid.
Optionally, a first temperature sensor 72 is disposed at a refrigerant inlet pipe position of the fluorine-water heat exchanger 40, and the first temperature sensor 72 may be configured to detect a real-time temperature of the refrigerant inlet pipe position. Therefore, the refrigerant inlet temperature of the fluorine-water heat exchanger obtained in step S101 may be the real-time temperature of the refrigerant inlet pipeline position detected by the first temperature sensor 72.
Optionally, a third temperature sensor 61 is provided within the solar water heater 60, and the third temperature sensor 61 may be used to detect the real-time temperature of the heat exchange fluid within the solar water heater 60. Therefore, the temperature of the heat exchange fluid inside the solar water heater 60 acquired in step S101 may be the real-time temperature of the heat exchange fluid inside the solar water heater 60 detected by the third temperature sensor 61.
In the above embodiment, the first temperature sensor 72 is disposed on the first refrigerant pipe section 71, and at this time, the refrigerant flows from the first refrigerant pipe section 71 to the second refrigerant pipe section 73, so that the first temperature sensor 72 detects the refrigerant inlet temperature of the fluorine water heat exchanger 40.
The control method for defrosting the air conditioner provided by the embodiment of the disclosure is to obtain the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the refrigerant liquid inlet of the fluorine-water heat exchanger 40 under the condition that the air conditioner needs to be defrosted; the on-off state of the water pump 63 is controlled according to the temperature of the heat exchange fluid in the solar water heater 60 and the refrigerant inlet temperature of the fluorine water heat exchanger 40, so that whether the heat of the heat exchange fluid is transferred to the refrigerant of the air conditioner can be controlled, and the frosting on the outdoor heat exchanger is prevented under the condition that the performance of the air conditioner is not influenced.
Optionally, the controlling the on-off state of the water pump 63 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the refrigerant inlet of the fluorine water heat exchanger 40 includes:
when the temperature of the heat exchange fluid is higher than the inlet temperature of the refrigerant and the temperature difference between the temperature of the heat exchange fluid and the inlet temperature of the refrigerant is higher than a first temperature threshold, the water pump 63 is controlled to be in an on state.
In this embodiment, after the air conditioner runs and performs reverse defrosting and defrosting for a period of time, the temperature of the heat exchange fluid is greater than the liquid inlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid inlet temperature of the refrigerant is greater than the first temperature threshold value, at this time, the temperature of the liquid inlet refrigerant is lower, the temperature of the heat exchange fluid is higher, after heat exchange is performed through the first heat exchange pipeline 41 and the second heat exchange pipeline 42, the temperature of the refrigerant can be raised, and then the refrigerant flowing into the outdoor heat exchanger 30 can achieve a better defrosting effect.
In this embodiment, if the temperature of the heat exchange fluid is lower than or equal to the temperature of the liquid-feeding refrigerant or slightly higher than the temperature of the liquid-feeding refrigerant, at this time, the water pump 63 is turned on, and the heat exchange fluid may absorb part of the heat of the liquid-feeding refrigerant, so that the effect of rapid defrosting cannot be achieved, and therefore, the water pump 63 is turned off when the above conditions are not met.
In this embodiment, on one hand, to provide heat for the refrigerant by the heat exchange fluid and on the other hand, to prevent the water pump 63 from being frequently turned on or off, optionally, the set value of the first temperature threshold may be 10 ℃ to 80 ℃. Illustratively, the first temperature threshold may be any value selected from 10 ℃, 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 80 ℃. The first temperature threshold is here preferably 20 ℃.
Optionally, as shown in fig. 5, an embodiment of the present disclosure provides a control method for defrosting an air conditioner, including:
s201, under the condition that the water pump is in an on state, obtaining the refrigerant liquid outlet temperature of the fluorine-water heat exchanger 40;
and S202, controlling the on-off states of the second throttling element 81 and the third throttling element 91 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger 40.
Optionally, a second temperature sensor 74 is disposed at a position of the refrigerant outlet pipe of the fluorine-water heat exchanger 40, and the second temperature sensor 74 may be configured to detect a real-time temperature of the position of the refrigerant outlet pipe. Therefore, the refrigerant liquid outlet temperature of the fluorine-water heat exchanger 40 obtained in step S201 may be the real-time temperature of the refrigerant liquid outlet pipe position detected by the second temperature sensor 74.
In the above embodiment, the second temperature sensor 74 is disposed on the second refrigerant pipe segment 73, and at this time, the refrigerant flows from the first refrigerant pipe segment 71 to the second refrigerant pipe segment 73, so that the second temperature sensor 74 detects the refrigerant outlet liquid temperature of the fluorine water heat exchanger 40.
In this embodiment, when the water pump is in the on state, to further increase the defrosting speed of the outdoor heat exchanger, the on-off states of the second throttling element 81 and the third throttling element 91 are controlled according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger 40, that is, the refrigerant flows through the second refrigerant pipeline 80 and/or the third refrigerant pipeline 90, so that the refrigerant has sufficient heat to defrost.
Optionally, controlling the on-off states of the second throttling element 81 and the third throttling element 91 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger 40 includes:
and under the condition that the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is greater than a second temperature threshold, controlling the second throttling element 81 to be in a closed state and controlling the third throttling element 91 to be in an open state.
In this embodiment, if the temperature of the heat exchange fluid is high enough, the heat exchange fluid can provide enough defrosting heat for the refrigerant, and at this time, the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is greater than the second temperature threshold. At this time, the second throttling element 81 is in a closed state, that is, the second refrigerant pipeline 80 is closed, the third throttling element 91 is in an open state, the refrigerant directly passes through the third refrigerant pipeline 90, the heat of the refrigerant is sufficient for defrosting, and further, heat exchange with the indoor space is not performed, and defrosting is accelerated.
In this embodiment, on one hand, in order to enable the heat exchange fluid to provide heat for the refrigerant, optionally, the set value of the second temperature threshold may be 10 ℃ to 50 ℃. For example, the second temperature threshold may be any value selected from 10 ℃, 20 ℃, 30 ℃, 40 ℃ and 50 ℃. The second temperature threshold is preferably 10 ℃.
Optionally, the controlling the on-off states of the second throttling element 81 and the third throttling element 91 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the coolant outlet liquid of the fluorine water heat exchanger 40 further includes:
and under the condition that the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is smaller than a second temperature threshold, controlling the second throttling element 81 to be in an open state and the third throttling element 91 to be in a closed state.
In this embodiment, if the temperature of the heat exchange fluid is not very high and the difference between the temperature of the heat exchange fluid and the coolant outlet temperature is less than the second temperature threshold, at this time, the temperature of the heat exchange fluid is greater than the coolant outlet temperature, and the temperature difference between the temperature of the heat exchange fluid and the coolant outlet temperature is less than the second temperature threshold. At this time, the second throttling element 81 is in an open state, that is, the refrigerant directly passes through the indoor heat exchanger and the second refrigerant pipeline 80, and then exchanges heat with the indoor space, so that the heat in the indoor space is absorbed, the heat of the refrigerant is increased, and defrosting is accelerated.
Optionally, after controlling the on-off states of the second throttling element 81 and the third throttling element 91 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the coolant outlet liquid of the fluorine water heat exchanger 40, the method further includes: controlling the water pump 63 to be in a closed state under the condition that the temperature of the heat exchange fluid is less than or equal to the temperature of the refrigerant outlet liquid; generally, after the heat exchange fluid is transferred to the refrigerant, the temperature of the heat exchange fluid is reduced to be less than or equal to the temperature of the refrigerant outlet liquid. At this time, the water pump 63 needs to be turned off, the heat exchange fluid is continuously heated by the solar water heater 60, and when defrosting is needed, the water pump 63 is turned on again.
Alternatively, in the case where the air conditioner is stopped, such as when the air conditioner is normally stopped, or when the air conditioner is stopped due to a fault, the water pump 63 is controlled to be in a closed state; alternatively, in the case where the defrosting of the air conditioner is completed, the water pump 63 is controlled to be in an off state. To save energy consumption.
Optionally, as shown in fig. 6, an embodiment of the present disclosure provides a control method for defrosting an air conditioner, including:
s301, under the condition that the air conditioner needs to delay defrosting, obtaining the temperature of heat exchange fluid in the solar water heater 60 and the temperature of refrigerant outlet liquid of the fluorine water heat exchanger 40;
and S302, controlling the water pump 63 to be in an open state under the condition that the temperature of the heat exchange fluid is greater than the coolant outlet temperature and the temperature difference between the heat exchange fluid temperature and the coolant outlet temperature is greater than a third temperature threshold value.
In the present embodiment, when the air conditioner needs to perform the delay defrosting, the defrosting is not performed quickly in order to reduce the frosting speed of the outdoor heat exchanger, and therefore, the refrigerant can be heated by using the temperature of the heat exchange fluid in the solar water heater 60.
In this embodiment, when the temperature of the thermal fluid is greater than the coolant outlet temperature, it indicates that the heat exchange fluid can also be heated by the coolant, and the temperature difference between the temperature of the heat exchange fluid and the coolant outlet temperature is greater than the third temperature threshold, the water pump 63 is controlled to be in an on state, so that the defrosting can be delayed.
Alternatively, the set value of the third temperature threshold may be 10 ℃ to 50 ℃. For example, the third temperature threshold may be any value selected from 10 ℃, 20 ℃, 30 ℃, 40 ℃ and 50 ℃. The third temperature threshold here is preferably 10 ℃.
Optionally, under the condition that the temperature of the heat exchange fluid is lower than the outlet temperature of the refrigerant, at this time, the heat exchange fluid cannot provide heat for the refrigerant, and the water pump 63 needs to be controlled to be in a closed state.
In the above embodiment, the reverse cycle defrosting is generally taken as an example, but in a mode other than the reverse cycle defrosting, such as an air conditioner or a heating mode, the solar water heater 60 can also provide heat for the refrigerant flowing through the first heat exchange pipeline 41 when the refrigerant sequentially passes through the indoor heat exchanger 50, the fluorine water heat exchanger 40 and the outdoor heat exchanger 50, so as to achieve the purpose of defrosting the outdoor heat exchanger 50.
In the above embodiment, the heat exchange fluid in the solar water heater 60 is water. After the solar water heater 60 is used for heating water, the water can be added into an air conditioning unit besides domestic water to heat a refrigerant of the air conditioning unit and the like. Here, the user can set the hot water of the solar water heater 60 to be used for domestic water or to be used for air conditioning defrosting, etc. by himself.
In the above embodiment, when the air conditioner operates the cooling mode and the water temperature of the solar water heater 60 is low; or, in case that the user uses a lot of hot water and needs to supply cold water to the solar water heater 60 frequently and the supplied cold water is lower than the refrigerant passing through the fluorine water heat exchanger 40, the water pump 63 may be turned on to supercool the refrigerant passing through the fluorine water heat exchanger 40, and the water pump 63 may be turned off when the temperature of the water in the solar water heater 60 gradually approaches the refrigerant passing through the fluorine water heat exchanger 40.
For example, the temperature of the cold water supplied to the solar water heater 60 is 20 ℃, and the temperature of the refrigerant flowing through the fluorine water heat exchanger 40 is between 35 ℃ and 45 ℃, so that the water pump 63 is started, and the cold water supplied to the solar water heater exchanges heat with the refrigerant flowing through the fluorine water heat exchanger 40, thereby increasing the heating rate of the solar water heater 60, lowering the temperature of the refrigerant flowing through the indoor heat exchanger, improving the refrigeration effect, improving the energy efficiency of the air conditioner and the solar water heater, and saving energy.
Referring to fig. 7, an embodiment of the present disclosure provides a control device for defrosting an air conditioner, which includes a temperature obtaining module 401 and a first state adjusting module 402. The temperature obtaining module 401 is configured to obtain the temperature of the heat exchange fluid in the solar water heater 60 and the liquid inlet temperature of the refrigerant of the fluorine-water heat exchanger 40 when the air conditioner needs to be defrosted; the first state adjustment module 402 is configured to control the on/off state of the water pump 63 according to the temperature of the heat exchange fluid in the solar water heater 60 and the refrigerant inlet temperature of the fluorine-water heat exchanger 40.
Optionally, the first state adjustment module 402 is specifically configured to control the water pump 63 to be in an on state when the temperature of the heat exchange fluid is greater than the refrigerant inlet temperature, and the temperature difference between the temperature of the heat exchange fluid and the refrigerant inlet temperature is greater than a first temperature threshold.
Optionally, the temperature obtaining module 401 is specifically configured to obtain the coolant liquid outlet temperature of the fluorine-water heat exchanger 40 when the water pump 63 is in an on state; the apparatus further comprises a second state adjusting module 403 configured to control the on/off states of the second throttling element 81 and the third throttling element 91 according to the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the coolant outlet liquid of the fluorine water heat exchanger 40.
Optionally, the second state adjusting module 403 is specifically configured to control the second throttling element 81 to be in a closed state and the third throttling element 91 to be in an open state when the temperature of the heat exchange fluid is greater than the refrigerant outlet temperature and the temperature difference between the temperature of the heat exchange fluid and the refrigerant outlet temperature is greater than a second temperature threshold; under the condition that the temperature of the heat exchange fluid is higher than the refrigerant liquid outlet temperature and the temperature difference between the temperature of the heat exchange fluid and the refrigerant liquid outlet temperature is lower than a second temperature threshold, controlling the second throttling element 81 to be in an open state and the third throttling element 91 to be in a closed state;
optionally, the first state adjustment module 402 is further specifically configured to control the water pump 63 to be in a closed state when the temperature of the heat exchange fluid is less than or equal to the temperature of the coolant outlet liquid; or, in case of the air conditioner being stopped, the water pump 63 is controlled to be in a closed state; or, in case the defrosting of the air conditioner is completed, the water pump 63 is controlled to be in a closed state.
Optionally, the temperature obtaining module 401 is further specifically configured to obtain the temperature of the heat exchange fluid in the solar water heater 60 and the temperature of the coolant outlet liquid of the fluorine-water heat exchanger 40 when the air conditioner needs to perform the delay defrosting;
the first state adjustment module 402 is further specifically configured to control the water pump 63 to be in an on state when the heat exchange fluid temperature is greater than the refrigerant outlet temperature, and a temperature difference between the heat exchange fluid temperature and the refrigerant outlet temperature is greater than a third temperature threshold.
By adopting the control device for defrosting the air conditioner, provided by the embodiment of the disclosure, the defrosting can be performed by effectively utilizing solar energy, and meanwhile, the heat exchange area of the outdoor heat exchanger is not influenced, so that the energy efficiency of the system is improved.
It is understood that the embodiments of the control method for defrosting an air conditioner can also be applied to the control device for defrosting an air conditioner, and are not described herein again.
As shown in fig. 8, an embodiment of the present disclosure provides a control device for defrosting an air conditioner, which includes a processor (processor) 500 and a memory (memory) 501. Optionally, the apparatus may also include a Communication Interface 502 and a bus 503. The processor 500, the communication interface 502, and the memory 501 may communicate with each other via a bus 503. Communication interface 502 may be used for information transfer. The processor 500 may call logic instructions in the memory 501 to perform the control method for defrosting an air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 501 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 501 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 500 executes functional applications and data processing by executing program instructions/modules stored in the memory 501, that is, implements the control method for air conditioner defrosting in the above-described embodiment.
The memory 501 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 501 may include a high-speed random access memory and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the control device for defrosting of the air conditioner.
The embodiment of the disclosure provides a computer-readable storage medium storing computer-executable instructions configured to execute the control method for defrosting an air conditioner.
An embodiment of the present disclosure provides a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to execute the above control method for defrosting an air conditioner.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description for example only and are not limiting upon the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In the embodiments of the present disclosure, each embodiment may be different from the other embodiments in terms of emphasis, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed in the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method for defrosting of an air conditioner is characterized in that the air conditioner comprises an outdoor heat exchanger, a first refrigerant pipeline and an indoor heat exchanger which are sequentially connected; the system also comprises a fluorine water heat exchanger and a solar water heater, wherein the fluorine water heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline which can exchange heat with each other, and the first heat exchange pipeline is connected in series with the first refrigerant pipeline; the solar water heater comprises a heat exchange fluid pipeline communicated with the second heat exchange pipeline; a water pump for limiting the heat exchange fluid to flow from the solar water heater to the fluorine water heat exchanger is arranged on the heat exchange fluid pipeline;
the control method comprises the following steps:
under the condition that an air conditioner needs defrosting, the temperature of heat exchange fluid in the solar water heater and the temperature of refrigerant liquid inlet of the fluorine-water heat exchanger are obtained;
and controlling the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant liquid inlet of the fluorine-water heat exchanger.
2. The control method according to claim 1, wherein controlling the on-off state of the water pump according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant inlet of the fluorine-water heat exchanger comprises:
and controlling the water pump to be in an open state under the conditions that the temperature of the heat exchange fluid is greater than the liquid inlet temperature of the refrigerant and the temperature difference between the temperature of the heat exchange fluid and the liquid inlet temperature of the refrigerant is greater than a first temperature threshold value.
3. The control method according to claim 2, wherein the air conditioner further comprises a second refrigerant pipeline and a third refrigerant pipeline, one end of the second refrigerant pipeline is connected with the indoor heat exchanger, the other end of the second refrigerant pipeline is connected with the outdoor heat exchanger, and a second throttling element is arranged on the second refrigerant pipeline; one end of the third refrigerant pipeline is connected to a second refrigerant pipe section between the indoor heat exchanger and the fluorine water heat exchanger, the other end of the third refrigerant pipeline is connected to a refrigerant pipe section between the second throttling element and the outdoor heat exchanger, and a third throttling element is arranged on the third refrigerant pipeline;
the control method further comprises the following steps:
under the condition that the water pump is in an open state, the temperature of the refrigerant outlet liquid of the fluorine-water heat exchanger is obtained;
and controlling the on-off states of the second throttling element and the third throttling element according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger.
4. The control method according to claim 3, wherein controlling the on-off states of the second throttling element and the third throttling element according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger comprises:
and under the condition that the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is greater than a second temperature threshold value, controlling the second throttling element to be in a closed state and controlling the third throttling element to be in an open state.
5. The control method according to claim 4, wherein the on-off states of the second throttling element and the third throttling element are controlled according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger, and further comprising:
and under the condition that the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is smaller than a second temperature threshold value, controlling the second throttling element to be in an open state and the third throttling element to be in a closed state.
6. The control method according to claim 5, wherein after controlling the on-off states of the second throttling element and the third throttling element according to the temperature of the heat exchange fluid in the solar water heater and the temperature of the refrigerant outlet liquid of the fluorine water heat exchanger, the method further comprises:
controlling the water pump to be in a closed state under the condition that the temperature of the heat exchange fluid is less than or equal to the temperature of the refrigerant outlet liquid; or the like, or a combination thereof,
under the condition that the air conditioner is stopped, controlling the water pump to be in a closed state; or the like, or, alternatively,
and under the condition that the defrosting of the air conditioner is finished, controlling the water pump to be in a closed state.
7. The control method according to claim 1, characterized by further comprising:
under the condition that the air conditioner needs to delay defrosting, the temperature of heat exchange fluid in the solar water heater and the temperature of refrigerant outlet liquid of the fluorine water heat exchanger are obtained;
and under the condition that the temperature of the heat exchange fluid is greater than the liquid outlet temperature of the refrigerant, and the temperature difference value between the temperature of the heat exchange fluid and the liquid outlet temperature of the refrigerant is greater than a third temperature threshold value, controlling the water pump to be in an opening state.
8. A control device for defrosting of an air conditioner is characterized in that the air conditioner comprises an outdoor heat exchanger, a first refrigerant pipeline and an indoor heat exchanger which are sequentially connected; the system also comprises a fluorine water heat exchanger and a solar water heater, wherein the fluorine water heat exchanger comprises a first heat exchange pipeline and a second heat exchange pipeline which can exchange heat with each other, and the first heat exchange pipeline is connected in series with the first refrigerant pipeline; the solar water heater comprises a heat exchange fluid pipeline communicated with the second heat exchange pipeline; a water pump for limiting the heat exchange fluid to flow from the solar water heater to the fluorine water heat exchanger is arranged on the heat exchange fluid pipeline;
the control device includes:
the temperature acquisition module is configured to acquire the temperature of heat exchange fluid in the solar water heater and the liquid inlet temperature of a refrigerant of the fluorine-water heat exchanger under the condition that an air conditioner needs to be defrosted;
the first state adjusting module is configured to control the on-off state of the water pump according to the temperature of heat exchange fluid in the solar water heater and the temperature of refrigerant liquid inlet of the fluorine-water heat exchanger.
9. A control apparatus for defrosting of an air conditioner, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for defrosting of an air conditioner according to any one of claims 1 to 7 when executing the program instructions.
10. An air conditioner characterized by comprising the control device for defrosting of an air conditioner according to claim 8 or 9.
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| CN202210776936.8A CN115183402A (en) | 2022-07-04 | 2022-07-04 | Control method and control device for defrosting of air conditioner and air conditioner |
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| CN202210776936.8A CN115183402A (en) | 2022-07-04 | 2022-07-04 | Control method and control device for defrosting of air conditioner and air conditioner |
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