Heat storage defrosting system, air conditioner and control method

Abstract

The application relates to a heat storage defrosting system, an air conditioner and a control method, and relates to the technical field of air conditioners, and solves the problem that, in the prior art, when a unit is defrosted, heat supply to a user is stopped, causing indoor environment temperature to fluctuate. The heat storage defrosting system comprises a heat storage module, a defrosting module and a refrigerant circulation module, wherein the heat storage module is arranged outside a compressor motor in the refrigerant circulation module, the defrosting module is arranged around a fin heat exchanger in the refrigerant circulation module, when the unit needs to be defrosted or the like, heat carrier in a heat exchange pipeline in the heat storage module can absorb heat generated by the compressor motor and is transported to the defrosting module, the defrosting module sprays the heat carrier towards the fin heat exchanger, heating circulation does not need to be stopped, and defrosting operation can be performed through the separately arranged defrosting module. The heat storage defrosting system can be operated without stopping heating when defrosting, so that the indoor temperature is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, specifically relates to a heat storage defrosting system, air conditioner and control method. BACKGROUND

[0002] With the continuous improvement of people's requirements for indoor environment in winter, heat pump type air conditioners are applied more and more, but when the outdoor temperature is low and the humidity is large in winter, the fins of the outdoor heat exchanger will appear frost phenomenon. Frost blocks the air passage, increases the heat transfer resistance on the air side, resulting in a significant decline in the heating capacity of the unit, so it is necessary to periodically defrost the evaporator.

[0003] At present, the defrosting technology of the unit mainly stops heating to the user, and the air conditioner is temporarily switched from heating mode to cooling mode, but this will cause the indoor temperature to be low.

[0004] For example, patent number 202123188564.7 discloses an air source heat pump heat storage defrosting system, but when heat storage defrosting, stopping heating to the user will also cause fluctuations in indoor environmental temperature, affecting user indoor comfort.

[0005] The applicant found that the prior art at least has the following technical problems:

[0006] The existing unit will stop heating to the user when defrosting, which is easy to cause fluctuations in indoor environmental temperature and affect user indoor comfort. SUMMARY

[0007] Therefore, the purpose of the present application is to provide a heat storage defrosting system, air conditioner and control method to solve the technical problem that the unit stops heating to the user when defrosting in the prior art, causing fluctuations in indoor environmental temperature.

[0008] To achieve the above purpose, the present application provides the following technical solutions:

[0009] According to a first aspect of the embodiment of the present application, a heat storage defrosting system is provided, comprising a heat storage module, a defrosting module and a refrigerant circulation module, wherein the heat storage module is arranged outside the compressor motor in the refrigerant circulation module, the defrosting module is arranged around the fin heat exchanger in the refrigerant circulation module, and the heat storage module The heat carrier in the heat exchange pipeline can absorb the heat generated by the compressor motor and be transported to the defrosting module to spray heat carrier towards the fin heat exchanger through the defrosting module.

[0010] As an optional embodiment of the present application, the heat storage module comprises a heat storage part, a heat exchange pipeline and a heat storage material, the heat storage part forms a heat storage cavity, the heat exchange pipeline and the heat storage material are arranged in the heat storage cavity, and the heat storage material is arranged outside the heat exchange pipeline. The outlet end of the heat exchange pipeline can pass through the heat storage cavity and communicate with the defrosting module.

[0011] As an optional embodiment of the present application, the defrosting module comprises a heat exchange part and a spraying part, the heat exchange pipeline communicates with the heat exchange part, the spraying part is installed on the heat exchange part, and the spray outlet of the spraying part faces the finned heat exchanger.

[0012] As an optional embodiment of the present application, the heat storage defrosting system further comprises a heat storage module, the heat storage module communicates with the heat exchange pipeline arranged outside the heat storage cavity, and the liquid in the heat storage module mixes with the heat carrier in the heat exchange pipeline and then flows to the heat exchange part.

[0013] As an optional embodiment of the present application, a first control valve is arranged on the connecting pipeline between the heat storage module and the heat exchange pipeline arranged outside the heat storage cavity.

[0014] As an optional embodiment of the present application, the heat storage module communicates with the heat exchange pipeline, a second control valve is arranged on the connecting pipeline between the heat storage module and the heat exchange pipeline, and the amount of heat carrier flowing into the heat storage module from the heat exchange pipeline can be controlled through the second control valve.

[0015] As an optional embodiment of the present application, the heat exchange part communicates with the heat storage module, a third control valve is arranged on the connecting pipeline between the heat exchange part and the heat storage module, and the heat carrier in the heat exchange pipeline can flow into the heat storage module after being heat-exchanged by the heat exchange part.

[0016] As an optional embodiment of the present application, the heat storage module comprises a heat storage tank and an electric auxiliary heating part arranged inside the heat storage tank, the liquid outlet of the heat storage tank respectively communicates with the heat exchange pipeline arranged outside the heat storage cavity and the user side, and the liquid inlet of the heat storage tank respectively communicates with the heat exchange pipeline arranged outside the heat storage cavity and the heat exchange part.

[0017] As an optional embodiment of the present application, an auxiliary branch is arranged between the heat exchange part and the inlet of the heat exchange pipeline, a fourth control valve is arranged on the auxiliary branch, and the heat carrier in the heat exchange pipeline flows back into the heat exchange pipeline through the auxiliary branch after being heat-exchanged by the heat exchange part and the finned heat exchanger.

[0018] As an optional embodiment of the present application, the refrigerant circulation module comprises a compressor, and an oil separator, a finned heat exchanger, a dry filter, an expansion valve, a shell-and-tube heat exchanger and a suction port of the compressor are sequentially connected along a direction of a discharge port of the compressor to form a circuit, and the compressor motor is electrically connected with the compressor.

[0019] According to a second aspect of the embodiments of the present application, an air conditioner is provided, comprising the heat storage defrosting system.

[0020] According to a third aspect of the embodiments of the present application, a control method of the heat storage defrosting system is provided, for controlling the heat storage defrosting system, comprising:

[0021] In the heating mode of the air conditioner, an actual running frequency of the fan is obtained;

[0022] According to the actual running frequency and the frosting fan running frequency, a running mode of the heat storage defrosting system is determined, wherein the running mode is a defrosting mode, a frost suppression mode and a dust removal mode.

[0023] As an optional embodiment of the present application, the heat storage defrosting system comprises a heat storage module, a defrosting module, a refrigerant circulation module and a heat storage module, the heat exchange pipeline of the heat storage module is connected with the liquid inlet of the defrosting module and the heat storage module respectively, the liquid outlet of the heat storage module is connected with the heat exchange pipeline and a first control valve is arranged on the connecting pipeline between them, a second control valve is arranged on the connecting pipeline between the heat exchange pipeline and the liquid inlet of the heat storage module, the liquid inlet of the defrosting module is connected with the liquid inlet of the heat storage module and a third control valve is arranged on the connecting pipeline between them, an auxiliary branch is arranged between the defrosting module and the inlet of the heat exchange pipeline of the heat storage module and a fourth control valve is arranged on the auxiliary branch.

[0024] As an optional embodiment of the present application, the running mode is respectively:

[0025] The defrosting mode: the first control valve is controlled to be opened, and the second control valve, the third control valve and the fourth control valve are controlled to be closed;

[0026] The frost suppression mode: the fourth control valve is controlled to be opened, and the first control valve, the second control valve and the third control valve are controlled to be closed;

[0027] The dust removal mode: the first control valve, the second control valve, the third control valve and the fourth control valve are controlled to be closed.

[0028] As an optional embodiment of the present application, according to the actual running frequency and the frosting fan running frequency, the running mode of the heat storage defrosting system is determined, wherein the running mode is a defrosting mode, a frost suppression mode and a dust removal mode, comprising:

[0029] comparing the actual operation frequency with a frosting fan operation frequency;

[0030] if the actual operation frequency is greater than the frosting fan operation frequency, comparing an actual fin temperature of the fin heat exchanger with a preset fin temperature;

[0031] if the actual fin temperature is less than the preset fin temperature, determining that the heat storage defrosting system enters a defrosting mode;

[0032] if the actual fin temperature is greater than or equal to the preset fin temperature, determining that the heat storage defrosting system enters a dust removal mode.

[0033] As an optional embodiment of the present application, the determination of the operation mode of the heat storage defrosting system according to the actual operation frequency and the frosting fan operation frequency, wherein the operation mode is the defrosting mode, the frost suppression mode and the dust removal mode, comprises:

[0034] comparing the actual operation frequency with a frosting fan operation frequency;

[0035] if the actual operation frequency is less than or equal to the frosting fan operation frequency, comparing an ambient temperature of an outdoor unit installation with a frost suppression set temperature;

[0036] if the ambient temperature is less than the frost suppression set temperature, determining that the heat storage defrosting system enters a frost suppression mode.

[0037] As an optional embodiment of the present application, if the ambient temperature is greater than or equal to the frost suppression set temperature, determining that the heat storage defrosting system enters a hot water heating mode.

[0038] As an optional embodiment of the present application, the control method of the heat storage defrosting system further comprises:

[0039] in a refrigeration mode of an air conditioner, obtaining an actual operation frequency of a fan;

[0040] determining whether the heat storage defrosting system enters a dust removal mode according to the actual operation frequency and a frosting fan operation frequency.

[0041] As an optional embodiment of the present application, the determination of whether the heat storage defrosting system enters the dust removal mode according to the actual operation frequency and the frosting fan operation frequency comprises:

[0042] comparing the actual operation frequency with a frosting fan operation frequency;

[0043] if the actual operation frequency is greater than the frosting fan operation frequency, determining that the heat storage defrosting system enters a dust removal mode.

[0044] As the optional implementation of the present application, if the actual operation frequency is less than or equal to the frosting fan operation frequency, it is determined that the heat storage defrosting system enters the hot water heating mode.

[0045] As the optional implementation of the present application, in the heating mode of the air conditioner, when the hot water heating mode is executed, the second control valve is controlled to be opened, and the first control valve, the third control valve and the fourth control valve are controlled to be closed.

[0046] In the cooling mode of the air conditioner, when the hot water heating mode is executed, the second control valve and the third control valve are controlled to be opened, and the first control valve and the fourth control valve are controlled to be closed.

[0047] The heat storage defrosting system provided by the present application comprises a heat storage module, a defrosting module and a refrigerant circulation module. The heat storage module is arranged outside the compressor motor in the refrigerant circulation module. The phase change heat storage principle is used to recover waste heat of the unit. The defrosting module is arranged around the fin heat exchanger in the refrigerant circulation module. When the unit needs to be defrosted or other operations, the heat carrier in the heat exchange pipeline in the heat storage module can absorb the heat generated by the compressor motor and be transported to the defrosting module. The heat carrier is sprayed towards the fin heat exchanger through the defrosting module. The defrosting operation can be performed through the separately arranged defrosting module without stopping the heating cycle. The user's discomfort caused by stopping heating during defrosting is solved. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0049] Figure 1 It is a schematic diagram of the principle structure of the heat storage defrosting system provided by the present application;

[0050] Figure 2 It is a flowchart of the control method (in the heating mode) of the heat storage defrosting system provided by the present application;

[0051] Figure 3 It is a flowchart of the control method (in the cooling mode) of the heat storage defrosting system provided by the present application;

[0052] Figure 4 It is a flowchart of a specific control process of the air conditioner heating system cycle provided by the present application;

[0053] Figure 5is a flowchart of a specific control process of the air conditioning refrigeration system cycle provided by the embodiment of the present application.

[0054] In the figure: 1, compressor; 2, oil separator; 3, fin heat exchanger; 4, auxiliary branch; 5, drying filter; 6, expansion valve; 7, shell and tube heat exchanger; 8, compressor motor; 9, heat exchange part; 10, spraying part; 11, heat storage part; 12, heat exchange pipeline; 13, heat storage tank; 14, electric auxiliary heating part; 15, first control valve; 16, second control valve; 17, third control valve; 18, fourth control valve. DETAILED DESCRIPTION

[0055] In order to make the object, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0056] Referring to Figure 1 The present application provides a heat storage defrosting system, comprising a heat storage module, a defrosting module and a refrigerant circulation module, wherein the heat storage module is arranged around the compressor motor 8 in the refrigerant circulation module, the defrosting module is arranged around the fin heat exchanger 3 in the refrigerant circulation module, and the heat storage agent in the heat exchange pipeline 12 in the heat storage module can absorb the heat generated by the compressor motor 8 and be transported to the defrosting module to spray the heat storage agent towards the fin heat exchanger 3 through the defrosting module.

[0057] The heat storage defrosting system in the above scheme recovers waste heat of the unit by using the phase change heat storage principle, the defrosting module is arranged around the fin heat exchanger 3 in the refrigerant circulation module, when the unit needs defrosting or other operations during operation of the unit, the heat storage agent in the heat exchange pipeline 12 in the heat storage module can absorb the heat generated by the compressor motor 8 and be transported to the defrosting module to spray the heat storage agent towards the fin heat exchanger 3 through the defrosting module, without stopping the heating cycle, defrosting operation can be performed through the separately arranged defrosting module. The problem of user discomfort caused by stopping heating during defrosting is solved.

[0058] The heat storage module in the embodiment comprises a heat storage part 11, a heat exchange pipeline 12 and a heat storage material, a heat storage cavity is formed in the heat storage part 11, the heat exchange pipeline 12 and the heat storage material are arranged in the heat storage cavity, and the heat storage material is arranged outside the heat exchange pipeline 12. The heat exchange pipeline 12 is arranged around the compressor motor 8, and the heat exchange pipeline 12 has an inlet end and an outlet end, and the outlet end of the heat exchange pipeline 12 can pass out of the heat storage cavity and be connected with the defrosting module.

[0059] It should be noted that the heat transfer medium includes, but is not limited to, materials such as water, which are present in the heat exchange pipeline 12 and can enter the defrosting module; the heat storage material is a phase change material, which is always inside the heat storage cavity, and this phase change material includes, but is not limited to, paraffin wax.

[0060] The defrosting module includes a heat exchange section 9 and a spray section 10. The heat exchange piping 12 is connected to the heat exchange section 9, and the spray section 10 is mounted on the heat exchange section 9 with its spray outlet facing the finned heat exchanger 3. The heat exchange section 9 is the heat exchange piping, and the spray section 10 is the spray head, which has multiple water spray holes facing the finned heat exchanger 3. The spray head is equipped with a solenoid valve to control its opening and closing.

[0061] Considering that when frost is severe, the heat transfer fluid in the heat exchange pipe 12 may not be able to effectively remove the frost from the surface of the finned heat exchanger 3, as an optional implementation method in this embodiment, the heat storage defrosting system also includes a heat storage module. The heat storage module is connected to the heat exchange pipe 12 placed outside the heat storage chamber. The liquid in the heat storage module can mix with the heat transfer fluid in the heat exchange pipe 12 and then flow to the heat exchange section 9.

[0062] Optionally, a first control valve 15 is provided on the connecting pipe between the heat storage module and the heat exchange pipe 12 located outside the heat storage chamber.

[0063] In this embodiment, the heat storage module is also connected to the heat exchange pipeline 12, and a second control valve 16 is provided on the connecting pipeline between the heat storage module and the heat exchange pipeline 12. The amount of heat transfer fluid entering the heat storage module from the heat exchange pipeline 12 can be controlled by the second control valve 16.

[0064] like Figure 1 As shown, the heat storage module includes a heat storage tank 13 and an electric auxiliary heating unit 14 disposed inside the heat storage tank 13. The liquid outlet of the heat storage tank 13 is connected to the heat exchange pipeline 12 located outside the heat storage chamber and the user side, respectively. The liquid inlet of the heat storage tank 13 is connected to the heat exchange pipeline 12 located outside the heat storage chamber and the heat exchange unit 9, respectively.

[0065] After the temperature of the heat transfer medium inside the heat exchange pipeline 12 rises, it can enter the heat storage tank 13 through the second control valve 16, and together with the electric auxiliary heating unit 14 inside, produce domestic hot water and deliver it to the user's pipeline.

[0066] The heat exchange section 9 is connected to the liquid inlet of the heat storage tank 13, and a third control valve 17 is installed on the connecting pipeline between the heat exchange section 9 and the heat storage module. The heat transfer fluid in the heat exchange pipeline 12 can flow into the heat storage module after heat exchange through the heat exchange section 9.

[0067] The heat exchange part 9 and the inlet of the heat exchange pipeline 12 are further provided with an auxiliary branch 4, the fourth control valve 18 is arranged on the auxiliary branch 4, and the heat carrier in the heat exchange pipeline 12 flows back into the heat exchange pipeline 12 through the auxiliary branch 4 after heat exchange with the finned heat exchanger 3 through the heat exchange part 9.

[0068] The refrigerant circulation module comprises a compressor 1, an oil separator 2, a finned heat exchanger 3, a dry filter 5, an expansion valve 6, a shell-and-tube heat exchanger 7 and a suction port of the compressor 1 connected in sequence along the direction of the exhaust port of the compressor 1 to form a loop, and a compressor motor 8 electrically connected with the compressor 1.

[0069] When the compressor 1 operates, the compressor motor 8 generates heat which can be absorbed by the heat exchange pipeline 12 and transferred to the heat exchange part 9 in the defrosting module and the heat storage tank 13, and the excess heat is absorbed by the heat storage material in the heat storage module and stored, and the internal solid phase change material (including but not limited to paraffin) changes into liquid. The heat storage module serves as the main heat source of the heat carrier and inputs stable heat for the heat carrier, which is used for defrosting or combined with the electric auxiliary heating part 14 to produce domestic hot water.

[0070] In addition, considering that the fins of the unit will be dirty and blocked when the unit is in a poor environment, after the fins are blocked, the heat exchange effect is poor, and the fan operating frequency is large, which not only affects the heating effect of the unit, but also affects the stable operation of the unit. The heat storage defrosting system in the embodiment can play a dust removal role by spraying the heat carrier on the fins through the heat exchange pipeline 12, the defrosting module and the spraying part 10 after pressurization.

[0071] When the unit operates, the phase change heat storage principle is used for waste heat recovery of the unit, the electric auxiliary heating part 14 is used for producing domestic hot water, the defrosting, defrosting and dust removal cycles can be separately set, the domestic hot water system is combined, the defrosting, defrosting and dust removal operations can be performed without stopping the heating cycle. Moreover, domestic hot water can be prepared during the refrigeration and heating processes of the unit.

[0072] In order to more clearly illustrate the circulation regulation of the heat storage defrosting system in the technical scheme of the application, the circulation pipeline regulation in the heat storage defrosting system is defined as the following multiple working modes in the form of embodiments and is illustrated as follows:

[0073] The defrosting mode: the first control valve 15 is opened, and the second control valve 16, the third control valve 17 and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is increased, is mixed with domestic hot water after passing through the first control valve 15, and is then transported into the heat exchange part 9 of the defrosting module, and then is sprayed on the fins of the finned heat exchanger 3 after pressurization through the spraying part 10 to perform defrosting operation.

[0074] Anti-frost mode: control the fourth control valve 18 to open, and the first control valve 15, the second control valve 16 and the third control valve 17 to close; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is raised, enters the heat exchange part 9 of the defrosting module, exchanges heat with the fin heat exchanger 3 with lower temperature in the heat exchange part 9, reaches the purpose of anti-frost, and then the temperature of the heat carrier is lowered, re-enters the heat exchange pipeline 12 in the heat storage module through the fourth control valve 18 and the water pump arranged on the auxiliary branch 4; it needs to be explained that in the anti-frost mode, the spraying part 10 is closed, and the heat carrier in the heat exchange part 9 cannot be sprayed out. Figure 1

[0075] Dust removal mode: control the first control valve 15, the second control valve 16, the third control valve 17 and the fourth control valve 18 to close; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, is transported to the heat exchange part 9 of the defrosting module, then is sprayed on the fin of the fin heat exchanger 3 after being pressurized through the spraying part 10, and dust removal operation is carried out.

[0076] Heating water mode: in the heating mode of the air conditioner, control the second control valve 16 to open, and the first control valve 15, the third control valve 17 and the fourth control valve 18 to close; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is raised, enters the heat storage tank 13 through the second control valve 16, and joint heat storage tank 13 inside the electric auxiliary heating part 14 to prepare domestic hot water.

[0077] In the cooling mode of the air conditioner, control the second control valve 16 and the third control valve 17 to open, and the first control valve 15 and the fourth control valve 18 to close; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is raised, part of the heat carrier enters the heat exchange part 9, part of the heat carrier directly enters the heat storage tank 13 through the second control valve 16, the heat carrier in the heat exchange part 9 exchanges heat with the fin heat exchanger 3, the temperature is further raised, then the heat carrier enters the heat storage tank 13 through the third control valve 17, enters the heat storage tank 13 through the second control valve 16, and joint heat storage tank 13 inside the electric auxiliary heating part 14 to prepare domestic hot water.

[0078] The application also provides an air conditioner comprising the heat storage defrosting system.

[0079] In the air conditioner in the embodiment, waste heat recovery is carried out on the unit by using the phase change heat storage principle, joint use of the electric auxiliary heating part 14 is used to prepare domestic hot water, defrosting, anti-frost and dust removal cycles can be set up separately, joint use of the domestic hot water system can be used, anti-frost, defrosting and dust removal operations can be carried out without stopping the heating cycle. And domestic hot water can be prepared in the air conditioner cooling or heating process.

[0080] Based on a general inventive concept, the application also provides a control method of the heat storage defrosting system. ​

[0081] Figure 2 and Figure 3 is a flowchart provided by an embodiment of the control method of the heat storage defrosting system, refer to Figure 2 The control method of the heat storage defrosting system can be applied to any of the above-mentioned embodiments of the heat storage defrosting system and can include the following steps:

[0082] S31, in the heating mode of the air conditioner, the actual running frequency of the fan is obtained, where the fan refers to the outdoor fan located above the fin heat exchanger 3;

[0083] S32, according to the actual running frequency and the frosting fan running frequency, the running mode of the heat storage defrosting system is determined, wherein the running mode is the defrosting mode, the frost suppression mode and the dust removal mode.

[0084] The heat storage defrosting system includes a heat storage module, a defrosting module, a refrigerant circulation module and a heat storage module. The heat storage module is connected to the liquid inlet of the defrosting module and the heat storage module, respectively. The liquid outlet of the heat storage module is connected to the heat exchange pipeline 12 and the connecting pipeline between them is provided with a first control valve 15. The connecting pipeline between the heat exchange pipeline 12 and the liquid inlet of the heat storage module is provided with a second control valve 16. The liquid inlet of the defrosting module and the heat storage module is connected and the connecting pipeline between them is provided with a third control valve 17. The defrosting module and the inlet of the heat exchange pipeline 12 of the heat storage module are provided with an auxiliary branch 4 and the auxiliary branch 4 is provided with a fourth control valve 18.

[0085] Optionally, the running mode is respectively:

[0086] Defrosting mode: control the first control valve 15 to open, and the second control valve 16, the third control valve 17 and the fourth control valve 18 are closed;

[0087] Frost suppression mode: control the fourth control valve 18 to open, and the first control valve 15, the second control valve 16 and the third control valve 17 are closed;

[0088] Dust removal mode: control the first control valve 15, the second control valve 16, the third control valve 17 and the fourth control valve 18 to be closed.

[0089] Optionally, according to the actual running frequency and the frosting fan running frequency, the running mode of the heat storage defrosting system is determined, wherein the running mode is the defrosting mode, the frost suppression mode and the dust removal mode, including:

[0090] Compare the actual running frequency with the frosting fan running frequency;

[0091] In the case that the actual operation frequency is greater than the frosting fan operation frequency, the actual fin temperature of the fin heat exchanger 3 is continuously compared with the preset fin temperature, and a temperature sensor is arranged on the fin heat exchanger 3 to detect the actual fin temperature.

[0092] If the actual fin temperature is less than the preset fin temperature, it is determined that the heat storage defrosting system enters the defrosting mode.

[0093] If the actual fin temperature is greater than or equal to the preset fin temperature, it is determined that the heat storage defrosting system enters the dust removal mode.

[0094] In the case that the actual operation frequency is less than or equal to the frosting fan operation frequency, the ambient temperature of the outdoor unit installation is continuously compared with the frost suppression setting temperature.

[0095] If the ambient temperature is less than the frost suppression setting temperature, it is determined that the heat storage defrosting system enters the frost suppression mode.

[0096] If the ambient temperature is greater than or equal to the frost suppression setting temperature, it is determined that the heat storage defrosting system enters the hot water heating mode; it should be noted that in the heating mode of the air conditioner, when the hot water heating mode is executed, the second control valve 16 is opened, and the first control valve 15, the third control valve 17 and the fourth control valve 18 are closed.

[0097] In addition, the control method of the heat storage defrosting system provided by the embodiment further comprises:

[0098] S41, in the cooling mode of the air conditioner, the actual operation frequency of the fan is obtained.

[0099] S42, according to the actual operation frequency and the frosting fan operation frequency, it is determined whether the heat storage defrosting system enters the dust removal mode.

[0100] Optionally, according to the actual operation frequency and the frosting fan operation frequency, it is determined whether the heat storage defrosting system enters the dust removal mode, comprising:

[0101] Comparing the actual operation frequency with the frosting fan operation frequency;

[0102] If the actual operation frequency is greater than the frosting fan operation frequency, it is determined that the heat storage defrosting system enters the dust removal mode;

[0103] If the actual operation frequency is less than or equal to the frosting fan operation frequency, it is determined that the heat storage defrosting system enters the hot water heating mode; it should be noted that in the cooling mode of the air conditioner, when the hot water heating mode is executed, the second control valve 16 and the third control valve 17 are opened, and the first control valve 15 and the fourth control valve 18 are closed.

[0104] As shown in the specific control process for circulating the air conditioner heating system. Figure 4

[0105] ​After the heating cycle runs t1, the fin temperature T3, the ambient temperature Ts (the ambient temperature Ts is the actual installation environment temperature of the outdoor unit), and the actual running frequency H1 of the fan are detected, and the frosting fan running frequency H is compared with the actual running frequency H1 of the fan to determine whether the defrosting (dusting) cycle is needed, as follows.

[0106] The actual running frequency H1 of the fan ≤ the frosting fan running frequency H:

[0107] (1) The ambient temperature Ts ≥ the frost suppression set temperature Ty1, and the domestic hot water production cycle (hot water production mode) is started:

[0108] The second control valve 16 is opened, and the first control valve 15, the third control valve 17, and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is raised, enters the heat storage tank 13 through the second control valve 16, and the domestic hot water is produced in combination with the electric auxiliary heating part 14 inside the heat storage tank 13.

[0109] (2) The ambient temperature Ts < the frost suppression set temperature Ty1, and the frost suppression cycle (frost suppression mode) is started:

[0110] The fourth control valve 18 is opened, and the first control valve 15, the second control valve 16, and the third control valve 17 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is raised, enters the heat exchange part 9 of the defrosting module, and exchanges heat with the fin heat exchanger 3 with a lower temperature in the heat exchange part 9 to achieve the purpose of frost suppression, and then the heat carrier temperature is lowered, re-enters the heat exchange pipeline 12 in the heat storage module through the fourth control valve 18 and the water pump arranged on the auxiliary branch 4; it should be noted that the spray part 10 is closed in this frost suppression mode, and the heat carrier in the heat exchange part 9 cannot be sprayed out. Figure 1

[0111] The actual running frequency H1 of the fan > the frosting fan running frequency H:

[0112] (1) The fin actual temperature T3 ≥ the fin preset temperature T, and the dust removal cycle (dust removal mode) is started:

[0113] The first control valve 15, the second control valve 16, the third control valve 17, and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, is transported to the heat exchange part 9 of the defrosting module, and then is sprayed on the fins of the fin heat exchanger 3 after being pressurized by the spray part 10 to perform dust removal operation.

[0114] (2) The fin actual temperature T3 < the fin preset temperature T, and the defrosting cycle (defrosting mode) is started:

[0115] ​The first control valve 15 is opened, and the second control valve 16, the third control valve 17 and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is increased, and the domestic hot water is mixed after passing through the first control valve 15, and then is transported into the heat exchange part 9 of the defrosting module, and then is sprayed on the fins of the fin heat exchanger 3 after being pressurized by the spraying part 10, so that the defrosting operation is performed

[0116] As shown in the figure, it is a specific control process for the air conditioning refrigeration system cycle. Figure 5

[0117] After the refrigeration cycle runs for t1, the actual running frequency H1 of the fan is detected, and the actual running frequency H1 of the fan is compared with the frosting fan running frequency H to determine whether the dust removal cycle is needed.

[0118] The actual frequency H1 of the fan is less than or equal to the frosting fan running frequency H, and the domestic hot water preparation cycle (hot water preparation mode) is started:

[0119] The second control valve 16 and the third control valve 17 are opened, and the first control valve 15 and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, the temperature is increased, part of the heat carrier enters the heat exchange part 9, and part of the heat carrier directly enters the heat storage tank 13 through the second control valve 16; after the heat carrier in the heat exchange part 9 exchanges heat with the fin heat exchanger 3, the temperature is further increased, and then the heat carrier enters the heat storage tank 13 through the third control valve 17 and enters the heat storage tank 13 through the second control valve 16, and the domestic hot water is prepared in combination with the electric auxiliary heating part 14 in the heat storage tank 13.

[0120] The actual frequency H1 of the fan is greater than the frosting fan running frequency H, and the dust removal cycle (dust removal mode) is started:

[0121] The first control valve 15, the second control valve 16, the third control valve 17 and the fourth control valve 18 are closed; the heat carrier passes through the heat exchange pipeline 12 in the heat storage module, and is transported into the heat exchange part 9 of the defrosting module, and then is sprayed on the fins of the fin heat exchanger 3 after being pressurized by the spraying part 10, so that the dust removal operation is performed.

[0122] When the unit detects that the frost suppression, defrosting or dust removal operation is needed, the dust removal, frost suppression and dust removal cycles are set separately, and the domestic hot water preparation system (heat storage module) is combined, so that the above operations can be performed without stopping the heating cycle.

[0123] When the unit does not need to perform the frost suppression, defrosting or dust removal operation, the waste heat of the unit is recovered by using the phase change heat storage principle, and the constant temperature domestic hot water is prepared in combination with the electric auxiliary heating part 14.

[0124] ​It can be understood that the same or similar parts in the above embodiments can be mutually referenced, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0125] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A thermal storage defrost system characterized by, The heat storage module is arranged outside the compressor motor in the refrigerant circulation module, the defrosting module is arranged around the fin heat exchanger in the refrigerant circulation module, the heat carrier in the heat exchange pipeline in the heat storage module can absorb the heat generated by the compressor motor and is transported to the defrosting module, so that the heat carrier is sprayed towards the fin heat exchanger through the defrosting module; The heat storage module comprises a heat storage part, a heat exchange pipeline and heat storage material, the heat storage cavity is formed in the heat storage part, the heat exchange pipeline and the heat storage material are arranged in the heat storage cavity, and the heat storage material is arranged outside the heat exchange pipeline; the outlet end of the heat exchange pipeline can pass through the heat storage cavity and is connected with the defrosting module in communication; The defrosting module comprises a heat exchange part and a spraying part, the heat exchange pipeline is connected with the heat exchange part, the spraying part is installed on the heat exchange part, and the spray outlet of the spraying part faces the fin heat exchanger; An auxiliary branch is arranged between the heat exchange part and the inlet of the heat exchange pipeline, a fourth control valve is arranged on the auxiliary branch, and the heat carrier in the heat exchange pipeline flows back to the heat exchange pipeline through the auxiliary branch after heat exchange between the heat exchange part and the fin heat exchanger; The heat storage defrosting system further comprises a heat storage module, the heat storage module is connected with the heat exchange pipeline arranged outside the heat storage cavity in communication, and the liquid in the heat storage module mixes with the heat carrier in the heat exchange pipeline and then flows to the heat exchange part.

2. The thermal storage defrost system of claim 1, wherein, A first control valve is arranged on the connecting pipeline between the heat storage module and the heat exchange pipeline arranged outside the heat storage cavity.

3. The thermal storage defrost system of claim 2, wherein, The heat storage module is connected with the heat exchange pipeline in communication, a second control valve is arranged on the connecting pipeline between the heat storage module and the heat exchange pipeline, and the amount of heat carrier flowing into the heat storage module from the heat exchange pipeline can be controlled through the second control valve.

4. The thermal storage defrost system of claim 2, wherein, The heat exchange part is connected with the heat storage module in communication, a third control valve is arranged on the connecting pipeline between the heat exchange part and the heat storage module, and the heat carrier in the heat exchange pipeline can flow into the heat storage module after heat exchange through the heat exchange part.

5. The thermal storage defrost system of claim 4, wherein, The heat storage module comprises a heat storage tank and an electric auxiliary heating part arranged inside the heat storage tank, the liquid outlet of the heat storage tank is connected with the heat exchange pipeline arranged outside the heat storage cavity and the user side in communication respectively, and the liquid inlet of the heat storage tank is connected with the heat exchange pipeline arranged outside the heat storage cavity and the heat exchange part in communication respectively.

6. The thermal storage defrost system of claim 5, wherein, The refrigerant circulation module comprises a compressor, an oil separator, a fin heat exchanger, a dry filter, an expansion valve, a shell-and-tube heat exchanger and a suction port of the compressor are connected in sequence along the direction of the exhaust port of the compressor to form a loop, and the compressor motor is electrically connected with the compressor.

7. The thermal storage defrost system of claim 1, wherein, The heat storage defrosting system comprises the heat storage defrosting system according to any one of claims 1-7.

8. An air conditioner characterized by comprising: ​ 9. A control method of a heat storage defrosting system, characterized by, The heat storage defrosting system of any one of claims 1-7, characterized in that it comprises: In the heating mode of the air conditioner, the actual operating frequency of the fan is obtained; According to the actual operating frequency and the frosting fan operating frequency, the operating mode of the heat storage defrosting system is determined, wherein the operating mode is the defrosting mode, the frost suppression mode and the dust removal mode.

10. The control method of the thermal energy storage defrosting system according to claim 9, characterized by, The heat storage defrosting system comprises a heat storage module, a defrosting module, a refrigerant circulation module and a heat storage module, the heat exchange pipeline of the heat storage module is connected with the liquid inlet of the defrosting module and the heat storage module respectively, the liquid outlet of the heat storage module is connected with the heat exchange pipeline and a connecting pipeline between them is provided with a first control valve, a connecting pipeline between the heat exchange pipeline and the liquid inlet of the heat storage module is provided with a second control valve, the liquid inlet of the defrosting module is connected with the heat storage module and a connecting pipeline between them is provided with a third control valve, an auxiliary branch is provided between the defrosting module and the inlet of the heat exchange pipeline of the heat storage module and the auxiliary branch is provided with a fourth control valve.

11. The control method of the thermal energy storage defrosting system according to claim 10, characterized by, The operating mode is respectively: Defrosting mode: control the first control valve to open, and the second control valve, the third control valve and the fourth control valve to close; Frost suppression mode: control the fourth control valve to open, and the first control valve, the second control valve and the third control valve to close; Dust removal mode: control the first control valve, the second control valve, the third control valve and the fourth control valve to close.

12. The control method of the thermal energy storage defrosting system according to claim 11, characterized in that, According to the actual operating frequency and the frosting fan operating frequency, the operating mode of the heat storage defrosting system is determined, wherein the operating mode is the defrosting mode, the frost suppression mode and the dust removal mode, comprising: Compare the actual operating frequency with the frosting fan operating frequency; If the actual operating frequency is greater than the frosting fan operating frequency, compare the actual fin temperature with the preset fin temperature; If the actual fin temperature is less than the preset fin temperature, it is determined that the heat storage defrosting system enters the defrosting mode; If the actual fin temperature is greater than or equal to the preset fin temperature, it is determined that the heat storage defrosting system enters the dust removal mode.

13. The control method of the thermal energy storage defrosting system according to claim 11, wherein According to the actual operating frequency and the frosting fan operating frequency, the operating mode of the heat storage defrosting system is determined, wherein the operating mode is the defrosting mode, the frost suppression mode and the dust removal mode, comprising: Compare the actual operating frequency with the frosting fan operating frequency; If the actual operating frequency is less than or equal to the frosting fan operating frequency, compare the ambient temperature of the outdoor unit installation with the frost suppression set temperature; If the ambient temperature is less than the frost suppression set temperature, it is determined that the heat storage defrosting system enters the frost suppression mode.

14. The control method of the thermal energy storage defrosting system according to claim 13, characterized by, If the ambient temperature is greater than or equal to the frost suppression set temperature, it is determined that the heat storage defrosting system enters the heating water mode.

15. The control method of the thermal energy storage defrosting system according to claim 9, characterized by, The control method of the heat storage defrosting system further comprises: In the heating mode of the air conditioner, the actual operating frequency of the fan is obtained; According to the actual operating frequency and the frosting fan operating frequency, it is determined whether the heat storage defrosting system enters the dust removal mode.

16. The control method of the thermal energy storage defrosting system according to claim 15, characterized in that, The method comprises the following steps: comparing the actual operation frequency with the frosting fan operation frequency; if the actual operation frequency is greater than the frosting fan operation frequency, determining that the heat storage defrosting system enters the dust removal mode.

17. The control method of the heat storage defrosting system according to claim 16, wherein if the actual operation frequency is less than or equal to the frosting fan operation frequency, determining that the heat storage defrosting system enters the hot water production mode.

18. The control method of the thermal energy storage defrosting system according to claim 10, wherein, in the heating mode of the air conditioner, when the hot water production mode is executed, the second control valve is controlled to be opened, and the first control valve, the third control valve and the fourth control valve are controlled to be closed; in the cooling mode of the air conditioner, when the hot water production mode is executed, the second control valve and the third control valve are controlled to be opened, and the first control valve and the fourth control valve are controlled to be closed.

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