Air conditioner, operation control method thereof, and computer storage medium

Abstract

The application provides an air conditioner, a running method thereof and a computer storage medium, comprising a first four-way valve, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a heat exchange water tank, a second four-way valve and a third four-way valve connected through refrigerant circulation pipelines; wherein the air conditioner has a first heating state and a second heating state; when the air conditioner is in the first heating state, the first four-way valve is in a first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in parallel between the outdoor heat exchanger and the first four-way valve; when the air conditioner is in the second heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in series between the outdoor heat exchanger and the first four-way valve. The application aims to solve the technical problem of high defrosting frequency in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, in particular to an air conditioner, a running control method thereof and a computer storage medium. BACKGROUND

[0002] Air conditioners include one-tube and multi-tube models. One-tube air conditioners include a model with an outdoor unit and a heat exchange water tank. When using this model in cold winter, the outdoor heat exchanger is prone to frost, which reduces the heating capacity and air outlet temperature of the air conditioner, affecting user experience.

[0003] Generally, in order to overcome this technical problem, the prior art adopts stopping heating operation after frost formation on the condenser of the outdoor unit, switching the system to refrigeration state operation, and the high-temperature gas discharged by the compressor enters the condenser to melt the frost layer on the surface. After the condenser is defrosted, it is switched to heating state operation. However, during the defrosting process, the air conditioner cannot continuously heat, and the air conditioner will perform defrosting operation every 50 minutes or so in a low temperature environment, resulting in large room temperature fluctuations and thus reducing comfort. SUMMARY

[0004] The present application provides an air conditioner, a running control method thereof and a computer storage medium, aiming to solve the technical problem of high defrosting frequency in the prior art.

[0005] The present application provides an air conditioner, a running control method thereof and a computer storage medium, aiming to solve the technical problem of high defrosting frequency in the prior art.

[0006] The air conditioner has a first heating state and a second heating state.

[0007] When the air conditioner is in the first heating state, the first four-way valve is in a first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in parallel between the outdoor heat exchanger and the first four-way valve.

[0008] When the air conditioner is in the second heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in series between the outdoor heat exchanger and the first four-way valve.

[0009] Optionally, the second four-way valve has a first port, a second port, a third port and a fourth port.

[0010] The third four-way valve has a fifth port, a sixth port, a seventh port and an eighth port;

[0011] The first port is connected with the outdoor heat exchanger, the second port is connected with the heat exchange water tank, the third port is connected with the seventh port, and the fourth port is connected with the indoor heat exchanger; the fifth port is connected with the E port of the first four-way valve, the sixth port is connected with the heat exchange water tank, and the eighth port is connected with the indoor heat exchanger;

[0012] When the air conditioner is in the first heating state, the third four-way valve is in a second working state that the fifth port is connected with the sixth port and the fifth port is connected with the eighth port, the second four-way valve is in a third working state that the first port is connected with the second port and the first port is connected with the fourth port, and the heat exchange water tank and the indoor heat exchanger are connected in parallel;

[0013] When the air conditioner is in the second heating state, the third four-way valve is in a fourth working state that the fifth port is connected with the eighth port and the sixth port is connected with the seventh port, the second four-way valve is in a fifth working state that the first port is connected with the second port and the third port is connected with the fourth port, and the heat exchange water tank and the indoor heat exchanger are connected in series.

[0014] Optionally, the air conditioner further comprises a first expansion valve and a second expansion valve, the first expansion valve is arranged on a pipeline between the second port and the heat exchange water tank, and the second expansion valve is arranged on a pipeline between the fourth port and the indoor heat exchanger;

[0015] When the air conditioner is in the second heating state, the first expansion valve is in a fully open state and the second expansion valve is in a throttling state; when the air conditioner is in the first heating state, the second expansion valve is in a throttling state.

[0016] Optionally, when the air conditioner is in the first heating state, if the medium temperature in the heat exchange water tank is higher than a first preset temperature, the first expansion valve is in a closed state.

[0017] Optionally, the air conditioner further has a first refrigeration state and a second refrigeration state;

[0018] When the air conditioner is in the first cooling state, the first four-way valve is in a sixth working state, the second four-way valve is in a seventh working state in which the first port and the fourth port are communicated, the third four-way valve is in an eighth working state in which the fifth port and the eighth port are communicated, and the second expansion valve is in an open state, and the first expansion valve is in a closed state, so that the heat exchange water tank stops running.

[0019] When the air conditioner is in the second cooling state, the first four-way valve is in the sixth working state, the third four-way valve is in a fourth working state in which the fifth port and the eighth port are communicated and the sixth port and the seventh port are communicated, the second four-way valve is in a fifth working state in which the first port and the second port are communicated and the third port and the fourth port are communicated, and the second expansion valve is in a throttling state, and the first expansion valve is in a full open state, so that the heat exchange water tank and the indoor heat exchanger are connected in series.

[0020] Optionally, the air conditioner comprises an outdoor unit, the outdoor unit comprising the outdoor heat exchanger and a fan configured to dissipate heat from the outdoor heat exchanger; when the air conditioner is in the second cooling state, the fan is in a shutdown state.

[0021] Optionally, the heat exchange water tank and the indoor heat exchanger are both arranged indoors.

[0022] Optionally, an outlet end of the compressor is connected to a D end of the first four-way valve, and an inlet end of the compressor is connected to an S end of the first four-way valve; the outdoor heat exchanger is connected to a C end of the first four-way valve.

[0023] When the air conditioner is in the first heating state and the second heating state, the S end of the first four-way valve and the C end of the first four-way valve are communicated, and the D end of the first four-way valve and the E end of the first four-way valve are communicated.

[0024] When the air conditioner is in the first cooling state and the second cooling state, the E end of the first four-way valve and the S end of the first four-way valve are communicated, and the D end of the first four-way valve and the C end of the first four-way valve are communicated.

[0025] The embodiments of the present application also propose an operation control method of an air conditioner, which is used for operating the air conditioner as described above, and comprises the following steps of:

[0026] When the air conditioner is in the first heating state, an ambient temperature is acquired.

[0027] If the environment temperature is lower than the second preset temperature, the second four-way valve and the third four-way valve are controlled to switch the working state to connect the indoor heat exchanger and the heat exchange water tank in series between the outdoor heat exchanger and the first four-way valve, so that the air conditioner operates in the second heating state.

[0028] Optionally, the operation control method further comprises:

[0029] When the air conditioner operates in the second heating state, an environment temperature is acquired.

[0030] If the environment temperature is higher than the third preset temperature, the second four-way valve and the third four-way valve are controlled to switch the working state to connect the indoor heat exchanger and the heat exchange water tank in parallel between the outdoor heat exchanger and the first four-way valve, so that the air conditioner operates in the first heating state.

[0031] When the air conditioner operates in the first heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in parallel between the outdoor heat exchanger and the first four-way valve. The high-temperature and high-pressure gas compressed by the compressor enters the indoor heat exchanger and the heat exchange water tank. The indoor air exchanges heat with the refrigerant flowing in the indoor heat exchanger, and the air temperature rises after absorbing heat. The water in the heat exchange water tank is heated by the flowing refrigerant, so that the heat exchange water tank stores heat. The refrigerant after heat exchange in the heat exchange water tank and the indoor heat exchanger enters the outdoor heat exchanger to exchange heat with outdoor air, and becomes low-temperature and low-pressure gas to return to the compressor to complete the cycle.

[0032] When the air conditioner operates in the second heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the heat exchange water tank in series between the outdoor heat exchanger and the first four-way valve. At this time, the high-temperature and high-pressure gas compressed by the compressor passes through the indoor heat exchanger and the heat exchange water tank in turn. The indoor air exchanges heat with the refrigerant flowing in the indoor heat exchanger, and the air temperature rises after absorbing heat, meeting the heating requirement of the indoor. The refrigerant medium after passing through the indoor heat exchanger flows through the heat exchange water tank to absorb the heat stored in the heat exchange water tank, so that the temperature of the refrigerant medium rises. The refrigerant medium after rising in temperature enters the outdoor heat exchanger to exchange heat with outdoor air. The technical solution of the present application can delay the frosting speed by releasing the heat in the heat exchange water tank when the air conditioner operates in the second heating state, and can maintain the air conditioner in the heating state to enable long-time continuous heating, reduce the defrosting frequency, and solve the technical problems of high defrosting frequency, large room temperature, and poor comfort in the prior art.

[0033] Therefore, the heat exchange water tank is used as a heat storage component in the technical scheme of the present application; the heat exchange water tank is connected in parallel with the indoor heat exchanger to absorb heat and store heat when the system is in normal heating; when defrosting is needed, the heat exchange water tank is connected in series with the indoor heat exchanger to release heat as a heat source to delay the frosting speed of the air conditioner, prolong the continuous heating time and improve the heating effect, and improve the problems of room temperature fluctuation and poor comfort.

[0034] In addition, the heat exchange water tank in the embodiment of the present application can also perform heat recovery when the air conditioner is in a cooling state. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0036] Figure 1 is a schematic diagram of the running principle of the air conditioner in the first heating state provided by the embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the running principle of the air conditioner in the second heating state provided by the embodiment of the present application;

[0038] Figure 3 is a schematic diagram of the running principle of the air conditioner in the first cooling state provided by the embodiment of the present application;

[0039] Figure 4 is a schematic diagram of the running principle of the air conditioner in the second cooling state provided by the embodiment of the present application;

[0040] Figure 5 is a flowchart of the running control method of the air conditioner in the first heating state switching to the second heating state provided by the embodiment of the present application;

[0041] Figure 6 is a flowchart of the running control method of the air conditioner in the second heating state switching to the first heating state provided by the embodiment of the present application;

[0042] Figure 7 is a flowchart of the running control method of the air conditioner in the first cooling state and the second cooling state switching to each other provided by the embodiment of the present application;

[0043] Figure 8 is a Mollier diagram (lgP-h diagram) of the refrigerant in the first and second heating states of the air conditioner provided by the embodiment of the present application.

[0044] List of reference signs

[0045] 10 First four-way valve 100 Outdoor unit 20 Compressor 1 First port 30 Outdoor heat exchanger 2 Second port 40 Heat exchange water tank 3 Third port 50 Indoor heat exchanger 4 Fourth port 60 Second four-way valve 5 Fifth port 70 Third four-way valve 6 Sixth port 80 First expansion valve 7 Seventh port 90 Second expansion valve 8 Eighth port DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the protection scope of the present application.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0048] In the present application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, for purposes of explanation, specific details are set forth. It is apparent to those skilled in the art that the present application can be practiced without using these specific details. In other instances, well-known structures and processes are not described in detail in order to avoid obscuring the description of the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features presented herein.

[0049] Reference is made to Figure 1 and Figure 2As shown, the application provides an air conditioner, which comprises a first four-way valve 10, a compressor 20, an outdoor heat exchanger 30, an indoor heat exchanger 50, a heat exchange water tank 40, a second four-way valve 60 and a third four-way valve 70 connected by refrigerant circulation pipelines. The indoor heat exchanger 50, the heat exchange water tank 40, the second four-way valve 60 and the third four-way valve 70 are arranged between the first four-way valve 10 and the outdoor heat exchanger 30. In the technical scheme of the embodiment of the application, the air conditioner has a first heating state and a second heating state.

[0050] When the air conditioner is in the first heating state, the first four-way valve 10 is in a first working state, and the second four-way valve 60 and the third four-way valve 70 are configured to arrange the indoor heat exchanger 50 and the heat exchange water tank 40 in parallel between the outdoor heat exchanger 30 and the first four-way valve 10. The high-temperature and high-pressure gas compressed by the compressor 20 enters the indoor heat exchanger 50 and the heat exchange water tank 40 respectively. The indoor air exchanges heat with the refrigerant flowing in the indoor heat exchanger 50, and the temperature of the air rises after absorbing heat. The water in the heat exchange water tank 40 is heated by the flowing refrigerant, so that the heat exchange water tank 40 stores heat. The refrigerant after heat exchange in the heat exchange water tank 40 and the indoor heat exchanger 50 enters the outdoor heat exchanger 30 to exchange heat with outdoor air, and becomes low-temperature and low-pressure gas to return to the compressor 20, completing the cycle.

[0051] When the air conditioner is in the second heating state, the first four-way valve 10 is in the first working state, and the second four-way valve 60 and the third four-way valve 70 are configured to arrange the indoor heat exchanger 50 and the heat exchange water tank 40 in series between the outdoor heat exchanger 30 and the first four-way valve 10. At this time, the high-temperature and high-pressure gas compressed by the compressor 20 passes through the indoor heat exchanger 50 and the heat exchange water tank 40 in turn; the indoor air exchanges heat with the refrigerant flowing in the indoor heat exchanger 50, and the temperature of the air rises after absorbing heat, meeting the requirement of increasing the temperature of indoor air; the refrigerant medium after passing through the indoor heat exchanger 50 flows through the heat exchange water tank 40 to absorb the heat stored in the heat exchange water tank 40, so that the temperature of the refrigerant medium rises, and the refrigerant medium after rising in temperature enters the outdoor heat exchanger 30 to exchange heat with outdoor air. The technical scheme of the application can delay the frosting speed by releasing the heat in the heat exchange water tank 40 when the air conditioner is in the second heating state, and can maintain the air conditioner in the heating state to enable long-time continuous heating, solving the technical problem of high defrosting frequency leading to high room temperature and poor comfort in the prior art.

[0052] In addition, with reference to Figure 8As shown, when the air conditioner is in the first heating state, the heating cycle of the air conditioner is performed according to 1-2-3-4, the evaporation pressure is PL, and the corresponding saturated evaporation temperature is TV; the condensation pressure is PH, and the corresponding saturated condensation temperature is TC. When the air conditioner is in the second heating state, the heating cycle of the air conditioner is performed according to 1a-2a-3a-4a, the evaporation pressure is PLa, and the corresponding saturated evaporation temperature is TVa; the condensation pressure is PHa, and the corresponding saturated evaporation temperature is TCa. Since in the second heating state, the refrigerant absorbs heat from the heat exchange water tank 40, the heat absorption amount increases significantly, so the evaporation pressure PL rises to PLa, and the saturated evaporation temperature rises from TV to TVa; due to the rise of the saturated evaporation temperature, the temperature difference between the refrigerant and the outdoor air decreases, the speed of frosting decreases, and the frosting is effectively placed. In addition, after the evaporation pressure rises, the high pressure PH of the system also rises to PHa, the saturated condensation temperature rises from TC to TCa, the temperature difference between the refrigerant and the indoor air increases, the air outlet temperature of the air conditioner improves, and the heating effect is improved.

[0053] Therefore, in the technical scheme of the present application, the heat exchange water tank 40 serves as a heat storage component; the heat exchange water tank 40 is connected in parallel with the indoor heat exchanger 50 to absorb heat and store under normal heating conditions; when defrosting is needed, the heat exchange water tank 40 is connected in series with the indoor heat exchanger 50 to release heat as a heat source, so that heating and defrosting can be completed at the same time, the frosting speed of the air conditioner is slowed down, the continuous heating time is prolonged, and the heating effect is improved, thereby improving the problem of room temperature fluctuation and poor comfort.

[0054] Referring to Figure 1 and Figure 2 As an optional implementation of the above embodiment, the second four-way valve 60 has a first port 1, a second port 2, a third port 3 and a fourth port 4. The third four-way valve 70 has a fifth port 5, a sixth port 6, a seventh port 7 and an eighth port 8. When switching the heating state, the communication state between each port in the second four-way valve 60 and the third four-way valve 70 is switched to achieve the purpose of connecting the indoor heat exchanger 50 and the heat exchange water tank 40 in parallel or in series.

[0055] Specifically, referring to Figure 1 and Figure 2 The first port 1 is connected to the outdoor heat exchanger 30, the second port 2 is connected to the heat exchange water tank 40, the third port 3 is connected to the seventh port 7, and the fourth port 4 is connected to the indoor heat exchanger 50; the fifth port 5 is connected to the E port of the first four-way valve 10, the sixth port 6 is connected to the heat exchange water tank 40, and the eighth port 8 is connected to the indoor heat exchanger 50.

[0056] As Figure 1As shown, when the air conditioner is in the first heating state, the third four-way valve 70 is in a second operating state where the fifth port 5 is connected to the sixth port 6 and the fifth port 5 is connected to the eighth port 8. The second four-way valve 60 is in a third operating state where the first port 1 is connected to the second port 2 and the first port 1 is connected to the fourth port 4. The hot water tank 40 and the indoor heat exchanger 50 are connected in parallel. When the air conditioner is in the first heating state, the refrigerant compressed by the compressor 20 is discharged from the E end of the first four-way valve 10 as high-temperature and high-pressure refrigerant, then enters the third four-way valve 70 through the fifth port 5 of the second four-way valve 60, and is then discharged into the hot water tank 40 and the indoor heat exchanger 50 through the sixth port 6 and the seventh port 7, respectively. The refrigerant after passing through the indoor heat exchanger 50 flows into the second four-way valve 60 through the fourth port 4. The refrigerant after passing through the hot water tank 40 flows into the second four-way valve 60 through the second port 2. Then, after converging at the first port 1, it passes through the outdoor heat exchanger 30 and then flows into the compressor 20 through the first four-way valve 10, completing the cycle.

[0057] like Figure 2 As shown, when the air conditioner is in the second heating state, the third four-way valve 70 is in the fourth working state where the fifth port 5 and the eighth port 8 are connected and the sixth port 6 and the seventh port 7 are connected, the second four-way valve 60 is in the fifth working state where the first port 1 and the second port 2 are connected and the third port 3 and the fourth port 4 are connected, and the hot water tank 40 and the indoor heat exchanger 50 are connected in series.

[0058] When the air conditioner is in its first heating state, the refrigerant compressed by the compressor 20 is discharged from the E end of the first four-way valve 10. The high-temperature and high-pressure refrigerant flows through the fifth port 5 and the eighth port 8 of the third four-way valve 70 to the indoor heat exchanger 50. Then, it flows through the fourth port 4 and the third port 3 of the second four-way valve 60, and the seventh port 7 and the sixth port 6 of the third four-way valve 70 to the hot water tank 40. Then, it flows through the second port 2 and the first port 1 of the second four-way valve 60 to the outdoor heat exchanger 30. Finally, it flows through the first four-way valve 10 to the compressor 20, completing the heating cycle.

[0059] Reference Figure 1 and Figure 2 As shown, as an optional implementation of the above embodiment, the air conditioner further includes a first expansion valve 80 and a second expansion valve 90. The first expansion valve 80 is disposed on the pipeline between the second port 2 and the hot water tank 40, and the second expansion valve 90 is disposed on the pipeline between the fourth port 4 and the indoor heat exchanger 50.

[0060] When the air conditioner is in the second heating state, the first expansion valve 80 is in a full open state and the second expansion valve 90 is in a throttling state. The high-temperature and high-pressure refrigerant gas is cooled and changed into a high-temperature and high-pressure liquid after heat exchange with indoor air in the indoor heat exchanger 50, and then enters the heat exchange water tank 40 after pressure reduction by the second expansion valve 90. The low-temperature and low-pressure refrigerant in the heat exchange water tank 40 exchanges heat with high-temperature water, and the high-temperature water releases the stored heat and is cooled, and the low-temperature and low-pressure refrigerant absorbs heat. Then, the refrigerant with high temperature enters the outdoor heat exchanger 30 after passing through the first expansion valve 80 in the full open state, and exchanges heat with outdoor air, so as to slow down the frosting speed.

[0061] When the air conditioner is in the first heating state, the second expansion valve 90 is in a throttling state. The refrigerant is changed into a high-temperature and high-pressure liquid after heat exchange with indoor air in the indoor heat exchanger 50, and then enters the outdoor heat exchanger 30 after pressure reduction by the second expansion valve 90. At this time, the first expansion valve 80 can be in a throttling state or a closed state. That is, when the heat exchange water tank 40 needs to store heat, the first expansion valve 80 is in a throttling state, and the refrigerant medium needs to circulate through the heat exchange water tank 40. The refrigerant is changed into a high-temperature and high-pressure liquid after heat exchange with the medium in the heat exchange water tank 40, and then enters the outdoor heat exchanger 30 after pressure reduction by the second expansion valve 90. When the heat exchange water tank 40 does not need to store heat, the first expansion valve 80 is closed, and the refrigerant medium cannot pass through the heat exchange water tank 40.

[0062] In an embodiment, when the air conditioner is in the first heating state, if the temperature of the medium in the heat exchange water tank 40 is higher than a first preset temperature, the first expansion valve 80 is in a closed state. When the first expansion valve 80 is in a throttling state, the refrigerant medium needs to circulate through the heat exchange water tank 40, and the refrigerant is changed into a high-temperature and high-pressure liquid after heat exchange with the medium in the heat exchange water tank 40, and the temperature of the water in the heat exchange water tank 40 gradually rises. When the temperature of the water in the heat exchange water tank 40 rises to the first preset temperature, the first expansion valve 80 can be in a closed state, so as to reduce the energy consumption of the air conditioner. At this time, the heating cycle of the air conditioner is: compressor 20-first four-way valve 10-third four-way valve 70-indoor heat exchanger 50-second four-way valve 60-outdoor heat exchanger 30-first four-way valve 10-compressor 20.

[0063] In this embodiment, the first preset temperature is typically set between 45°C and 55°C, for example, 50°C. That is, when the air conditioner is operating in its first heating mode, when the water temperature in the hot water tank 40 rises to 50°C, the first expansion valve 80 closes, and the hot water tank 40 is not included in the air conditioner's heating cycle. When defrosting heating is required, the first expansion valve 80 opens (fully open), and the second four-way valve 60 and the third four-way valve 70 switch to their corresponding fifth and fourth operating states to absorb heat from the water in the hot water tank 40, thus slowing down the frosting process. In this embodiment, the hot water tank 40 has an insulation layer to reduce heat loss.

[0064] Combination Figure 3 and Figure 4 As shown, as an optional implementation of the above embodiment, the air conditioner also has a first cooling state and a second cooling state. The first four-way valve 10 is a functional element of the air conditioner that switches between heating and cooling. When the first four-way valve 10 is in the first working state, the high-temperature and high-pressure gas discharged by it flows to the indoor heat exchanger 50, heats the indoor air, and then flows to the outdoor heat exchanger 30; when the first four-way valve 10 is in the sixth working state, the high-temperature and high-pressure gas discharged by it flows to the outdoor heat exchanger 30, releases heat to the outdoor air, and then flows to the indoor heat exchanger 50 to cool the indoor air.

[0065] like Figure 3 As shown, when the air conditioner is in the first cooling state, the first four-way valve 10 is in the sixth operating state, the second four-way valve 60 is in the seventh operating state with the first port 1 and the fourth port 4 connected, the third four-way valve 70 is in the eighth operating state with the fifth port 5 and the eighth port 8 connected, and the second expansion valve 90 is in the open state, while the first expansion valve 80 is in the closed state, causing the hot water tank 40 to stop operating. In this embodiment, the hot water tank 40 is not included in the refrigeration cycle, and the air conditioner is in a normal cooling state. High-temperature, high-pressure gas is discharged to the outdoor heat exchanger 30 through the first four-way valve 10. After the refrigerant releases heat in the outdoor heat exchanger 30, it changes phase to a high-temperature, high-pressure liquid. After passing through the first port 1 and the fourth port 4 of the second four-way valve 60, it changes phase to a low-temperature, low-pressure refrigerant liquid after being throttled and depressurized by the first expansion valve 80. It then exchanges heat with the indoor air through the indoor heat exchanger 50, which lowers the indoor air temperature. Subsequently, the refrigerant changes phase to a low-temperature, low-pressure gas and is discharged to the compressor 20 through the first four-way valve 10. The compressor 20 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, completing the refrigeration cycle.

[0066] like Figure 4As shown, when the air conditioner is in the second refrigeration state, the first four-way valve 10 is in the sixth working state, the third four-way valve 70 is in the fourth working state of the fifth port 5 and the eighth port 8 being in conduction and the sixth port 6 and the seventh port 7 being in conduction, the second four-way valve 60 is in the fifth working state of the first port 1 and the second port 2 being in conduction and the third port 3 and the fourth port 4 being in conduction, and the second expansion valve 90 is in the throttling state, the first expansion valve 80 is in the fully open state, and the heat exchange water tank 40 and the indoor heat exchanger 50 are in series. At this time, the heat exchange water tank 40 is added to the refrigerant circulation to perform heat recovery.

[0067] The high-temperature and high-pressure gas is discharged to the outdoor heat exchanger 30 through the first four-way valve 10. The refrigerant sequentially passes through the outdoor heat exchanger 30, the first port 1 and the second port 2 of the second four-way valve 60, and then flows to the heat exchange water tank 40 through the first expansion valve 80 to heat the medium in the heat exchange water tank 40, thereby storing heat. At this time, the refrigerant is changed into high-temperature and high-pressure refrigerant due to heat release, and then passes through the sixth port 6 and the seventh port 7 of the third four-way valve 70 and the third port 3 and the fourth port 4 of the second four-way valve 60, is changed into low-temperature and low-pressure liquid after being throttled by the first throttling valve, flows to the indoor heat exchanger 50, and exchanges heat with indoor air, so that the temperature of the indoor air is reduced, and then the refrigerant is changed into low-temperature and low-pressure gas, is discharged to the compressor 20 through the first four-way valve 10, and the compressor 20 compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, thereby completing the refrigeration cycle.

[0068] As an optional implementation of the above embodiment, the air conditioner comprises an outdoor unit 100 (not shown) comprising the outdoor heat exchanger 30 and a fan configured to dissipate heat from the outdoor heat exchanger 30. When the air conditioner is in the second refrigeration state, the fan is in a stopped state. When the air conditioner operates in the second refrigeration state, the fan of the outdoor unit 100 is usually in a closed state to facilitate heat storage of the heat exchange water tank 40.

[0069] Of course, in some embodiments, when the air conditioner is in the second refrigeration state, the fan is in a started state according to the required heat storage amount of the heat exchange water tank 40 and the temperature of the medium in the heat exchange water tank 40. For example, when the required heat storage amount of the heat exchange water tank 40 is not high and the temperature of the medium in the heat exchange water tank 40 reaches a high temperature, the fan is in a started state.

[0070] When the air conditioner is in the first refrigeration state, the fan is in a started state; when the air conditioner is in the first heating state, the fan is in a started state; and when the air conditioner is in the second heating state, the fan is in a started state.

[0071] As an optional implementation of the above embodiment, the heat exchange water tank 40 and the indoor heat exchanger 50 are both arranged indoors.

[0072] Referring to Figures 1 to 4 As an optional implementation of the above embodiment, the outlet end of the compressor 20 is connected with the D end of the first four-way valve 10, the inlet end of the compressor 20 is connected with the S end of the first four-way valve 10, and the outdoor heat exchanger 30 is connected with the C end of the first four-way valve 10.

[0073] When the air conditioner is in the first heating state and the second heating state, the S end of the first four-way valve 10 and the C end of the first four-way valve 10 are communicated, and the D end of the first four-way valve 10 and the E end of the first four-way valve 10 are communicated. At this time, the low-temperature and low-pressure refrigerant gas passing through the outdoor heat exchanger 30 is discharged to the inlet end of the compressor 20 through the C end and the S end, and is compressed into high-temperature and high-pressure refrigerant gas by the compressor 20, and is discharged to the third four-way valve 70 through the D end and the E end, to perform a heating cycle.

[0074] When the air conditioner is in the first cooling state and the second cooling state, the E end of the first four-way valve 10 and the S end of the first four-way valve 10 are communicated, and the D end of the first four-way valve 10 and the C end of the first four-way valve 10 are communicated. At this time, the low-temperature and low-pressure refrigerant gas passing through the indoor heat exchanger 50 is discharged to the inlet end of the compressor 20 through the E end and the S end, and is compressed into high-temperature and high-pressure refrigerant gas by the compressor 20, and is discharged to the outdoor heat exchanger 30 through the D end and the C end, to perform a cooling cycle.

[0075] The embodiment of the present application also proposes an operation control method of an air conditioner, which is used for the air conditioner as described above, such as Figure 5 As shown in the figure, the operation control method comprises the following steps.

[0076] S100, when the air conditioner is operated in the first heating state, an ambient temperature is acquired.

[0077] S200, if the ambient temperature is lower than a second preset temperature, the second four-way valve 60 and the third four-way valve 70 are controlled to switch the working state to connect the indoor heat exchanger 50 and the heat exchange water tank 40 between the outdoor heat exchanger 30 and the first four-way valve 10, so that the air conditioner is operated in the second heating state.

[0078] In this embodiment, when the air conditioner maintains the first heating state, when the ambient temperature is lower than the second preset temperature, the outdoor heat exchanger 30 is at risk of frosting, at this time, the second four-way valve 60 and the third four-way valve 70 are switched to the working state to connect the indoor heat exchanger 50 and the heat exchange water tank 40 in series, so that the refrigerant flows to the outdoor heat exchanger 30 after taking heat from the heat exchange water tank 40, so as to slow down the frosting speed of the outdoor heat exchanger 30, prolong the heating time, reduce the fluctuation of indoor heating, and improve the comfort.

[0079] Specifically, the second four-way valve 60 has a first port 1, a second port 2, a third port 3 and a fourth port 4; the third four-way valve 70 has a fifth port 5, a sixth port 6, a seventh port 7 and an eighth port 8; wherein the first port 1 is connected with the outdoor heat exchanger 30, the second port 2 is connected with the heat exchange water tank 40, the third port 3 is connected with the seventh port 7, and the fourth port 4 is connected with the indoor heat exchanger 50; the fifth port 5 is connected with the E end of the first four-way valve 10, the sixth port 6 is connected with the heat exchange water tank 40, and the eighth port 8 is connected with the indoor heat exchanger 50.

[0080] In the first heating state of the air conditioner, the third four-way valve 70 is in the second working state that the fifth port 5 and the sixth port 6 are conductive and the fifth port 5 and the eighth port 8 are conductive, the second four-way valve 60 is in the third working state that the first port 1 and the second port 2 and the first port 1 and the fourth port 4 are conductive, and the heat exchange water tank 40 and the indoor heat exchanger 50 are connected in parallel.

[0081] In the second heating state of the air conditioner, the third four-way valve 70 is in the fourth working state that the fifth port 5 and the eighth port 8 are conductive and the sixth port 6 and the seventh port 7 are conductive, the second four-way valve 60 is in the fifth working state that the first port 1 and the second port 2 are conductive and the third port 3 and the fourth port 4 are conductive, and the heat exchange water tank 40 and the indoor heat exchanger 50 are connected in series.

[0082] That is, when the ambient temperature is lower than the second preset temperature, the third four-way valve 70 is switched from the second working state to the fourth working state, and the second four-way valve 60 is switched from the third working state to the fifth working state.

[0083] In the embodiment, the second preset temperature is usually set to 0-5℃, for example, it can be set to 2℃.

[0084] In the technical scheme of the embodiment of the present application, the control method further includes at least one of the following steps:

[0085] switching the air conditioner in the second heating state to operate in the first heating state;

[0086] switching the air conditioner in the second cooling state to operate in the first cooling state;

[0087] switching the air conditioner in the first cooling state to operate in the second cooling state;

[0088] switching the air conditioner in the second heating state to operate in the first cooling state or the second cooling state;

[0089] switching the air conditioner in the first heating state to operate in the first cooling state or the second cooling state;

[0090] switching the air conditioner in the second cooling state to operate in the first heating state or the second heating state;

[0091] switching the air conditioner in the first cooling state to operate in the first heating state or the second heating state.

[0092] For example, referring to FIG. 1, Figure 6 the operation control method comprises:

[0093] S300, acquiring an ambient temperature when the air conditioner operates in the second heating state;

[0094] S400, if the ambient temperature is higher than a third preset temperature, controlling the second four-way valve 60 and the third four-way valve 70 to switch the working state to connect the indoor heat exchanger 50 and the heat exchange water tank 40 in parallel between the outdoor heat exchanger and the first four-way valve 10, so that the air conditioner operates in the first heating state.

[0095] For example, referring to FIG. 1, Figure 7 the operation control method further comprises:

[0096] S500, based on the user hot water instruction, when the air conditioner operates in the first cooling state, controlling the second four-way valve 60 and the third four-way valve 70 to switch the working state to connect the indoor heat exchanger 50 and the heat exchange water tank 40 in series between the outdoor heat exchanger and the four-way valve, so that the air conditioner operates in the second cooling state;

[0097] S600, based on the user switching instruction, when the air conditioner operates in the second cooling state, controlling the second four-way valve 60 and the third four-way valve 70 to switch the working state to connect the indoor heat exchanger 50 and the heat exchange water tank 40 in parallel between the outdoor heat exchanger and the four-way valve, and controlling the first expansion valve to be closed, so that the air conditioner operates in the first cooling state.

[0098] In the method, when the user needs hot water, the user sends a hot water instruction to the air conditioner; and when the user does not need hot water, the user sends a switching instruction to the air conditioner. The embodiment of the application further provides an operation control system of an air conditioner, which comprises one or more processors, a computer storage medium, and one or more application programs, wherein the one or more application programs are stored in the computer storage medium and are configured to be executed by the processor to implement the operation control method of the air conditioner.

[0099] The processor can include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor can be implemented in at least one of a hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor can also include a main processor and a coprocessor. The main processor is a processor for processing data in a wake-up state, also referred to as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor can be integrated with a GPU (Graphics Processing Unit) that is responsible for rendering and drawing of content required to be displayed on a display screen. The processor can further include an AI (Artificial Intelligence) processor for processing a control method operation of the control system of the air conditioner. The control method model of the control system of the air conditioner can be autonomously trained and learned to improve efficiency and accuracy.

[0100] The computer-readable storage medium can be non-transitory. The computer-readable storage medium is arranged in the memory, which can further include a high-speed random access memory, and a nonvolatile memory such as one or more disk storage devices, flash storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory is used to store at least one instruction for being executed by the processor to implement the operation control method of the control system of the air conditioner provided by the method embodiment of the application.

[0101] The above describes in detail the air conditioner and the operation control method and the computer storage medium provided by the embodiment of the application. The principles and implementation manners of the application are described by applying specific examples. The above embodiment description is only used to help understand the method of the application and the core idea thereof. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the application. In conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. An air conditioner, characterized in that, It includes a first four-way valve, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a hot water tank, a second four-way valve, and a third four-way valve connected by a refrigerant circulation pipeline; the indoor heat exchanger, the hot water tank, the second four-way valve, and the third four-way valve are disposed between the first four-way valve and the outdoor heat exchanger; The air conditioner has a first heating state and a second heating state. When the air conditioner is in the first heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the hot water tank in parallel between the outdoor heat exchanger and the first four-way valve. When the air conditioner is in the second heating state, the first four-way valve is in the first working state, and the second four-way valve and the third four-way valve are configured to connect the indoor heat exchanger and the hot water tank in series between the outdoor heat exchanger and the first four-way valve. The second four-way valve has a first port, a second port, a third port, and a fourth port. The air conditioner also includes a first expansion valve and a second expansion valve. The first expansion valve is disposed on the pipeline between the second port and the hot water tank, and the second expansion valve is disposed on the pipeline between the fourth port and the indoor heat exchanger. Specifically, when the air conditioner is in the second heating state, the first expansion valve is in the fully open state and the second expansion valve is in the throttling state; when the air conditioner is in the first heating state, the second expansion valve is in the throttling state.

2. The air conditioner as described in claim 1, characterized in that, The third four-way valve has a fifth port, a sixth port, a seventh port, and an eighth port; Wherein, the first port is connected to the outdoor heat exchanger, the second port is connected to the hot water tank, the third port is connected to the seventh port, and the fourth port is connected to the indoor heat exchanger; the fifth port is connected to the E end of the first four-way valve, the sixth port is connected to the hot water tank, and the eighth port is connected to the indoor heat exchanger; When the air conditioner is in the first heating state, the third four-way valve is in the second working state where the fifth port is connected to the sixth port and the fifth port is connected to the eighth port, and the second four-way valve is in the third working state where the first port is connected to the second port and the first port is connected to the fourth port. The hot water tank and the indoor heat exchanger are connected in parallel. When the air conditioner is in the second heating state, the third four-way valve is in the fourth working state where the fifth port is connected to the eighth port and the sixth port is connected to the seventh port, and the second four-way valve is in the fifth working state where the first port is connected to the second port and the third port is connected to the fourth port. The hot water tank and the indoor heat exchanger are connected in series.

3. The air conditioner as described in claim 2, characterized in that, When the air conditioner is in the first heating state, if the temperature of the medium in the hot water tank is higher than the first preset temperature, the first expansion valve is in the closed state.

4. The air conditioner as described in claim 3, characterized in that, The air conditioner also has a first cooling state and a second cooling state; When the air conditioner is in the first cooling state, the first four-way valve is in the sixth working state, the second four-way valve is in the seventh working state where the first port and the fourth port are connected, the third four-way valve is in the eighth working state where the fifth port and the eighth port are connected, and the second expansion valve is in the open state and the first expansion valve is in the closed state, so that the hot water tank stops operating. When the air conditioner is in the second cooling state, the first four-way valve is in the sixth working state, the third four-way valve is in the fourth working state where the fifth port is connected to the eighth port and the sixth port is connected to the seventh port, the second four-way valve is in the fifth working state where the first port is connected to the second port and the third port is connected to the fourth port, the second expansion valve is in the throttling state, the first expansion valve is in the fully open state, and the hot water tank and the indoor heat exchanger are connected in series.

5. The air conditioner as described in claim 4, characterized in that, The air conditioner includes an outdoor unit, the outdoor unit includes an outdoor heat exchanger and a fan, and the fan is configured to dissipate heat from the outdoor heat exchanger. When the air conditioner is in the second cooling state, the fan is in the off state.

6. The air conditioner as described in any one of claims 1 to 5, characterized in that, Both the hot water tank and the indoor heat exchanger are located indoors.

7. The air conditioner as described in any one of claims 1 to 5, characterized in that, The compressor's outlet end is connected to the D end of the first four-way valve, and the compressor's inlet end is connected to the S end of the first four-way valve; the outdoor heat exchanger is connected to the C end of the first four-way valve. When the air conditioner is in the first heating state and the second heating state, the S end of the first four-way valve is connected to the C end of the first four-way valve, and the D end of the first four-way valve is connected to the E end of the first four-way valve. When the air conditioner is in the first cooling state and the second cooling state, the E end and S end of the first four-way valve are connected, and the D end and C end of the first four-way valve are connected.

8. A method for controlling the operation of an air conditioner, characterized in that, For controlling the operation of the air conditioner according to any one of claims 1 to 7, comprising: When the air conditioner is in the first heating state, the ambient temperature is obtained; If the ambient temperature is lower than the second preset temperature, the second four-way valve and the third four-way valve are controlled to switch their working states to connect the indoor heat exchanger and the hot water tank in series between the outdoor heat exchanger and the first four-way valve, so that the air conditioner operates in the second heating state.

9. A computer storage medium, characterized in that, The computer storage medium memory stores a computer program, which is loaded by a processor to execute the steps of the air conditioner operation control method of claim 8.

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