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

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses an air conditioner. The air conditioner comprises an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a first refrigerant pipe section communicated with the indoor heat exchanger and the throttling device, the air conditioner further comprises a circulation pipeline, a heat exchange medium capable of flowing is arranged in the circulation pipeline, and the circulation pipeline comprises 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 second refrigerant pipe section. The second heat exchange pipe section exchanges heat with the outdoor heat exchanger; the water pump is arranged on the circulating pipeline, and the water pump drives the heat exchange medium to circularly flow in the circulating pipeline under the operation condition; and under the condition of heating operation of the air conditioner, 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. In the heating operation process of the air conditioner, the circulating pipeline exchanges heat with the 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 frosting possibility of the air conditioner can be reduced.

Description

Technical Field

[0001] 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

[0002] At present, air conditioners have been popularized in most parts of my country. Especially in the south where unified heating is not implemented, people mainly rely on air conditioners to keep warm in winter. However, since the outdoor heat exchanger temperature is low when the air conditioner is heating, condensation will occur on the surface of the outdoor heat exchanger when the temperature is lower than the dew point. If the heating system is running for a long time, the condensation on the surface of the outdoor heat exchanger will frost, thus affecting the heat exchange efficiency of the air conditioner.

[0003] In order to solve the problem of frosting in the air conditioner during heating, the related technology sets a compressor waste heat recovery channel in the air conditioner, and a compressor waste heat recovery fan and a horizontal heat pipe are arranged in the compressor waste heat recovery channel. The compressor waste heat recovery fan is used to make the air in the compressor waste heat recovery channel flow through the compressor casing, and then the heated air flows through the horizontal heat pipe, so that the working medium temperature in the horizontal heat pipe is increased, and then the air entering the outdoor heat exchanger is heated. The temperature of the outdoor heat exchanger is increased to achieve the purpose of defrosting the air conditioner or achieving frost-free operation of the air conditioner.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The related art is to use the heat generated by the compressor in the air conditioner to defrost the outdoor heat exchanger. However, the heat generated by the compressor is not sufficient in many cases to achieve the purpose of defrosting the air conditioner, resulting in poor defrosting effect of the air conditioner.

[0006] 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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] 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 components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] Embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner, and a storage medium, which can improve the defrosting effect of the air conditioner.

[0009] 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.

[0010] The air conditioner is equipped with a circulation pipeline that can exchange heat with the refrigerant. The circulation pipeline exchanges heat with the high-temperature refrigerant indoors to collect heat, and exchanges heat with the outdoor heat exchanger outdoors to increase the temperature of the outdoor heat exchanger. During the heating operation of the air conditioner, the heat generated by the refrigerant indoors is higher than the heat generated by the compressor, and the defrosting effect on the outdoor heat exchanger will also be better.

[0011] 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 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 completes the 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 is arranged 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.

[0012] Optionally, 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.

[0013] 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 arranged 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.

[0014] Optionally, the air conditioner further comprises: a fifth valve, which 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.

[0015] 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, a first refrigerant pipe section connecting the indoor heat exchanger and the throttling device; a circulation pipeline having 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, arranged in the circulation pipeline, and driving the heat exchange medium to circulate in the circulation pipeline when the water pump is in operation; 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.

[0016] Optionally, the outdoor environmental parameters include outdoor environmental 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 environmental temperature.

[0017] Optionally, controlling the operation of the water pump according to the evaporation temperature of the outdoor heat exchanger includes:

[0018] 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.

[0019] Optionally, the outdoor environmental parameters also include 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.

[0020] Optionally, the method for controlling the air conditioner also 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 upper frequency limit, increasing the compressor frequency.

[0021] 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 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 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; the second valve is arranged 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; the method also includes: when the compressor frequency is greater than or equal to the upper frequency 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.

[0022] Optionally, 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 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 the heat exchange medium in the hot water storage tank is used as the heat source for heating the outdoor heat exchanger; when T3<Tx≤T2, the heat exchange medium in the hot water storage tank is used 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 highest temperature at which the heat exchange medium in the hot water storage tank can reach the defrosting condition, and T3 represents the lowest temperature at which the heat exchange medium in the hot water storage tank can reach the defrosting condition.

[0023] Optionally, 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, 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 far from the coil, and the other end is connected to the other end of the first heat exchange pipe section;

[0024] The fourth valve is arranged 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 also includes: when the compressor frequency is greater than or equal to the upper frequency limit, detecting the temperature of the heat exchange medium in the coil; and determining the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil.

[0025] The air conditioner further includes: a fifth valve, which is provided 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 into the coil through the fourth water pipe; 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 and closing the first valve, so that the heat exchange medium in the coil enters 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 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.

[0026] 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.

[0027] In some embodiments, a storage medium is provided, storing program instructions. The program instructions execute the above method for controlling an air conditioner when running. Description of the Drawings

[0028] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not limit 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:

[0029] Figure 1 is a schematic diagram of a system of an air conditioner provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0031] Figure 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0033] Figure 5 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0034] Figure 6 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0035] Figure 7a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0036] Figure 7b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0037] Figure 8a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0038] Figure 8b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0039] Figure 9a is a system schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0040] Figure 9b is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0041] Fig.10 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0042] Fig.11 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to be able to understand the features and technical contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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.

[0044] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0045] 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 have 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.

[0046] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0047] Unless otherwise stated, the term "plurality" means two or more.

[0048] 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 indicates: A or B.

[0049] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0051] Combination Figure 1 As shown, 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 running, it drives the heat exchange medium to circulate in the circulation pipeline 6.

[0052] 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 the 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 enters the outdoor heat exchanger 5 through the push of the water pump 7, and heats the outdoor heat exchanger 5 through the second heat exchange pipe section 12. After the heat exchange medium transfers the heat to the outdoor heat exchanger 5, the temperature drops and returns to the first heat exchange pipe section 11, and exchanges heat with the high-temperature liquid refrigerant in the first refrigerant pipe section 10 again. This reciprocating circulation flows.

[0053] Optionally, the heat exchange medium in the first heat exchange pipe section 11 and the refrigerant in the first refrigerant pipe section 10 are heat exchanged through a shell-and-tube heat exchanger. The shell-and-tube heat exchanger includes an outer tube and an inner tube, and the outer tube is sleeved outside the inner tube. In the embodiment disclosed herein, the first refrigerant pipe section 10 is used as the inner tube, and the first heat exchange pipe section 11 is used as the outer tube, so that the heat exchange medium and the refrigerant complete the heat exchange in the shell-and-tube heat exchanger through the inner tube and the outer tube.

[0054] Optionally, the heat exchange medium in the first heat exchange pipe section 11 and the refrigerant in the first refrigerant pipe section 10 are heat exchanged through a plate heat exchanger. A channel for heat exchange between the heat exchange medium and the refrigerant is formed in the plate heat exchanger, the first heat exchange pipe section 11 serves as one channel in the plate heat exchanger, and the first refrigerant pipe section 10 serves as another channel in the plate heat exchanger. The heat exchange medium and the refrigerant complete heat exchange in the channel formed by the heat exchange plates in the plate heat exchanger.

[0055] In the above-mentioned air conditioner provided by the embodiment of the present disclosure, the water pump 7 does not operate 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 operates, 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 condensed high-temperature and high-pressure supercooled liquid refrigerant 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. After the refrigerant flowing out of the first refrigerant pipe section 10 enters the throttling device 4 for throttling and pressure reduction, it 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, and 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 driven 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, thus forming a heat exchange medium circulation.

[0056] Optionally, the heat exchange medium includes antifreeze. In the embodiment of the present disclosure, the heat exchange medium includes ethylene glycol, such as an ethylene glycol aqueous solution. The freezing point of the ethylene glycol aqueous solution is low and it is not easy to freeze.

[0057] Optionally, the water pump 7 is configured to controllably adjust the flow rate of the heat exchange medium. By adjusting 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 adjusted, thereby achieving a controllable increase in the temperature of the fins of the outdoor heat exchanger 5 and realizing the corresponding frost suppression function.

[0058] In the air conditioner provided by the embodiment of the present disclosure, the heat exchange medium in the circulation pipeline 6, which absorbs heat and increases its temperature at the first heat exchange pipe section 11, can heat up the fins of the outdoor heat exchanger 5 in the second heat exchange pipe section 12 by heat exchange, thereby reducing the possibility of frost on the fins of the outdoor heat exchanger. Since the condensation waste heat generated by the refrigerant is more sufficient than the waste heat generated by the compressor during the heating process of the air conditioner, the purpose of defrosting the outdoor heat exchanger can be better achieved by utilizing the condensation waste heat, thereby improving the defrosting effect of the air conditioner.

[0059] Combination Figure 1 The air conditioner shown in the figure, the embodiment of the present disclosure provides a method for controlling the air conditioner. Figure 2 As shown, the method includes:

[0060] Step S201 : the air conditioner detects outdoor environmental parameters when operating in heating mode.

[0061] Heating operation refers to the operation mode of the air conditioner with the indoor heat exchanger as the condenser and the outdoor heat exchanger as the evaporator. It can include the heating function of the air conditioner, the heating stage of the self-cleaning function, and the heating stage of other functional modes.

[0062] 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.

[0063] When the air conditioner is in heating operation, the operation of the water pump is controlled by detecting outdoor environmental parameters, so that the heat exchange medium heated by heat exchange in the first heat exchange pipe section is pushed into the outdoor heat exchanger by the water pump and heats the outdoor heat exchanger, thereby achieving defrosting of the air conditioner or enabling frost-free operation of the air conditioner.

[0064] Figure 3 Another method for controlling an air conditioner provided by an embodiment of the present disclosure includes:

[0065] Step S301 : the air conditioner detects outdoor environmental parameters when operating in heating mode.

[0066] The outdoor environmental parameters include the outdoor ambient temperature and the outdoor ambient relative humidity.

[0067] Step S302, the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0068] Step S303: When Tw≥Tao, the air conditioner controls the operation of the water pump according to the evaporation temperature of the outdoor heat exchanger. Tao represents the outdoor environment temperature.

[0069] If Tw≥Tao, that is, the temperature of the heat exchange medium when entering the second heat exchange pipe section is greater than the outdoor ambient temperature, it means that the heat exchange medium entering the second heat exchange pipe section will dissipate heat to the outdoor environment when exchanging heat with the outdoor environment, resulting in heat loss of the air conditioner. Therefore, in order to reduce the heat loss of the air conditioner to the outdoor environment, it is necessary to determine whether the air conditioner has reached the condition requiring defrosting based on the evaporation temperature of the outdoor heat exchanger. When the air conditioner needs to be defrosted, the water pump is started to circulate the heat exchange medium to defrost the outdoor heat exchanger. When the air conditioner does not need to be defrosted, the water pump is stopped to reduce the heat dissipation of the air conditioner to the outdoor environment. That is, when Tw≥Tao, the air conditioner executes the intermittent defrosting mode to achieve alternating operation of the heating mode and the defrosting mode.

[0070] Step S304: When Tw < Tao, the air conditioner controls the water pump to operate according to Tao and RH, wherein RH represents the relative humidity of the outdoor environment.

[0071] If Tw<Tao, that is, the temperature of the heat exchange medium when entering the second heat exchange pipe section is less than or equal to the outdoor ambient temperature, it means that the heat exchange medium entering the second heat exchange pipe section will not dissipate heat to the outdoor environment when exchanging heat with the outdoor environment. Therefore, the air conditioner will not lose heat due to turning on the water pump. In this case, the water pump can be controlled to run continuously according to Tao and RH, so that the air conditioner can run frost-free.

[0072] The air conditioner determines whether the conditions for water pump operation are met based on the temperature of the heat exchange medium when it enters the second heat exchange pipe section and the outdoor ambient temperature. If the conditions for water pump operation are met, the water pump is operated to increase the temperature of the heat exchange medium after flowing through the first heat exchange pipe section and heat the outdoor heat exchanger when flowing through the second heat exchange pipe section. This allows the air conditioner to be defrosted or to be operated without frost.

[0073] In the following, in conjunction with a specific embodiment, how to control the operation of the water pump when Tw≥Tao is described.

[0074] Figure 4 Another method for controlling an air conditioner provided by an embodiment of the present disclosure includes:

[0075] Step S401: the air conditioner detects the outdoor ambient temperature Tao when the air conditioner is in heating operation.

[0076] Step S402, the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0077] Step S403: When Tw≥Tao, the air conditioner obtains the evaporation temperature Ts of the outdoor heat exchanger. Otherwise, the process returns to step S401.

[0078] Step S404: When Ts≤To, the air conditioner operates the water pump, where To represents the first temperature.

[0079] The first temperature is the temperature at which the outdoor heat exchanger has frosted. If the situation of Ts≤To is established, that is, the evaporation temperature of the outdoor heat exchanger is less than or equal to the frosting temperature, it means that the air conditioner has reached the defrosting condition, and the water pump is controlled to run for defrosting. Otherwise, return to step S401 and continue to detect outdoor environmental parameters. Optionally, To≈Tao-10℃.

[0080] Specifically, when Tao=0°C, To is approximately -10°C.

[0081] Step S405: if Ts>To, the air conditioner stops the water pump.

[0082] Optionally, after controlling the water pump to start or stop running, 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.

[0083] 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 up, and when flowing through the second heat exchange pipe section, the outdoor heat exchanger is heated to defrost the outdoor heat exchanger.

[0084] After the water pump is running, if the situation of Ts>To is established, that is, the evaporation temperature of the outdoor heat exchanger is greater than the temperature at which the outdoor heat exchanger has been frosted, it means that the air conditioner has completed defrosting, and the water pump is controlled to stop running. The heat exchange medium cannot circulate in the circulation pipeline, and the air conditioner stops defrosting. After setting the time, return to step S404, and continue to control the water pump according to the numerical relationship between Ts and To, so that the water pump switches between starting and stopping, and defrosts the outdoor heat exchanger when the water pump is running, so as to realize alternating operation of heating mode and defrosting mode, and realize intermittent defrosting mode.

[0085] The disclosed embodiment determines whether the conditions for the operation of the water pump are met based on the evaporation temperature of the outdoor heat exchanger and the temperature at which the outdoor heat exchanger has been frosted. When the conditions for the operation of the water pump 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. When defrosting is completed, the water pump is stopped. By means of 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. When the air conditioner has completed defrosting, the water pump is stopped to reduce the heat loss of the air conditioner.

[0086] In the following, in conjunction with a specific embodiment, how to control the operation of the water pump when Tw is less than Tao is described.

[0087] Figure 5 Another method for controlling an air conditioner provided by an embodiment of the present disclosure includes:

[0088] Step S501: When the air conditioner is in heating operation, the outdoor environment temperature Tao and the relative humidity RH of the outdoor environment are detected.

[0089] Step S502: the air conditioner detects the temperature Tw of the heat exchange medium when it enters the second heat exchange pipe section.

[0090] Step S503: When Tw < Tao, the air conditioner calculates Td according to Tao and RH, where Td represents the dew point temperature.

[0091] The dew point temperature is calculated using the Magnus-Tetens approximation method, that is, the dew point temperature Td is calculated using the following formula: Substitute Tao into T in the formula and substitute RH into RH in the formula.

[0092]

[0093] Wherein, T is the outdoor environment temperature, RH is the outdoor environment relative humidity, a is the first constant, b is the second constant, ln is the natural logarithm; 0<a<b.

[0094] Step S504: When Tw>Td, the air conditioner controls the water pump to continue running. Otherwise, the process returns to step S501 to continue testing.

[0095] Tw>Td, that is, the temperature of the heat exchange medium when entering the second heat exchange pipe section is higher than the dew point temperature, indicating that when the heat exchange medium exchanges heat with the outdoor heat exchanger, there is a possibility that the temperature of the outdoor heat exchanger is higher than the dew point temperature. When the temperature of the outdoor heat exchanger is higher than the dew point temperature, no frost will form on the surface. Therefore, if the situation of Tw>Td is established, the water pump is controlled to continue to run and the next step is executed. Otherwise, return to step S501 and continue to detect outdoor environmental parameters.

[0096] When it is determined that the heat exchange medium may make the temperature of the outdoor heat exchanger higher than the dew point temperature, the air conditioner controls the water pump to continue to operate, 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, thereby achieving the possibility of frost-free operation of the air conditioner.

[0097] 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.

[0098] The second temperature is the temperature at which the outdoor heat exchanger begins to frost. By reducing the operating frequency of the water pump, the temperature of the heat exchange medium is reduced to a temperature higher than the temperature at which the outdoor heat exchanger begins to frost. In this way, the air conditioner can be prevented from frost formation and the power consumption of the water pump operation can be reduced.

[0099] Optionally, the temperature value interval of the second temperature is [0°C, -2°C].

[0100] Specifically, the second temperature may be 0°C or -1°C.

[0101] The air conditioner determines whether the conditions for continuous operation of the water pump are met based on the temperature of the heat exchange medium when it enters the second heat exchange pipe section and the dew point temperature. If the conditions are met, the water pump is continuously operated to increase the temperature of the heat exchange medium 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.

[0102] Figure 6 Another method for controlling an air conditioner provided by an embodiment of the present disclosure includes:

[0103] Step S601, detecting outdoor environmental parameters in the case of heating operation.

[0104] Step S602, 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.

[0105] 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.

[0106] Step S604: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0107] Here, since the process of using the waste heat after the heat exchange medium in the circulation pipeline and the first refrigerant pipe section to recover the waste heat to the second heat exchange pipe section for defrosting the outdoor heat exchanger is irreversible, the system energy is lost, and the total heat of the system is reduced when it is operated for a long time. The energy loss during this operation can be compensated by increasing the compressor frequency. By determining whether the compressor frequency has reached the upper frequency limit, it is avoided that when the compressor frequency is already at a high level, continuous frequency increase operation will cause system operation failure.

[0108] The operation time and the decrease of outdoor ambient temperature may cause the heat exchange medium in the circulation pipeline to provide insufficient heat to the outdoor heat exchanger, which can be determined by the operation time of the water pump and the change of outdoor ambient temperature.

[0109] For example, when the water pump runs for a time longer than the first set time, it is considered that the heat exchange medium in the circulation pipeline does not provide enough heat to the outdoor heat exchanger. Or,

[0110] 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.

[0111] In order to better achieve the effect of waste heat recovery and defrosting, heat can be further provided for the circulation pipeline of the air conditioner. The following introduces how to provide heat source for the circulation pipeline through different air conditioners.

[0112] Figure 7a A schematic diagram of another air conditioner system provided by an embodiment of the present disclosure is shown. The system heat is supplemented by connecting an external heat source.

[0113] Combination Figure 7a As shown, 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.

[0114] 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. 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 running, it drives the heat exchange medium to circulate in the circulation pipeline 6.

[0115] The hot water storage tank 8 includes a first water pipe 81 and a second water pipe 82, wherein 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;

[0116] The first valve 91 is disposed at one end of the first heat exchange pipe section 11. When the first valve 91 is opened, the heat exchange medium in the circulation pipeline 6 flows through the second heat exchange pipe section 12 to heat the outdoor heat exchanger 5 after completing the heat exchange in the first heat exchange pipe section 11.

[0117] The second valve 92 is disposed 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 .

[0118] Here, the heat of the heat exchange medium is supplemented by the hot water storage tank. The heat of the hot water storage tank can come from solar energy or an external power supply. By opening the first valve 91 and the second valve 92, the parallel heating mode is entered, and 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, so that the system can operate stably without frost.

[0119] Optionally, the air conditioner further comprises: a third valve 93, which is arranged on the second water pipe 82. When the third valve 93 is opened, part 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. Here, by setting the third valve 93, the reheating of the heat exchange medium after the temperature loss flows into the hot water storage tank is achieved.

[0120] Figure 7b A schematic diagram of a method for controlling an air conditioner provided by the present application is shown, which is applied to Figure 7a In the air conditioner shown.

[0121] like Figure 7b As shown, the control method for the air conditioner includes:

[0122] Step S701, in the case of heating operation, detecting outdoor environmental parameters;

[0123] Step S702, 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.

[0124] 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.

[0125] Step S704: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0126] 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.

[0127] 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.

[0128] Here, when the heat exchange medium in the circulation pipeline provides insufficient heat to the outdoor heat exchanger and the compressor frequency reaches the upper frequency limit, the heat exchange medium is supplemented by the heat exchange medium in the water storage tank. The heat of the water storage tank can come from solar energy or an external power supply.

[0129] Further, according to the temperature of the heat exchange medium in the hot water storage tank, the heat source for heating the outdoor heat exchanger is determined, including:

[0130] 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;

[0131] 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;

[0132] 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.

[0133] 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.

[0134] Therefore, when Tx>T2, the temperature of the heat exchange medium in the hot water storage tank is greater than the highest temperature at which it can reach the defrosting condition, and a defrosting effect with better defrosting intensity can be achieved. Therefore, the first valve is closed, and the second valve and the third valve are 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 is used as a heat source for heating the outdoor heat exchanger.

[0135] 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.

[0136] Figure 8aThe schematic diagram of another air conditioner system provided by the present application is shown. 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.

[0137] Combination Figure 8a As shown, 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 .

[0138] 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. 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 running, it drives the heat exchange medium to circulate in the circulation pipeline 6.

[0139] 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 water 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.

[0140] 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 arranged along the flow direction of the heat exchange medium in the connecting pipe section 150.

[0141] The fourth valve 94 is arranged 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.

[0142] Here, the heat of the heat exchange medium is supplemented by the fan coil unit 100. A bypass of the indoor fan coil 140 is used as a connecting pipe section 150, which is connected in parallel with the circulation pipeline 6 to supplement the heat loss of the heat exchange medium. By opening the fourth valve 94, the parallel heating mode is entered, and the heat exchange medium (indoor unit return water) in the connecting pipe section 150 is connected to the circulation pipeline 6 through the third water pipe 110. The heat exchange medium in the third water pipe 110 can supplement the heat required for heat exchange and defrosting of the heat exchange medium in the circulation pipeline 6, so that the system can operate stably without frost.

[0143] Optionally, the air conditioner further includes: a fifth valve 95, which is disposed on the fourth water pipe 120. When the fifth valve 95 is opened, part 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. Here, by setting the fifth valve 95, the heat exchange medium flows back to maintain the gas-liquid balance in the system.

[0144] Optionally, the air conditioner further includes a plurality of heat exchange terminals 160 connected in parallel with the indoor fan coil 140. A fifth water pipe 170 is connected in parallel to the pipeline where the heat exchange terminal is located; the water inlet end of the heat exchange terminal and the water inlet end of the fifth water pipe 170 are connected to the water outlet end of the indoor fan coil 140 through the sixth valve 96.

[0145] Figure 8b A schematic diagram of a method for controlling an air conditioner provided by the present application is shown, which is applied to Figure 8a In the air conditioner shown.

[0146] like Figure 8b As shown, the control method for the air conditioner includes:

[0147] Step S801, in the case of heating operation, detecting outdoor environmental parameters;

[0148] Step S802, 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.

[0149] 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.

[0150] Step S804: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0151] Step S805: 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.

[0152] Step S806: Determine the heat source for heating the outdoor heat exchanger according to the temperature of the heat exchange medium in the coil.

[0153] Here, when the heat exchange medium in the circulation pipeline provides insufficient heat to the outdoor heat exchanger and the compressor frequency reaches the upper frequency limit, the heat of the heat exchange medium is supplemented by the heat exchange medium in the coil of the fan coil unit.

[0154] Furthermore, according to the temperature of the heat exchange medium in the coil, the heat source for heating the outdoor heat exchanger is determined, including:

[0155] 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 the heat source for heating the outdoor heat exchanger.

[0156] When T5≤Ty<T4, the first valve, the fourth valve and the fifth valve are opened, and the heat exchange medium in the circulation pipeline and the heat exchange medium in the coil are used as part or all of the heat sources for heating the outdoor heat exchanger.

[0157] Wherein, Ty represents the temperature of the heat exchange medium detected 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.

[0158] Here, the heat exchange medium in the coil can reach the defrosting condition, which means that the temperature range where the heat exchange medium in the coil is located can achieve the defrosting purpose.

[0159] Therefore, when Ty≥T4, the temperature of the heat exchange medium in the coil is higher 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, and the heat exchange medium in the coil will enter the circulation pipeline through the third water pipe and flow back to the coil through the fourth water pipe. The heat exchange medium in the coil is used as the heat source for heating the outdoor heat exchanger.

[0160] 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.

[0161] Figure 9a The system schematic diagram of another air conditioner provided by the present application is shown. By adding an external heat source and connecting the indoor fan coil, a multi-heat-source system operation mode is formed.

[0162] Combined with Figure 9a As shown, the air conditioner provided by the embodiment of the present disclosure includes a refrigeration system, a refrigeration 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.

[0163] 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. 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 running, it drives the heat exchange medium to circulate in the circulation pipeline 6.

[0164] The hot water storage tank 8 includes a first water pipe 81 and a second water pipe 82, wherein 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;

[0165] The first valve 91 is disposed at one end of the first heat exchange pipe section 11. When the first valve 91 is opened, the heat exchange medium in the circulation pipeline 6 flows through the second heat exchange pipe section 12 to heat the outdoor heat exchanger 5 after completing the heat exchange in the first heat exchange pipe section 11.

[0166] The second valve 92 is disposed 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 .

[0167] 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 water tank 130 and the coil 140. One end of the third water pipe 110 is connected to one 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 one end of the connecting pipe section 150 far from the coil 140, and the other end is connected to the other end of the first heat exchange pipe section 11;

[0168] The fourth valve 94 is arranged 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.

[0169] Optionally, the air conditioner further comprises: a third valve 93, which is arranged on the second water pipe 82. When the third valve 93 is opened, part 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. Here, by setting the third valve 93, the reheating of the heat exchange medium after the temperature loss flows into the hot water storage tank is achieved.

[0170] Optionally, the air conditioner further includes: a fifth valve 95, which is disposed on the fourth water pipe 120. When the fifth valve 95 is opened, part 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. Here, by setting the fifth valve 95, the heat exchange medium flows back to maintain the gas-liquid balance in the system.

[0171] Optionally, the air conditioner further includes a plurality of heat exchange terminals 160 connected in parallel with the indoor fan coil 140. A fifth water pipe 170 is connected in parallel to the pipeline where the heat exchange terminal is located; the water inlet end of the heat exchange terminal and the water inlet end of the fifth water pipe 170 are connected to the water outlet end of the indoor fan coil 140 through the sixth valve 96.

[0172] Figure 9b A schematic diagram of a method for controlling an air conditioner provided by the present application is shown, which is applied to Figure 9a In the air conditioner shown.

[0173] like Figure 9b As shown, the control method for the air conditioner includes:

[0174] Step S901, in the case of heating operation, detecting outdoor environmental parameters;

[0175] Step S902, 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. At this time, the heat exchange medium in the circulation pipeline serves as the entire heat source for heating the outdoor heat exchanger. The first valve is opened, and the second valve, the third valve, the fourth valve, and the fifth valve are closed.

[0176] 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.

[0177] Step S904: when the compressor frequency is less than the upper frequency limit, increase the compressor frequency.

[0178] 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.

[0179] Step S906: When Tx>T2, the heat exchange medium in the hot water storage tank is used as the entire heat source for heating the outdoor heat exchanger. The first valve, the fourth valve, and the fifth valve are closed, and the second valve and the third valve are opened.

[0180] Step S907, when Tx≤T2, obtain the temperature Ty of the heat exchange medium in the coil. At this time, the heat exchange medium in the hot water storage tank is used as a partial heat source for heating the outdoor heat exchanger.

[0181] 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, third, fourth, and fifth valves are opened.

[0182] 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, second, third, fourth, and fifth valves are all opened.

[0183] 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, second, and third valves are opened, and the fourth and fifth valves are closed.

[0184] 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, second, and third valves are closed, and the fourth and fifth valves are opened.

[0185] 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, fourth, and fifth valves are opened, and the second and third valves are closed.

[0186] Optionally, when Tx < T3 and Ty < T5, push information to the user to prompt possible frosting.

[0187] Among them, 45°C < T2 < 70°C, 10°C > T3 > (T2 - 10)°C; 45°C < T4 < 60°C, 10°C > T5 > (T4 - 5°C).

[0188] Such as Fig.10As shown, the 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 also include a communication interface 1012 and a bus 1013. The processor 1010, the communication interface 1012, and the memory 1011 may communicate with each other through the bus 1013. The communication interface 1012 may be used for information transmission. The processor 1010 may call the logic instructions in the memory 1011 to execute the method for controlling the air conditioner of the above embodiment.

[0189] In addition, the logic instructions in the above-mentioned 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.

[0190] The memory 1011 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 1010 executes the function application and data processing by running the program instructions / modules stored in the memory 1011, that is, the method for controlling the air conditioner in the above embodiment is implemented.

[0191] The memory 1011 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 1011 may include a high-speed random access memory and may also include a non-volatile memory.

[0192] Combination Fig.11As shown, the embodiment of the present disclosure provides an air conditioner 1100, including an air conditioner body, 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, a circulation pipeline, a water pump, and the above-mentioned device 1000 for controlling the air conditioner. There is a flowable heat exchange medium inside the circulation pipeline, and the circulation pipeline includes: 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. The water pump is arranged in the circulation pipeline, and the water pump drives the heat exchange medium to circulate in the circulation pipeline when it is running. Among them, when the air conditioner is in heating operation, the heat exchange medium heats 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. The device 1000 for controlling the air conditioner is installed in the air conditioner body. The installation relationship described here is not limited to placement inside the product, but also includes installation connection with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection. Those skilled in the art can understand that the device 1000 for controlling an air conditioner can be adapted to a feasible product body to realize other feasible embodiments.

[0193] 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 the air conditioner can be operated without frost, thus saving production costs.

[0194] 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.

[0195] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0196] The technical solution of the embodiment of the present disclosure can 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 embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0197] 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 changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the 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 the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0198] 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 for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0199] 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 only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, 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, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed 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 according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0200] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order 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, and 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 functions or actions, 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.

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