Method and apparatus for controlling air conditioner, air conditioner, and storage medium

Abstract

The present application relates to the technical field of smart home appliances, and discloses an air conditioner. The air conditioner comprises: an outdoor heat exchanger, an indoor heat exchanger, a throttling apparatus, and a first refrigerant pipe section communicating the indoor heat exchanger and the throttling apparatus. The air conditioner further comprises: circulating piping, in which a flowable heat exchange medium is provided. The circulating piping comprises: a first heat exchange pipe section for heat exchange with the first refrigerant pipe section, and a second heat exchange pipe section for heat exchange with the outdoor heat exchanger; and a water pump, disposed in the circulating piping, the water pump driving the heat exchange medium to circulate in the circulating piping when the water pump operates, wherein when the air conditioner operates to produce heat, the heat exchange medium heats up after passing through the first heat exchange pipe section and heats the outdoor heat exchanger when passing through the second heat exchange pipe section. In a heat producing process of the air conditioner, the circulating piping exchanges heat with a high-temperature refrigerant indoors to collect heat, and exchanges heat with the outdoor heat exchanger outdoors, so that the temperature of the outdoor heat exchanger is increased and the possibility of air conditioning frosting is reduced.

Description

Method and device for controlling air conditioner, air conditioner, and storage medium

[0001] This application is based on the Chinese patent application with application number 202311132144.8 and application date September 4, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of smart home appliances, and in particular to a method and device for controlling an air conditioner, an air conditioner, and a storage medium. Background Art

[0003] Air conditioners are now widely used in most parts of my country. This is especially true in southern China, where centralized heating is not available. People rely heavily on air conditioners for warmth in winter. However, when the air conditioner is heating, the outdoor heat exchanger temperature is relatively low. When the temperature falls below the dew point, condensation forms on the surface of the outdoor heat exchanger. If the heating system is running for extended periods, this condensation will form frost on the surface of the outdoor heat exchanger, affecting the heat exchange efficiency of the air conditioner.

[0004] To address the issue of frosting during air conditioning, a related technology incorporates a compressor waste heat recovery channel within the air conditioner. This channel is equipped with a compressor waste heat recovery fan and a horizontal heat pipe. The compressor waste heat recovery fan directs air from the channel through the compressor casing. The heated air then flows through the horizontal heat pipe, raising the temperature of the working fluid in the horizontal heat pipe and, in turn, heating the air entering the outdoor heat exchanger. This elevated temperature defrosts the air conditioner or allows for frost-free operation.

[0005] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0006] The related art is to use the heat generated by the compressor in the air conditioner to defrost the outdoor heat exchanger. However, in many cases, the heat generated by the compressor is not sufficient to achieve the purpose of defrosting the air conditioner, resulting in poor defrosting effect of the air conditioner.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field.

[0008] Summary of the Invention

[0009] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0010] Embodiments of the present disclosure provide a method and apparatus for controlling an air conditioner, an air conditioner, and a storage medium, which can improve the defrosting effect of the air conditioner.

[0011] In some embodiments, an air conditioner is provided, which includes an outdoor heat exchanger, an indoor heat exchanger, a throttling device, a first refrigerant pipe section connecting the indoor heat exchanger and the throttling device, and also includes: a circulation pipeline with a flowable heat exchange medium inside, the circulation pipeline including: a first heat exchange pipe section for exchanging heat with the first refrigerant pipe section, and a second heat exchange pipe section for exchanging heat with the outdoor heat exchanger; a water pump, which is arranged in the circulation pipeline, and drives the heat exchange medium to circulate in the circulation pipeline when the water pump is running; wherein, when the air conditioner is in heating operation, the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0012] The air conditioner is equipped with a circulation pipeline that exchanges heat with the refrigerant. This circulation pipeline exchanges heat with the high-temperature refrigerant indoors to collect heat, and then exchanges heat with the outdoor heat exchanger outdoors, raising the temperature of the outdoor heat exchanger. During heating operation, the heat generated by the refrigerant indoors is higher than that generated by the compressor, which improves the defrosting effect on the outdoor heat exchanger.

[0013] Optionally, the air conditioner also includes: a hot water storage tank, including a first water pipe and a second water pipe, the first water pipe is connected to one end of the first heat exchange pipe section, and the second water pipe is connected to the other end of the first heat exchange pipe section; a first valve is provided at one end of the first heat exchange pipe section, and when the first valve is opened, the heat exchange medium in the circulation pipeline completes heat exchange in the first heat exchange pipe section and flows through the second heat exchange pipe section to heat the outdoor heat exchanger; a second valve is provided on the first water pipe, and when the second valve is opened, the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe, and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0014] Optionally, the air conditioner further comprises: a third valve provided on the second water pipe, and when the third valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the hot water storage tank through the second water pipe.

[0015] Optionally, the air conditioner also includes: a fan coil unit, including a third water pipe, a fourth water pipe, and a connecting pipe section connecting the expansion water tank and the coil, one end of the third water pipe is connected to an end of the connecting pipe section close to the coil, and the other end is connected to one end of the first heat exchange pipe section; one end of the fourth water pipe is connected to an end of the connecting pipe section away from the coil, and the other end is connected to the other end of the first heat exchange pipe section; a fourth valve is provided on the third water pipe, and when the fourth valve is opened, the heat exchange medium in the fan coil unit enters the circulation pipeline through the third water pipe, and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0016] Optionally, the air conditioner further comprises: a fifth valve provided on the fourth water pipe, and when the fifth valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the fan coil unit through the fourth water pipe.

[0017] In some embodiments, a method for controlling an air conditioner is provided, wherein the air conditioner includes an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a first refrigerant pipe section connecting the indoor heat exchanger and the throttling device; a circulation pipeline with a flowable heat exchange medium inside, the circulation pipeline including: a first heat exchange pipe section for exchanging heat with the first refrigerant pipe section, and a second heat exchange pipe section for exchanging heat with the outdoor heat exchanger; a water pump is arranged in the circulation pipeline, and when the water pump is running, it drives the heat exchange medium to circulate in the circulation pipeline; the method for controlling the air conditioner includes: in the case of heating operation, detecting outdoor environmental parameters; according to the outdoor environmental parameters, controlling the operation of the water pump, so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0018] Optionally, the outdoor environmental parameters include the outdoor ambient temperature, and controlling the operation of the water pump according to the outdoor environmental parameters includes: detecting the temperature of the heat exchange medium when it enters the second heat exchange pipe section; when Tw≥Tao, controlling the operation of the water pump according to the evaporation temperature of the outdoor heat exchanger; wherein Tw represents the temperature of the heat exchange medium when it enters the second heat exchange pipe section, and Tao represents the outdoor ambient temperature.

[0019] Optionally, controlling the operation of the water pump according to the evaporation temperature of the outdoor heat exchanger includes:

[0020] When Ts≤To, the water pump is operated; or when Ts>To, the water pump is stopped; wherein Ts represents the evaporation temperature of the outdoor heat exchanger, and To represents the first temperature.

[0021] Optionally, the outdoor environmental parameters also include the relative humidity of the outdoor environment, and controlling the operation of the water pump according to the outdoor environmental parameters also includes: when Tw<Tao, calculating the dew point temperature according to Tao and RH; when Tw>Td, controlling the water pump to continue running; wherein RH represents the relative humidity of the outdoor environment, and Td represents the dew point temperature.

[0022] Optionally, the method for controlling the air conditioner further includes: when the water pump is running, if the heat exchange medium in the circulation pipeline does not provide sufficient heat to the outdoor heat exchanger, obtaining the compressor frequency; when the compressor frequency is less than the frequency upper limit value, increasing the compressor frequency.

[0023] Optionally, the air conditioner further includes: a hot water storage tank, including a first water pipe and a second water pipe, the first water pipe being connected to one end of the first heat exchange pipe section, and the second water pipe being connected to the other end of the first heat exchange pipe section; a first valve being provided at one end of the first heat exchange pipe section, and when the first valve is opened, the heat exchange medium in the circulation pipeline completes heat exchange in the first heat exchange pipe section and then flows through the second heat exchange pipe section to heat the outdoor heat exchanger; a second valve being provided at the first water pipe, and when the second valve is opened, the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section; the method further includes: when the compressor frequency is greater than or equal to the frequency upper limit value, detecting the temperature of the heat exchange medium in the hot water storage tank; and determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the hot water storage tank.

[0024] Optionally, the air conditioner further comprises: a third valve provided on the second water pipe, and when the third valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the hot water storage tank through the second water pipe; the heat source for heating the outdoor heat exchanger is determined according to the temperature of the heat exchange medium in the hot water storage tank, comprising: when Tx>T2, opening the second valve and the third valve, closing the first valve, so that the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe, and using the heat exchange medium in the hot water storage tank as the heat source for heating the outdoor heat exchanger; when T3<Tx≤T2, using the heat exchange medium in the hot water storage tank as part of the heat source for heating the outdoor heat exchanger; wherein Tx represents the temperature of the heat exchange medium in the hot water storage tank, T2 represents the maximum temperature at which the heat exchange medium in the hot water storage tank can reach the defrost condition, and T3 represents the minimum temperature at which the heat exchange medium in the hot water storage tank can reach the defrost condition.

[0025] Optionally, the air conditioner further includes: a fan coil unit, including a third water pipe, a fourth water pipe, and a connecting pipe section connecting the expansion tank and the coil. One end of the third water pipe is connected to one end of the connecting pipe section close to the coil, and the other end is connected to one end of the first heat exchange pipe section; one end of the fourth water pipe is connected to the end of the connecting pipe section far from the coil, and the other end is connected to the other end of the first heat exchange pipe section;

[0026] A fourth valve is provided on the third water pipe. When the fourth valve is opened, the heat exchange medium in the coil enters the circulation pipeline through the third water pipe and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section; the method further includes: when the compressor frequency is greater than or equal to the upper limit value of the frequency, detecting the temperature of the heat exchange medium in the coil; determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil.

[0027] The air conditioner further includes: a fifth valve provided on the fourth water pipe. When the fifth valve is opened, a part of the heat exchange medium flowing out of the second heat exchange pipe section flows back into the coil through the fourth water pipe; the determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil includes: when Ty≥T4, opening the fourth valve and the fifth valve, closing the first valve, and making the heat exchange medium in the coil enter the circulation pipeline through the third water pipe, and using the heat exchange medium in the coil as the heat source for heating the outdoor heat exchanger; when T5≤Ty<T4, using the heat exchange medium in the coil as a part of the heat source for heating the outdoor heat exchanger; where Ty represents the detected temperature of the heat exchange medium in the coil, T4 represents the highest temperature at which the heat exchange medium in the coil can reach the defrosting condition, and T5 represents the lowest temperature at which the heat exchange medium in the coil can reach the defrosting condition.

[0028] In some embodiments, a device for controlling an air conditioner is provided, including a processor and a memory storing program instructions. The processor is configured to execute the above method for controlling an air conditioner when running the program instructions.

[0029] In some embodiments, a storage medium is provided, storing program instructions. When the program instructions are running, they execute the above method for controlling an air conditioner. In some embodiments, a storage medium is provided, storing program instructions. When the program instructions are running, they execute the above method for controlling an air conditioner. Description of the Drawings

[0030] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are regarded as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0031] FIG1 is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0032] FIG2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0033] FIG3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0034] FIG4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0035] FIG5 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0036] FIG6 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0037] FIG7 a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0038] FIG7 b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0039] FIG8a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0040] FIG8 b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0041] FIG9a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0042] FIG9 b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0043] FIG10 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0044] FIG11 is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0046] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0048] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0049] Unless otherwise stated, the term "plurality" means two or more.

[0050] 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 means: A or B.

[0051] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0053] As shown in Figure 1, the air conditioner provided by the embodiment of the present disclosure includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a throttling device 4, an outdoor heat exchanger 5, a first refrigerant pipe section 10 connecting the indoor heat exchanger 3 and the throttling device 4, a circulation pipeline 6 and a water pump 7. Among them, there is a flowable heat exchange medium inside the circulation pipeline 6. The circulation pipeline 6 includes a first heat exchange pipe section 11 and a second heat exchange pipe section 12. The first heat exchange pipe section 11 can exchange heat with the first refrigerant pipe section 10. The second heat exchange pipe section 12 can exchange heat with the outdoor heat exchanger 5. The water pump 7 is arranged in the circulation pipeline 6. When the water pump 7 is in operation, it drives the heat exchange medium to circulate in the circulation pipeline 6.

[0054] During heating operation, the high-temperature gaseous refrigerant generated by the compressor 1 enters the indoor heat exchanger 3 through the four-way valve 2, and after completing heat exchange in the indoor heat exchanger 3, it flows out in the form of high-temperature liquid refrigerant and enters the first refrigerant pipe section 10. By adding a circulation pipeline 6, the heat exchange medium exchanges heat with the high-temperature liquid refrigerant in the first refrigerant pipe section 10 through the first heat exchange pipe section 11 in the circulation pipeline 6. After the heat exchange medium absorbs the heat of the refrigerant and its temperature rises, it is pushed by the water pump 7 to enter the outdoor heat exchanger 5 and heat the outdoor heat exchanger 5 through the second heat exchange pipe section 12. After the heat exchange medium transfers heat to the outdoor heat exchanger 5, its temperature drops and it returns to the first heat exchange pipe section 11, where it exchanges heat with the high-temperature liquid refrigerant in the first refrigerant pipe section 10 again. This reciprocating cycle flows.

[0055] Optionally, the heat exchange medium in the first heat exchange pipe segment 11 and the refrigerant in the first refrigerant pipe segment 10 exchange heat through a double-tube heat exchanger. A double-tube heat exchanger includes an outer tube and an inner tube, with the outer tube being enclosed within the inner tube. In the disclosed embodiment, the first refrigerant pipe segment 10 serves as the inner tube, and the first heat exchange pipe segment 11 serves as the outer tube, allowing the heat exchange medium and the refrigerant to exchange heat through the inner and outer tubes in the double-tube heat exchanger.

[0056] Optionally, the heat exchange medium in the first heat exchange pipe segment 11 and the refrigerant in the first refrigerant pipe segment 10 exchange heat through a plate heat exchanger. The plate heat exchanger has channels for heat exchange between the heat exchange medium and the refrigerant. The first heat exchange pipe segment 11 serves as one channel in the plate heat exchanger, and the first refrigerant pipe segment 10 serves as another channel in the plate heat exchanger. Heat is exchanged between the heat exchange medium and the refrigerant in the plate heat exchanger through the channels formed by the heat exchange plates.

[0057] In the above-mentioned air conditioner provided by the embodiment of the present disclosure, the water pump 7 does not run in the cooling state. The system operation is similar to that of a conventional air-conditioning system. In the heating state, the water pump 7 runs, the indoor heat exchanger 3 acts as a condenser, and the outdoor heat exchanger 5 acts as an evaporator. The refrigerant is compressed by the compressor 1 and reaches the indoor heat exchanger 3 through the four-way valve 2 to exchange heat with the indoor air; the high-temperature and high-pressure supercooled liquid refrigerant after condensation enters the first refrigerant pipe section 10, and exchanges heat with the heat exchange medium in the first heat exchange pipe section 11 of the additional circulation pipeline 6, the waste heat of the refrigerant is recovered, and the degree of supercooling is increased. The refrigerant flowing out of the first refrigerant pipe section 10 enters the throttling device 4 for throttling and pressure reduction, and then exchanges heat with the heat exchange medium in the second heat exchange pipe section 12 and the surrounding environment in the outdoor heat exchanger 5. The evaporated gaseous refrigerant returns to the suction side of the compressor through the four-way valve 2 to form a refrigerant cycle. The heat exchange medium in the circulation pipeline 6 absorbs heat in the first heat exchange pipe section 11 and its temperature rises. Then, it is pushed by the water pump 7 to flow through the second heat exchange pipe section 12 to exchange heat with the low-temperature refrigerant. After the temperature drops, it returns to the first heat exchange pipe section 11 through the pipeline to exchange heat with the refrigerant in the first refrigerant pipe section 10 again to increase the temperature, forming a heat exchange medium circulation.

[0058] Optionally, the heat exchange medium includes antifreeze. In the disclosed embodiment, the heat exchange medium includes ethylene glycol, such as an ethylene glycol aqueous solution. The ethylene glycol aqueous solution has a low freezing point and is not easy to freeze.

[0059] Optionally, the water pump 7 is configured to controllably regulate the flow rate of the heat exchange medium. By regulating the flow rate of the heat exchange medium, the temperature of the heat exchange medium entering the second heat exchange pipe section 12 can be regulated, thereby achieving a controllable increase in the temperature of the fins of the outdoor heat exchanger 5 and achieving the corresponding frost suppression function.

[0060] In the air conditioner provided by the disclosed embodiment, the heat exchange medium in the circulation line 6, which absorbs heat and increases in temperature at the first heat exchange section 11, can heat the fins of the outdoor heat exchanger 5 at the second heat exchange section 12 through heat exchange, thereby reducing the possibility of frost on the outdoor heat exchanger fins. Because the waste heat generated by condensation of the refrigerant during the air conditioner's heating process is more abundant than the waste heat generated by the compressor, utilizing this waste heat can more effectively defrost the outdoor heat exchanger, thereby improving the defrosting effect of the air conditioner.

[0061] In conjunction with the air conditioner shown in FIG1 , an embodiment of the present disclosure provides a method for controlling the air conditioner. As shown in FIG2 , the method includes:

[0062] In step S201 , the air conditioner detects outdoor environmental parameters when operating in heating mode.

[0063] Heating operation refers to the air conditioner's operating mode, where the indoor heat exchanger acts as the condenser and the outdoor heat exchanger acts as the evaporator. This includes the air conditioner's heating function, the warming phase of the self-cleaning function, and the heating and warming phase of other functional modes.

[0064] In step S202, the air conditioner controls the operation of the water pump according to outdoor environmental parameters, so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0065] When the air conditioner is operating in heating mode, the water pump is controlled by detecting outdoor environmental parameters. The heat exchange medium, heated in the first heat exchange tube section, is pushed by the water pump into the outdoor heat exchanger, where it heats the outdoor heat exchanger, thereby defrosting the air conditioner or enabling frost-free operation.

[0066] FIG3 is another method for controlling an air conditioner provided by an embodiment of the present disclosure, the method comprising:

[0067] Step S301 : The air conditioner detects outdoor environmental parameters when operating in heating mode.

[0068] The outdoor environmental parameters include the outdoor ambient temperature and the outdoor ambient relative humidity.

[0069] In step S302, the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0070] Step S303: When Tw≥Tao, the air conditioner controls the water pump to operate according to the evaporation temperature of the outdoor heat exchanger, where Tao represents the outdoor ambient temperature.

[0071] If Tw ≥ Tao, meaning the temperature of the heat exchange medium upon entering the second heat exchange tube section is greater than the outdoor ambient temperature, this indicates that the heat exchange medium entering the second heat exchange tube section will dissipate heat to the outdoor environment during heat exchange, resulting in heat loss from the air conditioner. Therefore, to reduce heat loss to the outdoor environment, the evaporation temperature of the outdoor heat exchanger is used to determine whether the air conditioner has reached defrost conditions. When defrosting is required, the water pump is started to circulate the heat exchange medium and defrost the outdoor heat exchanger. If defrosting is not required, the water pump is stopped to reduce heat loss to the outdoor environment. In other words, when Tw ≥ Tao, the air conditioner operates in intermittent defrost mode, alternating between heating and defrosting modes.

[0072] In step S304, when Tw < Tao, the air conditioner controls the water pump to operate according to Tao and RH, where RH represents the relative humidity of the outdoor environment.

[0073] If Tw < Tao, the temperature of the heat exchange medium upon entering the second heat exchange segment is less than or equal to the outdoor ambient temperature. This indicates that the heat exchange medium entering the second heat exchange segment will not dissipate heat to the outdoor environment during heat exchange. Therefore, the air conditioner will not lose heat due to the water pump being turned on. In this case, the water pump can be controlled to run continuously based on Tao and RH, achieving frost-free operation.

[0074] The air conditioner determines whether the conditions for water pump operation are met based on the temperature of the heat exchange medium entering the second heat exchange pipe section and the outdoor ambient temperature. If the conditions are met, the water pump is operated, causing the heat exchange medium to heat up after flowing through the first heat exchange pipe section and heat the outdoor heat exchanger as it flows through the second heat exchange pipe section. This allows the air conditioner to defrost or achieve frost-free operation.

[0075] The following describes how to control the operation of the water pump when Tw≥Tao with reference to specific embodiments.

[0076] FIG4 is another method for controlling an air conditioner provided by an embodiment of the present disclosure, the method comprising:

[0077] In step S401, the air conditioner detects the outdoor ambient temperature Tao when the air conditioner is in heating operation.

[0078] In step S402, the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0079] Step S403: If Tw≥Tao, the air conditioner obtains the evaporation temperature Ts of the outdoor heat exchanger. Otherwise, the process returns to step S401.

[0080] Step S404: When Ts≤To, the air conditioner operates the water pump, where To represents the first temperature.

[0081] The first temperature is the temperature at which frost forms on the outdoor heat exchanger. If Ts ≤ To, meaning the evaporation temperature of the outdoor heat exchanger is less than or equal to the frosting temperature, the air conditioner has reached defrost conditions. The water pump is then controlled to operate for defrosting. Otherwise, the process returns to step S401 and continues to monitor outdoor environmental parameters. Optionally, To ≈ Tao - 10°C.

[0082] Specifically, when Tao=0°C, To is approximately -10°C.

[0083] Step S405: If Ts>To, the air conditioner stops the water pump.

[0084] Optionally, after controlling the water pump to operate or stop operating, the method further includes: returning to step S404 after a set time period, and continuing to control the water pump according to the numerical relationship between Ts and To.

[0085] When it is determined that the outdoor heat exchanger has been frosted, the water pump is started to operate, so that the heat exchange medium flows through the first heat exchange pipe section and is heated, and when flowing through the second heat exchange pipe section, the outdoor heat exchanger is heated to defrost the outdoor heat exchanger.

[0086] After the water pump starts running, if Ts > To, meaning the evaporating temperature of the outdoor heat exchanger is higher than the temperature at which frost has formed on the outdoor heat exchanger, the air conditioner has completed defrosting. The water pump is then controlled to stop, preventing the heat exchange medium from circulating in the circulation piping, and the air conditioner stops defrosting. After setting the duration, the process returns to step S404, where the water pump continues to be controlled based on the numerical relationship between Ts and To, switching between starting and stopping the water pump. While the water pump is running, the outdoor heat exchanger is defrosted, achieving alternating operation between heating and defrosting modes, and implementing intermittent defrosting.

[0087] The disclosed embodiment determines whether the conditions for water pump operation are met based on the evaporation temperature of the outdoor heat exchanger and the temperature at which the outdoor heat exchanger has frosted. If the conditions for water pump operation are met, the water pump is operated so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section to defrost the air conditioner. During the operation of the water pump, it is determined whether the air conditioner has completed defrosting. If defrosting is completed, the water pump is stopped. By alternating defrosting, the water pump is operated when the air conditioner needs to be defrosted. The heat exchange medium circulates to defrost the outdoor heat exchanger. If defrosting is completed, the water pump is stopped to reduce heat loss from the air conditioner.

[0088] The following describes how to control the operation of the water pump when Tw is less than Tao in conjunction with a specific embodiment.

[0089] FIG5 is another method for controlling an air conditioner provided by an embodiment of the present disclosure, the method comprising:

[0090] In step S501, the air conditioner detects the outdoor ambient temperature Tao and the outdoor relative humidity RH when the air conditioner is in heating operation.

[0091] In step S502, the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0092] In step S503, the air conditioner calculates Td based on Tao and RH when Tw < Tao, where Td represents the dew point temperature.

[0093] The dew point temperature, Td, is calculated using the Magnus-Tetens approximation method. Substitute Tao for T and RH for RH in the formula.

[0094] Wherein, T is the outdoor ambient temperature, RH is the outdoor ambient relative humidity, a is the first constant, b is the second constant, ln is the natural logarithm; 0<a<b.

[0095] Step S504: If Tw>Td, the air conditioner controls the water pump to continue running. Otherwise, the process returns to step S501 to continue testing.

[0096] If Tw > Td, the temperature of the heat exchange medium entering the second heat exchange pipe section is higher than the dew point. This indicates that the heat exchange between the heat exchange medium and the outdoor heat exchanger may cause the outdoor heat exchanger's temperature to exceed the dew point. When the outdoor heat exchanger's temperature is higher than the dew point, frost will not form on the surface. Therefore, if Tw > Td, the water pump is controlled to continue operating and the next step is executed. Otherwise, the process returns to step S501 to continue monitoring outdoor environmental parameters.

[0097] If it is determined that the heat exchange medium may cause the temperature of the outdoor heat exchanger to exceed the dew point temperature, the air conditioner controls the water pump to continue running. This causes the heat exchange medium to heat up after flowing through the first heat exchange pipe section and heat the outdoor heat exchanger when flowing through the second heat exchange pipe section, thereby achieving frost-free operation of the air conditioner.

[0098] Optionally, controlling the water pump to continuously operate includes: reducing the operating frequency of the water pump so that the evaporation temperature of the outdoor heat exchanger is higher than the second temperature.

[0099] The second temperature is the temperature at which frost begins to form on the outdoor heat exchanger. By reducing the operating frequency of the water pump, the temperature of the heat exchange medium is lowered to a level above the outdoor heat exchanger's frost-initiating temperature. This prevents frost formation on the air conditioner while also reducing the power consumption of the water pump.

[0100] Optionally, the second temperature has a value interval of [0°C, -2°C].

[0101] Specifically, the second temperature may be 0°C or -1°C.

[0102] The air conditioner determines whether the conditions for continuous water pump operation are met based on the temperature of the heat exchange medium entering the second heat exchange pipe section and the dew point temperature. If the conditions are met, the water pump continues to operate, causing the heat exchange medium to heat up after flowing through the first heat exchange pipe section and heat the outdoor heat exchanger when flowing through the second heat exchange pipe section, achieving frost-free operation of the air conditioner.

[0103] FIG6 is another method for controlling an air conditioner provided by an embodiment of the present disclosure, the method comprising:

[0104] Step S601: Under heating operation, outdoor environmental parameters are detected.

[0105] Step S602: Control the operation of the water pump according to the outdoor environmental parameters, so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0106] Step S603: When the water pump is running, if the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger, the compressor frequency is obtained.

[0107] Step S604: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0108] Here, the process of recovering excess heat from the heat exchange between the heat exchange medium in the circulation pipeline and the first refrigerant section and then returning it to the second heat exchange section to defrost the outdoor heat exchanger is irreversible, resulting in system energy loss. This reduces the total system heat output over extended periods of operation. Increasing the compressor frequency can compensate for this energy loss. By determining whether the compressor frequency has reached its upper frequency limit, continued frequency increases when the compressor frequency is already high can be avoided, preventing system failures caused by continued frequency increases.

[0109] The running time and the decrease in outdoor ambient temperature may cause the heat exchange medium in the circulation pipeline to provide insufficient heat to the outdoor heat exchanger. This can be determined by the running time of the water pump and the changes in the outdoor ambient temperature.

[0110] For example, when the water pump runs for longer than the first set time, it is considered that the heat exchange medium in the circulation pipeline provides insufficient heat to the outdoor heat exchanger. Or,

[0111] When the outdoor ambient temperature is less than or equal to the first temperature threshold, it is considered that the heat exchange medium in the circulation pipeline provides insufficient heat to the outdoor heat exchanger.

[0112] In order to better achieve the effects of waste heat recovery and defrosting, heat can be further provided to the circulation pipeline of the air conditioner. The following introduces how to provide a heat source for the circulation pipeline through different air conditioners.

[0113] Figure 7a shows a schematic diagram of another air conditioner system provided by an embodiment of the present disclosure, wherein heat supplementation of the system is achieved by connecting to an external heat source.

[0114] As shown in FIG. 7 a , the air conditioner provided by the embodiment of the present disclosure includes a refrigeration system, a hot water storage tank 8 , a first valve 91 and a second valve 92 .

[0115] The refrigeration system includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a throttling device 4, an outdoor heat exchanger 5, a first refrigerant pipe section 10 connecting the indoor heat exchanger 3 and the throttling device 4, a circulation pipeline 6, and a water pump 7. The circulation pipeline 6 contains a flowable heat exchange medium. The circulation pipeline 6 includes a first heat exchange pipe section 11 and a second heat exchange pipe section 12. The first heat exchange pipe section 11 can exchange heat with the first refrigerant pipe section 10. The second heat exchange pipe section 12 can exchange heat with the outdoor heat exchanger 5. The water pump 7 is disposed in the circulation pipeline 6. When the water pump 7 is in operation, it drives the heat exchange medium to circulate within the circulation pipeline 6.

[0116] The heat storage tank 8 includes a first water pipe 81 and a second water pipe 82. The first water pipe 81 is connected to one end of the first heat exchange pipe section 11, and the second water pipe 82 is connected to the other end of the first heat exchange pipe section.

[0117] The first valve 91 is provided at one end of the first heat exchange pipe section 11. When the first valve 91 is open, the heat exchange medium in the circulation pipe 6 completes heat exchange in the first heat exchange pipe section 11 and then flows through the second heat exchange pipe section 12 to heat the outdoor heat exchanger 5.

[0118] The second valve 92 is provided on the first water pipe 81 . When the second valve 92 is opened, the heat exchange medium in the hot water storage tank 8 enters the circulation pipeline 6 through the first water pipe 81 and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section 12 .

[0119] Here, the heat of the heat exchange medium is supplemented by a hot water storage tank. The heat of the hot water storage tank can come from solar energy or an external power source. By opening the first valve 91 and the second valve 92 to enter parallel heating mode, the heat exchange medium in the hot water storage tank 8 can supplement the heat required for heat exchange and defrosting of the heat exchange medium in the circulation pipeline 6, ensuring stable and frost-free operation of the system.

[0120] Optionally, the air conditioner further includes a third valve 93 disposed on the second water pipe 82. When the third valve 93 is open, a portion of the heat exchange medium flowing out of the second heat exchange pipe section 12 flows back to the hot water storage tank 8 through the second water pipe 82. The third valve 93 is provided to achieve reheating of the dehumidified heat exchange medium after it flows into the hot water storage tank.

[0121] FIG7 b shows a schematic diagram of a method for controlling an air conditioner provided by the present application, which is applied to the air conditioner shown in FIG7 a .

[0122] As shown in FIG7b , the control method for an air conditioner includes:

[0123] Step S701, in the case of heating operation, detecting outdoor environmental parameters;

[0124] Step S702: Control the operation of the water pump according to the outdoor environmental parameters, so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0125] Step S703: When the water pump is running, if the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger, the compressor frequency is obtained.

[0126] Step S704: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0127] Step S705: When the compressor frequency is greater than or equal to the upper frequency limit, the temperature of the heat exchange medium in the hot water storage tank is detected.

[0128] Step S706: Determine the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the hot water storage tank.

[0129] Here, if the heat exchange medium in the circulation pipeline is insufficient to provide heat to the outdoor heat exchanger and the compressor frequency reaches the upper frequency limit, the heat exchange medium in the water storage tank is used to supplement the heat exchange medium. The heat of the water storage tank can come from solar energy or an external power source.

[0130] Furthermore, the heat source for heating the outdoor heat exchanger is determined according to the temperature of the heat exchange medium in the hot water storage tank, including:

[0131] When Tx>T2, the second valve and the third valve are opened, and the first valve is closed, so that the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe, and the heat exchange medium in the hot water storage tank is used as a heat source to heat the outdoor heat exchanger;

[0132] When T3 < Tx ≤ T2, the first valve, the second valve and the third valve are opened, and the heat exchange medium in the hot water storage tank is used as a partial heat source for heating the outdoor heat exchanger;

[0133] Wherein, Tx represents the temperature of the heat exchange medium in the hot water storage tank, T2 represents the maximum temperature at which the heat exchange medium in the hot water storage tank can reach the defrost condition, and T3 represents the minimum temperature at which the heat exchange medium in the hot water storage tank can reach the defrost condition.

[0134] Here, the heat exchange medium in the hot water storage tank reaches the defrosting condition, which means that the temperature range of the heat exchange medium in the hot water storage tank can achieve the purpose of defrosting.

[0135] Therefore, when Tx>T2, the temperature of the heat exchange medium in the hot water storage tank is greater than the maximum temperature at which it can reach the defrosting condition, and a defrosting effect with better defrosting intensity can be achieved. Therefore, the first valve will be closed, and the second valve and the third valve will be opened. The heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe and flows back to the hot water storage tank through the second water pipe. The heat exchange medium in the hot water storage tank serves as a heat source for heating the outdoor heat exchanger.

[0136] When T3<Tx≤T2, the temperature of the heat exchange medium in the hot water storage tank can achieve the purpose of defrosting and has a certain heat exchange capacity. Therefore, it serves as a partial heat source for heating the outdoor heat exchanger and heats the outdoor heat exchanger together with other heat sources.

[0137] Figure 8a shows a schematic diagram of another air conditioner system provided by the present application. By connecting the indoor fan coil, a bypass is provided as a connecting pipe section 150, which is connected in parallel with the circulation pipe 6 to supplement the heat loss of the heat exchange medium.

[0138] As shown in FIG. 8 a , the air conditioner provided by the embodiment of the present disclosure includes a refrigeration system, a fan coil unit 100 and a fourth valve 94 .

[0139] The refrigeration system includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a throttling device 4, an outdoor heat exchanger 5, a first refrigerant pipe section 10 connecting the indoor heat exchanger 3 and the throttling device 4, a circulation pipeline 6, and a water pump 7. A flowable heat exchange medium is contained within the circulation pipeline 6. The circulation pipeline 6 includes a first heat exchange pipe section 11 and a second heat exchange pipe section 12. The first heat exchange pipe section 11 can exchange heat with the first refrigerant pipe section 10. The second heat exchange pipe section 12 can exchange heat with the outdoor heat exchanger 5. The water pump 7 is disposed in the circulation pipeline 6. When the water pump 7 is in operation, it drives the heat exchange medium to circulate within the circulation pipeline 6.

[0140] The fan coil unit 100 includes a third water pipe 110, a fourth water pipe 120, and a connecting pipe section 150 connecting the expansion tank 130 and the coil 140. One end of the third water pipe 110 is connected to the upstream end of the connecting pipe section 150 where the heat exchange medium flows, and the other end is connected to one end of the first heat exchange pipe section 11; one end of the fourth water pipe 120 is connected to the downstream end of the connecting pipe section 150 where the heat exchange medium flows, and the other end is connected to the other end of the first heat exchange pipe section 11.

[0141] Here, the upstream end and the downstream end of the heat exchange medium flow refer to the access point of the third water pipe 110 on the connecting pipe section 150 and the access point of the fourth water pipe 120 on the connecting pipe section 150, which are arranged along the flow direction of the heat exchange medium in the connecting pipe section 150.

[0142] The fourth valve 94 is provided on the third water pipe 110. When the fourth valve 94 is opened, the heat exchange medium in the fan coil unit enters the circulation pipeline 6 through the third water pipe 110 and heats the outdoor heat exchanger 5 when flowing through the second heat exchange pipe section 12.

[0143] Here, the fan coil unit 100 replenishes the heat of the heat exchange medium. A bypass from the indoor fan coil 140 serves as a connecting pipe section 150, connected in parallel with the circulation line 6 to compensate for the heat loss of the heat exchange medium. By opening the fourth valve 94, parallel heating mode is activated, connecting the heat exchange medium (indoor unit return water) in the connecting pipe section 150 to the circulation line 6 via the third water pipe 110. The heat exchange medium in the third water pipe 110 replenishes the heat required for heat exchange and defrosting within the circulation line 6, ensuring stable, frost-free operation of the system.

[0144] Optionally, the air conditioner further includes a fifth valve 95 disposed on the fourth water pipe 120. When the fifth valve 95 is open, a portion of the heat exchange medium flowing out of the second heat exchange pipe section 12 flows back to the fan coil unit 100 through the fourth water pipe 120. The fifth valve 95 is provided to achieve the return of the heat exchange medium and maintain gas-liquid balance within the system.

[0145] Optionally, the air conditioner further includes multiple heat exchange terminals 160 connected in parallel with the indoor fan coil units 140. A fifth water pipe 170 is connected in parallel to the pipes containing the heat exchange terminals. The water inlet ends of the heat exchange terminals and the water inlet ends of the fifth water pipe 170 are connected to the water outlet ends of the indoor fan coil units 140 via a sixth valve 96.

[0146] FIG8 b shows a schematic diagram of a method for controlling an air conditioner provided in the present application, which is applied to the air conditioner shown in FIG8 a .

[0147] As shown in FIG8b , the control method for an air conditioner includes:

[0148] Step S801, in the case of heating operation, detecting outdoor environmental parameters;

[0149] Step S802: Control the operation of the water pump according to the outdoor environmental parameters, so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

[0150] Step S803: When the water pump is running, if the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger, the compressor frequency is obtained.

[0151] Step S804: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0152] Step S805, when the compressor frequency is greater than or equal to the upper limit value of the frequency, detect the temperature of the heat exchange medium in the coil.

[0153] Step S806, determine the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil.

[0154] Here, when the heat provided by the heat exchange medium in the circulation pipeline to the outdoor heat exchanger is insufficient and the compressor frequency reaches the upper limit value of the frequency, the heat of the heat exchange medium in the coil in the fan coil unit is used to supplement the heat of the heat exchange medium.

[0155] Further, determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil includes:

[0156] When Ty≥T4, open the fourth valve and the fifth valve, close the first valve, and make the heat exchange medium in the coil enter the circulation pipeline through the third water pipe, and use the heat exchange medium in the coil as the heat source for heating the outdoor heat exchanger;

[0157] When T5≤Ty<T4, open the first valve, the fourth valve and the fifth valve, and use the heat exchange medium in the circulation pipeline and the heat exchange medium in the coil as part or all of the heat source for heating the outdoor heat exchanger;

[0158] Among them, Ty represents the detected temperature of the heat exchange medium in the coil, T4 represents the highest temperature that the heat exchange medium in the coil can reach the defrosting condition, and T5 represents the lowest temperature that the heat exchange medium in the coil can reach the defrosting condition.

[0159] Here, that the heat exchange medium in the coil can reach the defrosting condition means that the temperature range where the heat exchange medium in the coil is located can achieve the defrosting purpose.

[0160] Therefore, when Ty≥T4, the temperature of the heat exchange medium in the coil is greater than the highest temperature that it can reach the defrosting condition, and a better defrosting effect with stronger defrosting intensity can be achieved. Therefore, the first valve will be closed, the fourth valve and the fifth valve will be opened, the heat exchange medium in the coil will enter the circulation pipeline through the third water pipe, flow back to the coil through the fourth water pipe, and the heat exchange medium in the coil is used as the heat source for heating the outdoor heat exchanger.

[0161] When T5≤Ty<T4, the temperature of the heat exchange medium in the coil can achieve the defrosting purpose and has a certain heat exchange capacity. Therefore, it is used as part of the heat source for heating the outdoor heat exchanger and jointly realizes the heating of the outdoor heat exchanger with other heat sources.

[0162] Figure 9a shows a schematic diagram of another air conditioner system provided by the present application. By adding an external heat source and connecting an indoor fan coil unit, a multi-heat source system operation mode is formed.

[0163] 9 a , the air conditioner provided by the embodiment of the present disclosure includes a refrigeration system, a cooling system, a hot water storage tank 8 , a fan coil unit 100 , a first valve 91 , a second valve 92 and a fourth valve 94 .

[0164] The refrigeration system includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a throttling device 4, an outdoor heat exchanger 5, a first refrigerant pipe section 10 connecting the indoor heat exchanger 3 and the throttling device 4, a circulation pipeline 6, and a water pump 7. The circulation pipeline 6 contains a flowable heat exchange medium. The circulation pipeline 6 includes a first heat exchange pipe section 11 and a second heat exchange pipe section 12. The first heat exchange pipe section 11 can exchange heat with the first refrigerant pipe section 10. The second heat exchange pipe section 12 can exchange heat with the outdoor heat exchanger 5. The water pump 7 is disposed in the circulation pipeline 6. When the water pump 7 is in operation, it drives the heat exchange medium to circulate within the circulation pipeline 6.

[0165] The heat storage tank 8 includes a first water pipe 81 and a second water pipe 82. The first water pipe 81 is connected to one end of the first heat exchange pipe section 11, and the second water pipe 82 is connected to the other end of the first heat exchange pipe section.

[0166] The first valve 91 is provided at one end of the first heat exchange pipe section 11. When the first valve 91 is open, the heat exchange medium in the circulation pipe 6 completes heat exchange in the first heat exchange pipe section 11 and then flows through the second heat exchange pipe section 12 to heat the outdoor heat exchanger 5.

[0167] The second valve 92 is provided on the first water pipe 81 . When the second valve 92 is opened, the heat exchange medium in the hot water storage tank 8 enters the circulation pipeline 6 through the first water pipe 81 and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section 12 .

[0168] The fan coil unit 100 includes a third water pipe 110, a fourth water pipe 120, and a connecting pipe section 150 connecting the expansion tank 130 and the coil 140. One end of the third water pipe 110 is connected to the end of the connecting pipe section 150 close to the coil 140, and the other end is connected to one end of the first heat exchange pipe section 11. One end of the fourth water pipe 120 is connected to the end of the connecting pipe section 150 away from the coil 140, and the other end is connected to the other end of the first heat exchange pipe section 11.

[0169] The fourth valve 94 is provided on the third water pipe 110. When the fourth valve 94 is opened, the heat exchange medium in the fan coil unit enters the circulation pipeline 6 through the third water pipe 110 and heats the outdoor heat exchanger 5 when flowing through the second heat exchange pipe section 12.

[0170] Optionally, the air conditioner further includes a third valve 93 disposed on the second water pipe 82. When the third valve 93 is open, a portion of the heat exchange medium flowing out of the second heat exchange pipe section 12 flows back to the hot water storage tank 8 through the second water pipe 82. The third valve 93 is provided to achieve reheating of the dehumidified heat exchange medium after it flows into the hot water storage tank.

[0171] Optionally, the air conditioner further includes a fifth valve 95 disposed on the fourth water pipe 120. When the fifth valve 95 is open, a portion of the heat exchange medium flowing out of the second heat exchange pipe section 12 flows back to the fan coil unit 100 through the fourth water pipe 120. The fifth valve 95 is provided to achieve the return of the heat exchange medium and maintain gas-liquid balance within the system.

[0172] Optionally, the air conditioner further includes multiple heat exchange terminals 160 connected in parallel with the indoor fan coil units 140. A fifth water pipe 170 is connected in parallel to the pipes containing the heat exchange terminals. The water inlet ends of the heat exchange terminals and the water inlet ends of the fifth water pipe 170 are connected to the water outlet ends of the indoor fan coil units 140 via a sixth valve 96.

[0173] FIG9 b shows a schematic diagram of a method for controlling an air conditioner provided in the present application, which is applied to the air conditioner shown in FIG9 a .

[0174] As shown in FIG9b , the control method for an air conditioner includes:

[0175] Step S901, in the case of heating operation, detecting outdoor environmental parameters;

[0176] In step S902, the water pump is controlled based on outdoor environmental parameters, causing the heat exchange medium to heat up after flowing through the first heat exchange pipe segment and then heat the outdoor heat exchanger as it flows through the second heat exchange pipe segment. At this point, the heat exchange medium in the circulating pipe serves as the entire heat source for heating the outdoor heat exchanger. The first valve is open, and the second, third, fourth, and fifth valves are closed.

[0177] Step S903: When the water pump is running, if the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger, the compressor frequency is obtained.

[0178] Step S904: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0179] Step S905: When the compressor frequency is greater than or equal to the upper frequency limit, the temperature Tx of the heat exchange medium in the hot water storage tank is detected.

[0180] Step S906, when Tx > T2, use the heat exchange medium in the hot water storage tank as the entire heat source for heating the outdoor heat exchanger. Close the first valve, the fourth valve, and the fifth valve, and open the second valve and the third valve.

[0181] Step S907, when Tx ≤ T2, obtain the temperature Ty of the heat exchange medium in the coil. At this time, use the heat exchange medium in the hot water storage tank as a partial heat source for heating the outdoor heat exchanger.

[0182] Step S908, when T3 < Tx ≤ T2 and Ty ≥ T4, use the heat exchange medium in the hot water storage tank and the heat exchange medium in the coil together as the heat source for heating the outdoor heat exchanger. At this time, the first valve is closed, and the second valve, the third valve, the fourth valve, and the fifth valve are open.

[0183] Step S909, when T3 < Tx ≤ T2 and T5 ≤ Ty < T4, use the heat exchange medium in the circulation pipeline, the heat exchange medium in the hot water storage tank, and the heat exchange medium in the coil together as the heat source for heating the outdoor heat exchanger. At this time, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve are all open.

[0184] Step S910, when T3 < Tx ≤ T2 and Ty < T5, use the heat exchange medium in the circulation pipeline and the heat exchange medium in the hot water storage tank together as the heat source for heating the outdoor heat exchanger. At this time, the first valve, the second valve, and the third valve are open, and the fourth valve and the fifth valve are closed.

[0185] Step S911, when Tx < T3 and Ty ≥ T4, use the heat exchange medium in the coil as the entire heat source for heating the outdoor heat exchanger. The first valve, the second valve, and the third valve are closed, and the fourth valve and the fifth valve are open.

[0186] Step S912, when Tx < T3 and T5 ≤ Ty < T4, use the heat exchange medium in the circulation pipeline and the heat exchange medium in the coil together as the heat source for heating the outdoor heat exchanger. The first valve, the fourth valve, and the fifth valve are open, and the second valve and the third valve are closed.

[0187] Optionally, when Tx < T3 and Ty < T5, push information to the user to prompt possible frosting.

[0188] Among them, 45°C < T2 < 70°C, 10°C > T3 > (T2 - 10)°C; 45°C < T4 < 60°C, 10°C > T5 > (T4 - 5°C).

[0189] As shown in Figure 10, an embodiment of the present disclosure provides a device 1000 for controlling an air conditioner, including a processor 1010 and a memory 1011. Optionally, the device may further include a communication interface 1012 and a bus 1013. The processor 1010, the communication interface 1012, and the memory 1011 can communicate with each other through the bus 1013. The communication interface 1012 can be used for information transmission. The processor 1010 can call the logic instructions in the memory 1011 to execute the method for controlling the air conditioner of the above embodiment.

[0190] In addition, the logic instructions in the memory 1011 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0191] Memory 1011, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 1010 executes the program instructions / modules stored in memory 1011 to execute functional applications and process data, thereby implementing the method for controlling an air conditioner in the above-described embodiments.

[0192] The memory 1011 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 1011 may include high-speed random access memory and non-volatile memory.

[0193] As shown in FIG11 , an embodiment of the present disclosure provides an air conditioner 1100, comprising an air conditioner body, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, a first refrigerant pipe segment connecting the indoor heat exchanger and the throttling device, a circulation pipeline, a water pump, and the aforementioned device 1000 for controlling the air conditioner. The circulation pipeline contains a flowable heat exchange medium. The circulation pipeline includes a first heat exchange segment for exchanging heat with the first refrigerant pipe segment and a second heat exchange segment for exchanging heat with the outdoor heat exchanger. The water pump is disposed within the circulation pipeline and, when in operation, drives the heat exchange medium to circulate within the circulation pipeline. When the air conditioner is in heating mode, the heat exchange medium heats up after flowing through the first heat exchange segment and heats the outdoor heat exchanger as it flows through the second heat exchange segment. The device 1000 for controlling the air conditioner is mounted within the air conditioner body. The installation relationship described herein is not limited to placement within the product but also includes connections with other components of the product, including but not limited to physical, electrical, and signal transmission connections. Those skilled in the art will appreciate that the device 1000 for controlling an air conditioner can be adapted to a feasible product body to implement other feasible embodiments.

[0194] Optionally, the heat exchange medium is an antifreeze liquid in the air conditioner. The existing medium in the air conditioner is used to defrost the air conditioner, or to enable the air conditioner to achieve frost-free operation, thereby saving production costs.

[0195] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0196] An embodiment of the present disclosure provides a computer program, which, when executed by a computer, enables the computer to implement the above-mentioned method for controlling an air conditioner.

[0197] An embodiment of the present disclosure provides a computer program product, which includes computer instructions stored on a computer-readable storage medium. When the program instructions are executed by a computer, the computer is enabled to implement the above-mentioned method for controlling an air conditioner.

[0198] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0199] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0200] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to 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. In the absence of more limitations, the elements defined by the sentence "comprises a..." do not preclude the presence or addition of the elements defined by the sentence "comprises a..."

[0201] The processes, methods, or devices of the present invention may also contain other identical elements. In this document, each embodiment may focus on the differences from other embodiments, and similar parts between the embodiments can be referenced. For methods, products, etc. disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referenced in the description of the method section.

[0202] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0203] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0204] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An air conditioner, comprising an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a first refrigerant pipe section connecting the indoor heat exchanger and the throttling device, characterized in that: Also includes: A circulation pipeline, wherein a flowable heat exchange medium is present, the circulation pipeline comprising: a first heat exchange pipe section for exchanging heat with the first refrigerant pipe section, and a second heat exchange pipe section for exchanging heat with the outdoor heat exchanger; A water pump is arranged in the circulation pipeline, and when the water pump is in operation, it drives the heat exchange medium to circulate in the circulation pipeline; When the air conditioner is in heating operation, the heat exchange medium is heated up after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

2. The air conditioner according to claim 1, characterized in that: Also includes: The hot water storage tank comprises a first water pipe and a second water pipe, wherein the first water pipe is connected to one end of the first heat exchange pipe section, and the second water pipe is connected to the other end of the first heat exchange pipe section; The first valve is arranged at one end of the first heat exchange pipe section. When the first valve is opened, the heat exchange medium in the circulation pipeline flows through the second heat exchange pipe section to heat the outdoor heat exchanger after completing the heat exchange in the first heat exchange pipe section. The second valve is arranged on the first water pipe. When the second valve is opened, the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

3. The air conditioner according to claim 2, characterized in that: Also includes: The third valve is arranged on the second water pipe. When the third valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the hot water storage tank through the second water pipe.

4. The air conditioner according to any one of claims 1 to 3, characterized in that: Also includes: The fan coil unit comprises: a third water pipe, a fourth water pipe, and a connecting pipe section connecting the expansion water tank and the coil, one end of the third water pipe is connected to the connecting pipe section, and the other end is connected to one end of the first heat exchange pipe section; one end of the fourth water pipe is connected to the connecting pipe section, and the other end is connected to the other end of the first heat exchange pipe section; The fourth valve is arranged on the third water pipe. When the fourth valve is opened, the heat exchange medium in the fan coil unit enters the circulation pipeline through the third water pipe and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

5. The air conditioner according to claim 4, characterized in that: Also includes: The fifth valve is arranged on the fourth water pipe. When the fifth valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the fan coil unit through the fourth water pipe.

6. A method for controlling an air conditioner, the air conditioner comprising an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a first refrigerant pipe section connecting the indoor heat exchanger and the throttling device, characterized in that: The air conditioner further comprises: a circulation pipeline having a flowable heat exchange medium therein, the circulation pipeline comprising: a first heat exchange pipe section for heat exchange with the first refrigerant pipe section, and a second heat exchange pipe section for heat exchange with the outdoor heat exchanger; a water pump disposed in the circulation pipeline, the water pump driving the heat exchange medium to circulate in the circulation pipeline when in operation; the method comprising: In the case of heating operation, detect outdoor environmental parameters; According to the outdoor environmental parameters, the operation of the water pump is controlled so that the heat exchange medium is heated after flowing through the first heat exchange pipe section and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section.

7. The method according to claim 6, characterized in that The outdoor environmental parameter includes the outdoor environmental temperature, and the step of controlling the operation of the water pump according to the outdoor environmental parameter includes: Detecting the temperature of the heat exchange medium when it enters the second heat exchange pipe section; When Tw≥Tao, the water pump is controlled according to the evaporation temperature of the outdoor heat exchanger; Wherein, Tw represents the temperature of the heat exchange medium when it enters the second heat exchange pipe section, and Tao represents the outdoor ambient temperature.

8. The method according to claim 7, characterized in that The method of controlling the operation of the water pump according to the evaporation temperature of the outdoor heat exchanger comprises: When Ts≤To, run the water pump; or, When Ts>To, the water pump stops running; Wherein, Ts represents the evaporation temperature of the outdoor heat exchanger, and To represents the first temperature.

9. The method according to claim 7, characterized in that: The outdoor environmental parameters also include the relative humidity of the outdoor environment. The step of controlling the operation of the water pump according to the outdoor environmental parameters also includes: When Tw<Tao, the dew point temperature is calculated based on Tao and RH; When Tw>Td, the water pump is controlled to run continuously; Wherein, RH represents the relative humidity of the outdoor environment, and Td represents the dew point temperature.

10. The method according to any one of claims 6 to 9, characterized in that: Also includes: When the water pump is running, if the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger, the compressor frequency is obtained; When the compressor frequency is lower than the upper frequency limit, the compressor frequency is increased.

11. The method according to claim 10, characterized in that The air conditioner further comprises: a hot water storage tank, comprising a first water pipe and a second water pipe, the first water pipe being connected to one end of the first heat exchange pipe section, and the second water pipe being connected to the other end of the first heat exchange pipe section; a first valve being arranged at one end of the first heat exchange pipe section, and when the first valve is opened, the heat exchange medium in the circulation pipeline flows through the second heat exchange pipe section to heat the outdoor heat exchanger after completing the heat exchange in the first heat exchange pipe section; a second valve being arranged at the first water pipe, and when the second valve is opened, the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe, and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section; the method further comprises: When the compressor frequency is greater than or equal to the frequency upper limit value, the temperature of the heat exchange medium in the hot water storage tank is detected; The heat source for heating the outdoor heat exchanger is determined according to the temperature of the heat exchange medium in the hot water storage tank.

12. The method according to claim 11, characterized in that The air conditioner further comprises: a third valve, which is arranged on the second water pipe, and when the third valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the hot water storage tank through the second water pipe; The method of determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the hot water storage tank comprises: When Tx>T2, the second valve and the third valve are opened, and the first valve is closed, so that the heat exchange medium in the hot water storage tank enters the circulation pipeline through the first water pipe, and the heat exchange medium in the hot water storage tank is used as a heat source for heating the outdoor heat exchanger; In the case of T3<Tx≤T2, the heat exchange medium in the hot water storage tank is used as a partial heat source for heating the outdoor heat exchanger; Wherein, Tx represents the temperature of the heat exchange medium in the hot water storage tank, T2 represents the maximum temperature at which the heat exchange medium in the hot water storage tank can reach the defrosting condition, and T3 represents the minimum temperature at which the heat exchange medium in the hot water storage tank can reach the defrosting condition.

13. The method according to claim 11, characterized in that The air conditioner further comprises: a fan coil unit, comprising: a third water pipe, a fourth water pipe, and a connecting pipe section connecting the expansion water tank and the coil, wherein one end of the third water pipe is connected to one end of the connecting pipe section close to the coil, and the other end is connected to one end of the first heat exchange pipe section; one end of the fourth water pipe is connected to one end of the connecting pipe section far from the coil, and the other end is connected to the other end of the first heat exchange pipe section; a fourth valve is arranged on the third water pipe, and when the fourth valve is opened, the heat exchange medium in the coil enters the circulation pipeline through the third water pipe, and heats the outdoor heat exchanger when flowing through the second heat exchange pipe section; The method further comprises: When the compressor frequency is greater than or equal to the upper frequency limit, the temperature of the heat exchange medium in the coil is detected; The heat source for heating the outdoor heat exchanger is determined based on the temperature of the heat exchange medium in the coil.

14. The method according to claim 13, characterized in that The air conditioner further comprises: a fifth valve, which is arranged on the fourth water pipe, and when the fifth valve is opened, part of the heat exchange medium flowing out of the second heat exchange pipe section flows back to the coil through the fourth water pipe; The step of determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil comprises: When Ty≥T4, the fourth valve and the fifth valve are opened, and the first valve is closed, so that the heat exchange medium in the coil enters the circulation pipeline through the third water pipe, and the heat exchange medium in the coil is used as a heat source for heating the outdoor heat exchanger; When T5≤Ty<T4, the heat exchange medium in the coil is used as a partial heat source for heating the outdoor heat exchanger; Wherein, Ty represents the detected temperature of the heat exchange medium in the coil, T4 represents the maximum temperature at which the heat exchange medium in the coil can reach the defrosting condition, and T5 represents the minimum temperature at which the heat exchange medium in the coil can reach the defrosting condition.

15. A device for controlling an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling an air conditioner according to any one of claims 6 to 14 when running the program instructions.

16. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 6 to 14 is executed.

17. A computer program, which, when executed by a computer, enables the computer to implement the method for controlling an air conditioner according to any one of claims 6 to 14.

18. A computer program product, comprising computer instructions stored on a computer-readable storage medium, wherein when the program instructions are executed by a computer, the computer is enabled to implement the method for controlling an air conditioner as claimed in any one of claims 6 to 14.

Images