Heating and ventilation equipment and heating and ventilation equipment control method

Abstract

The invention discloses heating and ventilation equipment and a heating and ventilation equipment control method.The heating and ventilation equipment comprises a shell, a compressor assembly and a heat exchange assembly, the shell is provided with a first space, a second space and an air duct, the first space is used for communicating with the outdoor, and the air duct and the first space are not communicated and are used for communicating with the indoor; the second space is arranged in the air duct and does not communicate with the air duct, the compressor assembly is arranged in the first space, the heat exchange assembly is arranged in the air duct and comprises a heat exchange pipe, one side of the heat exchange pipe communicates with the compressor assembly, and the other side, away from the side, of the heat exchange pipe is provided with at least one bending area; the at least one bending area is arranged in the second space. The bent position of the heat exchange pipe of the heat exchange assembly is prone to leakage of refrigerants, the bent position of the heat exchange pipe is arranged in the second space, isolation of the refrigerants leaked from the heat exchange pipe is achieved, on the basis of improving use safety, installation of a refrigerant sensor is reduced, and the manufacturing cost of the heating and ventilation equipment is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of HVAC equipment, and in particular relates to HVAC equipment and a HVAC equipment control method. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Existing HVAC equipment generally includes a compressor assembly and an indoor heat exchange pipe. The refrigerant circulates between the compressor assembly and the indoor heat exchange pipe, and improves the indoor temperature through heat exchange between the indoor heat exchange pipe and the indoor air.

[0004] Indoor heat exchange tubes have bending areas, where refrigerant leakage is likely to occur, especially leakage of flammable refrigerants (such as R454B refrigerants, etc.), which increases safety risks during user use. In the prior art, refrigerant sensors are installed to detect leaked refrigerants to improve user safety during use. However, the installation cost of refrigerant sensors is high, which increases the manufacturing cost of HVAC equipment. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem of how to reduce the manufacturing cost of HVAC equipment. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a HVAC device, the HVAC device comprising:

[0007] A housing, the housing having a first space, a second space and an air duct, the first space being used to communicate with the outdoors, the air duct being disconnected from the first space and being used to communicate with the indoors, and the second space being arranged in the air duct and being disconnected from the air duct;

[0008] a compressor assembly, the compressor assembly being disposed in the first space;

[0009] A heat exchange component is arranged in the air duct, the heat exchange component includes a heat exchange tube, one side of the heat exchange tube is connected to the compressor assembly, and the other side of the heat exchange tube away from the one side is provided with at least one bending area, and the at least one bending area is arranged in the second space.

[0010] According to the HVAC equipment of the present invention, indoor air can enter the air duct and perform heat exchange with the heat exchange component, and after heat exchange in the air duct, it returns to the room again, thereby increasing the indoor temperature. The bending position of the heat exchange tube of the heat exchange component is prone to refrigerant leakage. The bending position of the heat exchange tube is set in the second space, and the second space is not connected to the air duct. When the heat exchange tube leaks refrigerant at the bending position, the leaked refrigerant cannot enter the room through the air duct, thereby improving the safety of the user during use. Based on the setting of the second space that is not connected to the air duct, the isolation of the refrigerant leaked from the heat exchange tube is achieved. On the basis of improving the safety of use, the installation of the refrigerant sensor is reduced, thereby reducing the manufacturing cost of the HVAC equipment.

[0011] In addition, the HVAC equipment according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the housing comprises:

[0013] A shell body, wherein the shell body has a receiving space;

[0014] a first partition plate, which is disposed in the receiving space and cooperates with the shell body to separate the first space and the air duct in the receiving space;

[0015] A second partition is disposed in the air duct and cooperates with the shell body to separate the second space in the air duct.

[0016] In some embodiments of the present invention, the first partition plate is connected to the inner wall of the shell body by bonding, screw connection, clamping, riveting or welding;

[0017] And / or, the second partition plate is connected to the inner wall of the shell body by bonding, screw connection, clamping, riveting or welding.

[0018] In some embodiments of the present invention, the first partition is an integrated structure;

[0019] And / or, the second partition is an integrated structure.

[0020] In some embodiments of the present invention, the second separator comprises:

[0021] A first plate body, wherein a through hole is formed on the first plate body, and the heat exchange tube is passed through the through hole;

[0022] a second plate body, the second plate body being connected to the first plate body and being located on one side of the first plate body;

[0023] A third plate body, the third plate body is connected to the first plate body, and the third plate body and the second plate body are located on the same side of the first plate body, and the first plate body, the second plate body and the third plate body are respectively connected to the inner wall of the shell body to enclose the second space.

[0024] In some embodiments of the present invention, the heat exchange tube is sealedly connected to the penetration hole.

[0025] In some embodiments of the present invention, an air inlet and an air outlet are respectively provided on the shell, one end of the air duct is connected to the indoor room through the air inlet, and the other end of the air duct is connected to the indoor room through the air outlet, and the heat exchange component is arranged between the air inlet and the air outlet, and the heat exchange component covers the entire flow cross-section of the air duct.

[0026] In some embodiments of the present invention, the flow cross-section of the air duct is narrowed along the direction from the air inlet to the heat exchange component.

[0027] In some embodiments of the present invention, at least one communication hole is formed on the shell, and the second space is connected to the outdoors through the at least one communication hole.

[0028] In some embodiments of the present invention, the heat exchange assembly further includes fins, and the fins are mounted on the heat exchange tubes and are thermally connected to the heat exchange tubes.

[0029] In some embodiments of the present invention, the HVAC equipment further comprises a fan assembly, which is installed in the air duct and is used to provide a driving force for the air flow to circulate between the room and the air duct.

[0030] A second aspect of the present invention provides a HVAC equipment control method, which is implemented by the HVAC equipment as described above, and the HVAC equipment control method includes:

[0031] According to the HVAC equipment being in an operating state, obtaining the current pressure of the refrigerant;

[0032] According to the current ambient temperature, obtaining a preset pressure of the refrigerant at the current ambient temperature;

[0033] Calculating a pressure difference between the preset pressure and the current pressure;

[0034] Calculating the refrigerant leakage amount according to the pressure difference;

[0035] According to the refrigerant leakage amount being less than or equal to the first preset value, controlling the HVAC equipment to keep running;

[0036] According to the refrigerant leakage amount being greater than the first preset value and the refrigerant leakage amount being less than or equal to a second preset value, controlling the HVAC equipment to keep running and issuing a refrigerant leakage reminder, wherein the first preset value is less than the second preset value;

[0037] According to the refrigerant leakage amount being greater than the second preset value, the compressor assembly and the auxiliary heating assembly are controlled to stop running, and the fan assembly is controlled to run at the highest gear and issue a refrigerant leakage reminder.

[0038] According to the HVAC equipment control method of the present invention, the refrigerant leakage is calculated according to the pressure difference between the current pressure and the preset pressure during the operation of the HVAC equipment, and the HVAC equipment is controlled according to the comparison result between the refrigerant leakage and the first preset value and the second preset value, so as to improve the safety of the HVAC equipment. The HVAC equipment control method does not need to use a refrigerant sensor, thereby reducing the manufacturing cost of the HVAC equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 The structure diagram of the HVAC equipment according to the embodiment of the present invention is schematically shown;

[0041] Figure 2 for Figure 1 A partial structural diagram of the HVAC equipment shown in ;

[0042] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A of the structure shown;

[0043] Figure 4 for Figure 1 A partial structural diagram of the HVAC equipment shown in ;

[0044] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part B of the structure shown;

[0045] Figure 6 for Figure 2 A partial structural diagram of the HVAC equipment shown in ;

[0046] Figure 7 for Figure 6 An enlarged structural diagram of part C of the structure shown;

[0047] Figure 8The flowchart of the HVAC equipment control method according to the embodiment of the present invention is schematically shown.

[0048] The reference numerals are as follows:

[0049] 100. HVAC equipment;

[0050] 10. Shell;

[0051] 101. first space; 102. air duct; 103. second space;

[0052] 11. Shell body;

[0053] 111, air outlet; 112, connecting hole; 113, air inlet; 114, heat exchange hole;

[0054] 12. First baffle;

[0055] 13. Second partition;

[0056] 131, first plate body; 132, second plate body; 133, third body;

[0057] 20. Compressor components;

[0058] 30. Heat exchange components;

[0059] 31. heat exchange tube; 311. bending area.

[0060] 40. Fan assembly. DETAILED DESCRIPTION

[0061] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0062] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0063] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0064] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0065] like Figures 1 to 8 As shown, according to an embodiment of the present invention, a HVAC device 100 is provided. The HVAC device 100 includes a shell 10 , a heat exchange component 30 and a compressor component 20 .

[0066] Specifically, an air duct 102, a first space 101 and a second space 103 which are not connected to each other are arranged inside the housing 10. The outdoor is connected to the first space 101, the indoor is connected to the air duct 102, and the heat exchange assembly 30 is installed inside the air duct 102 and is used to perform heat exchange on the airflow passing through the air duct 102. The compressor assembly 20 is installed in the first space 101 and is connected to one side of the heat exchange tube 31 of the heat exchange assembly 30. The heat exchange tube 31 has at least one bending area 311 on the other side away from the connection with the compressor assembly 20. The end of the heat exchange tube 31 connected to the compressor assembly 20 is arranged away from the bending area 311, and the bending area 311 is arranged inside the second space 103.

[0067] In the present application, when the HVAC equipment 100 is running, the indoor air enters the air duct 102 and exchanges heat with the heat exchange assembly 30, and the air in the air duct 102 returns to the room again after heat exchange, so as to increase the indoor temperature. The bending position of the heat exchange tube 31 of the heat exchange assembly 30 is prone to refrigerant leakage. The bending position of the heat exchange tube 31 is set in the second space 103, and the second space 103 is not connected to the air duct 102. When the heat exchange tube 31 leaks refrigerant at the bending position, the leaked refrigerant cannot enter the room through the air duct 102, thereby improving the safety of the user during use. Based on the setting of the second space 103 that is not connected to the air duct 102, the refrigerant leaked from the heat exchange tube 31 is isolated, and on the basis of improving the safety of use, the installation of the refrigerant sensor is reduced, thereby reducing the manufacturing cost of the HVAC equipment 100.

[0068] It should be understood that the first space 101 and the air duct 102 are respectively formed inside the housing 10, and the two are not connected to each other, which means that the first space 101 and the air duct 102 are isolated and arranged, and the airflow in the first space 101 cannot enter the air duct 102, and the airflow in the air duct 102 cannot enter the first space 101. The compressor assembly 20 is installed in the first space 101. When the compressor assembly 20 leaks refrigerant, the refrigerant is discharged to the outside and will not enter the room through the air duct 102, thereby improving the safety of the user during use.

[0069] In addition, the second space 103 is arranged in the air duct 102. The second space 103 and the air duct 102 are not connected to each other, which means that the airflow in the second space 103 cannot enter the air duct 102, and the airflow in the air duct 102 cannot enter the second space 103. The bending area 311 of the heat exchange tube 31 is arranged in the second space 103. When the refrigerant leaks in the bending area 311 of the heat exchange tube 31, the leaked refrigerant cannot enter the room through the air duct 102, so that the safety of the user is effectively improved.

[0070] In addition, the heat exchange tube 31 in the heat exchange assembly 30 has a refrigerant inlet end and a refrigerant outlet end, wherein the refrigerant inlet end is connected to the refrigerant outlet pipe of the compressor assembly 20 (the connecting position is located in the first space 101, that is, the refrigerant inlet end passes through the side wall of the air duct 102 to enter the first space 101, and the position where the refrigerant inlet end passes through the air duct 102 is sealed (for example, welding, expansion or setting of sealing components, etc.)), and the refrigerant outlet end is connected to the refrigerant input pipe of the compressor assembly 20 (the connecting position is located in the first space 101, that is, the refrigerant inlet end passes through the side wall of the air duct 102 to enter the first space 101, and the position where the refrigerant inlet end passes through the air duct 102 is sealed (for example, welding, expansion or setting of sealing components, etc.)), It is arranged in the first space 101, that is, the refrigerant outflow end passes through the side wall of the air duct 102 to enter the first space 101, and the position where the refrigerant outflow end passes through the air duct 102 is sealed (for example, welding, expansion or setting of sealing components, etc.). When the compressor assembly 20 is running, the refrigerant enters the heat exchange tube 31 from the refrigerant inflow end of the heat exchange tube 31, and the refrigerant entering the heat exchange tube 31 exchanges heat with the airflow in the air duct 102 through the heat exchange tube 31, and the refrigerant after heat exchange flows out through the refrigerant outflow end.

[0071] Furthermore, the body of the heat exchange tube 31 between the refrigerant inlet end and the refrigerant outlet end is set as a coil structure (the coil structure is serpentine), and a bending area 311 is formed at the bending position, so that the overall volume of the heat exchange tube 31 can be reduced to improve the convenience of layout and installation of the heat exchange assembly 30. The refrigerant inlet end and the refrigerant outlet end are located on the same side of the coil structure, and there is a bending area 311 on the other side of the coil structure (the side of the heat exchange tube 31 away from the compressor assembly 20), and the number of the bending areas 311 is at least one. At the position of the bending area 311, the heat exchange tube 31 is prone to refrigerant leakage because the curvature radius of the heat exchange tube 31 does not meet the requirement of being greater than 2.5 times the diameter of the heat exchange tube 31. Therefore, the bending area 311 is a refrigerant leakage point of the heat exchange tube 31. In the present application, the bending area 311 is arranged to pass through the inner wall of the air duct 102 and is arranged in the second space 103 (the position where the bending area 311 passes through the air duct 102 is sealed (for example, welding, expansion or setting of sealing components, etc.)), so as to exclude the refrigerant leakage position of the heat exchange tube 31 from the air duct 102, reduce the situation where the leaked refrigerant enters the room, and thus improve the safety of users during use.

[0072] It should be noted that the number of the bending areas 311 of the heat exchange tube 31 can be one, two, three, four, five, six, seven, etc., and the number of the bending areas 311 can be set according to specific needs.

[0073] In addition, the shape of the bending area 311 may be U-shaped, W-shaped, V-shaped, etc. In the present application, the shape of the bending area 311 is U-shaped to reduce the possibility of damage to the bending area 311 and the leakage of the refrigerant.

[0074] In the present application, a heat exchange hole 114 is provided on the shell body 11, and the first space 101 is connected to the outdoors through the heat exchange hole 114. The compressor assembly 20 is arranged in the first space 101. The compressor assembly 20 is connected to the outside through the heat exchange hole 114 and can exchange heat with the outdoor space. When the HVAC equipment 100 is in the heating mode, the compression assembly absorbs heat from the outdoors and releases heat in the air duct 102 through the heat exchange assembly 30. When the HVAC equipment 100 is in the cooling mode, the compressor assembly 20 absorbs heat from the air duct 102 through the heat exchange assembly 30 and releases the absorbed heat to the outdoors.

[0075] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 4 as well as Figure 6 As shown, the housing 10 includes a first partition plate 12 , a second partition plate 13 and a shell body 11 .

[0076] Specifically, a receiving space is formed inside the shell body 11, and the first partition 12 and the second partition 13 are respectively arranged in the receiving space of the shell body 11, wherein the receiving space inside the shell 10 is divided into a first space 101 and an air duct 102 by the first partition 12, and the second partition 13 separates a second space 103 in the air duct 102.

[0077] The first partition plate 12 and the second partition plate 13 are used to separate the first space 101, the second space 103 and the air duct 102 in the receiving space of the shell body 11. The overall structure is simple and easy to implement, thereby effectively reducing the manufacturing cost.

[0078] It should be pointed out that in the present application, the shell body 11 is a rectangular structure, which includes a top plate, a bottom plate and multiple side panels. The top plate is arranged above the top plate, and the multiple side panels are respectively connected to the top plate and the bottom plate, so as to block the space between the top plate and the bottom plate, thereby enclosing a receiving space.

[0079] The first partition 12 is arranged in the receiving space, wherein the first partition 12 is respectively connected to the top plate, the bottom plate and the side panels, so as to separate a first space 101 and an air duct 102 that are not connected to each other in the receiving space, and the second partition 13 is arranged in the air duct 102, wherein the second partition 13 is respectively connected to the top plate, the bottom plate and the side panels, so as to separate a second space 103 that is not connected to the air duct 102 in the air duct 102.

[0080] In addition, in the present application, the shell body 11 can be a metal part or a non-metal part. When the shell body 11 is a metal part, such as a stainless steel part, it can be formed by stamping a stainless steel plate and then welding it. When the shell body 11 is a non-metal part, such as a plastic part, it can be integrally formed by injection molding.

[0081] The first partition 12 and the second partition 13 may be made of the same material or different materials. In the present application, the first partition 12 and the second partition 13 are made of the same material, and both are consistent with the material of the shell body 11, so that the materials can be unified, which is convenient for reducing the overall manufacturing cost of the shell 10.

[0082] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 4 as well as Figure 6 As shown, the first partition 12 is arranged in the receiving space of the shell body 11, and the inner wall of the shell body 11 is connected and fixed to the first partition 12, wherein the connection method between the inner wall of the shell body 11 and the first partition 12 includes but is not limited to welding, bonding, screw connection, clamping or riveting, etc.

[0083] By setting the connection method between the inner wall of the shell body 11 and the first partition 12, the connection strength between the first partition 12 and the shell body 11 can be effectively improved, and the first space 101 and the air duct 102 can be effectively separated, so as to achieve effective separation of the indoor side and the outdoor side of the HVAC equipment 100, thereby reducing the adverse effects of the outdoor side on the indoor side, and further improving the safety of users during use.

[0084] Exemplarily, the first partition 12 is connected to the inner wall of the shell body 11 by screws, wherein a flange structure is provided at the connection position between the first partition 12 and the inner wall of the shell body 11, the flange structure abuts against the inner wall of the shell body 11, and screws are screwed at the abutment position between the flange structure and the inner wall of the shell body 11. In addition, a sealing structure (such as a sealing gasket or a sealant, etc.) is provided between the flange structure and the inner wall of the shell body 11 to reduce the possibility of the first space 101 being connected to the air duct 102.

[0085] Exemplarily, the first partition 12 is welded to the inner wall of the shell body 11, wherein the first partition 12 is fully welded at the connection position between the inner wall of the shell body 11, and the first partition 12 is connected and fixed by welding and the strength of the connection position can be improved. The full welding method can improve the sealing of the connection position to reduce the possibility of the first space 101 being connected to the air duct 102.

[0086] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 4 as well as Figure 6As shown, the second partition 13 is arranged in the air duct 102, and the inner wall of the shell body 11 located in the air duct 102 is connected and fixed to the second partition 13, wherein the connection method between the inner wall of the shell body 11 and the second partition 13 includes but is not limited to welding, bonding, screw connection, clamping or riveting, etc.

[0087] By setting the connection mode between the inner wall of the shell body 11 and the second partition 13, the connection strength between the second partition 13 and the shell body 11 can be effectively improved, and the second space 103 and the air duct 102 can be effectively separated, so as to realize the effective separation of the heat exchange tube 31 at the leakage position (bending area 311) and the indoor side, thereby reducing the adverse effects of the refrigerant on the indoor side, and further improving the safety of users during use.

[0088] Exemplarily, the second partition 13 is connected to the inner wall of the shell body 11 by screws, wherein a flange structure is provided at the connection position between the second partition 13 and the inner wall of the shell body 11, the flange structure abuts against the inner wall of the shell body 11, and screws are screwed at the abutment position between the flange structure and the inner wall of the shell body 11. In addition, a sealing structure (such as a sealing gasket or a sealant, etc.) is provided between the flange structure and the inner wall of the shell body 11 to reduce the possibility of the second space 103 being connected to the air duct 102.

[0089] Exemplarily, the second partition 13 is welded to the inner wall of the shell body 11, wherein the second partition 13 is fully welded at the connection position with the inner wall of the shell body 11. The second partition 13 is connected and fixed by welding and the strength of the connection position can be improved. The full welding method can improve the sealing of the connection position to reduce the possibility of the second space 103 being connected to the air duct 102.

[0090] In some embodiments of the present invention, the first partition 12 is configured as an integrated structure. The first partition 12 of the integrated structure has a high overall structural strength, can effectively maintain the separation of the first space 101 and the air duct 102, and reduce the possibility of the first space 101 and the air duct 102 being connected, thereby further improving the safety of the user when using the HVAC equipment 100.

[0091] In addition, the first partition plate 12 having an integrated structure is easy to process and can effectively improve the processing efficiency, thereby effectively reducing the manufacturing cost.

[0092] In addition, in other embodiments of the present application, the first partition 12 may be a split structure, which is processed separately and then spliced ​​to form the second partition 13 .

[0093] It should be noted that the first partition 12 can be a metal part or a non-metal part. When the first partition 12 is a metal part, for example, the first partition 12 is a stainless steel part, and can be processed and manufactured by stamping; when the first partition 12 is a non-metal part, for example, the first partition 12 is a plastic part, and can be processed and manufactured by injection molding.

[0094] In some embodiments of the present invention, the second partition 13 is configured as an integrated structure. The second partition 13 of the integrated structure has a high overall structural strength, can effectively maintain the separation of the second space 103 and the air duct 102, and reduce the possibility of the second space 103 and the air duct 102 being connected, thereby further improving the safety of the user when using the HVAC device 100.

[0095] In addition, the second partition plate 13 having an integrated structure is easy to process and can effectively improve the processing efficiency, thereby effectively reducing the manufacturing cost.

[0096] It should be noted that the second partition 13 can be a metal part or a non-metal part. When the second partition 13 is a metal part, for example, the second partition 13 is a stainless steel part, and can be manufactured by stamping; when the second partition 13 is a non-metal part, for example, the first partition 12 is a plastic part, and can be manufactured by injection molding.

[0097] In addition, in other embodiments of the present application, the second partition 13 may be a split structure, which is formed by separate processing and then splicing.

[0098] In some embodiments of the present invention, Figure 7 As shown, the second partition plate 13 includes a plurality of plates, wherein the plurality of plates include a first plate 131, a second plate 132 and a third plate. The second plate 132 and the third plate are respectively connected to the same side of the first plate 131, and a through hole for the heat exchange tube 31 to pass through is opened on the first plate 131.

[0099] Specifically, when the second partition 13 is connected and fixed in the air duct 102, the first plate 131, the second plate 132 and the third plate are respectively connected to the inner wall of the shell body 11 located in the air duct 102, and after the second partition 13 is connected and fixed, the first plate 131, the second plate 132, the third plate and the inner wall of part of the shell body 11 are surrounded to form a second space 103 that is not connected to the air duct 102. The heat exchange assembly 30 is installed in the air duct 102, and the end of the heat exchange tube 31 of the heat exchange assembly 30 away from the compressor assembly 20 is arranged through the first plate 131, so that the bending area 311 of the heat exchange tube 31 is arranged in the second space 103.

[0100] The first plate 131, the second plate 132, the third plate and part of the inner wall of the shell body 11 are used to form a second space 103 that is not connected to the air duct 102, so that the second space 103 can be set on one side of the air duct 102, reducing the obstruction of the second space 103 to the airflow, allowing the airflow to pass through the air duct 102 more smoothly, thereby improving the flow efficiency of the airflow.

[0101] It should be noted that the second plate 132 and the third plate are respectively connected to the same side of the first plate 131 , and the structure formed by the first plate 131 , the second plate 132 and the third plate has various structural forms.

[0102] For example, Figure 7 As shown, the first plate body 131, the second plate body 132 and the third plate body are all flat plates, and the second plate body 132 and the third plate body are respectively vertically connected to the first plate body 131. At this time, the first plate body 131, the second plate body 132 and the third plate body 133 form a "half I-shaped" structure, and the "half I-shaped" structure has three openings, including a top opening, a bottom opening and a side opening, wherein the top opening is connected and fixed to the top plate of the shell body 11 (a sealing structure is set at the combining position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is set at the combining position), and the side opening is connected and fixed to the side wall of the shell body 11 located in the air duct 102 (the side opening is connected and fixed to the side plate of the shell body 11 constituting the air duct 102, and a sealing structure is set at the combining position).

[0103] Exemplarily, the first plate body 131, the second plate body 132 and the third plate body are all flat plates, and the second plate body 132 and the third plate body are respectively connected to the first plate body 131 at an angle. At this time, the first plate body 131, the second plate body 132 and the third plate body 133 form a trapezoidal structure or a parallelogram structure. Taking the trapezoidal structure as an example, the trapezoidal structure has three openings, including a top opening, a bottom opening and a side opening, wherein the top opening is connected and fixed to the top plate of the shell body 11 (a sealing structure is set at the combining position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is set at the combining position), and the side opening is connected and fixed to the side wall of the shell body 11 located in the air duct 102 (the side opening is connected and fixed to the side plate of the shell body 11 constituting the air duct 102, and a sealing structure is set at the combining position).

[0104] Exemplarily, the first plate body 131 is an arc-shaped plate, the second plate body 132 and the third plate body are flat plates, and the second plate body 132 and the third plate body are respectively connected to the first plate body 131. At this time, the first plate body 131, the second plate body 132 and the third plate body 133 form a U-shaped structure, and the U-shaped structure has three openings, including a top opening, a bottom opening and a side opening, wherein the top opening is connected and fixed to the top plate of the shell body 11 (a sealing structure is set at the combining position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is set at the combining position), and the side opening is connected and fixed to the side wall of the shell body 11 located in the air duct 102 (the side opening is connected and fixed to the side plate of the shell body 11 constituting the air duct 102, and a sealing structure is set at the combining position).

[0105] Furthermore, if Figure 1 As shown, the heat exchange tube 31 is arranged to pass through the first partition 12 and the second partition 13 respectively, and the heat exchange tube 31 has a main body structure in the first space 101, the air duct 102 and the second space 103, wherein a part of the body of the heat exchange tube 31 (the bending area 311) is located in the second space 103, a part of the body of the heat exchange tube 31 is located in the air duct 102 (exchanging heat with the airflow in the air duct 102), and another part of the body of the heat exchange tube 31 is located in the first space 101 (connected to the compressor assembly 20).

[0106] Among them, a through hole is opened on the first partition 12, and a through hole is opened on the second partition 13 (opened on the first plate body 131 of the second partition 13). The heat exchange tube 31 passes through the through hole so that the first space 101 and the air duct 102 both have the main body of the heat exchange tube 31. The heat exchange tube 31 passes through the through hole so that the air duct 102 and the second space 103 both have the main body of the heat exchange tube 31.

[0107] In some embodiments of the present invention, the heat exchange tube 31 is sealed and connected to the perforated hole. By sealing the perforated hole and the heat exchange tube 31, the second space 103 and the air duct 102 are further effectively isolated, and the air flow between the second space 103 and the air duct 102 is reduced. When the refrigerant leaks in the bending area 311 of the heat exchange tube 31, the refrigerant is reduced from entering the air duct 102 from the second space 103, and then the refrigerant is reduced from entering the room from the air duct 102, so that the safety of the user is effectively improved.

[0108] Exemplarily, the sealing connection between the heat exchange tube 31 and the perforation hole is achieved by a tube expansion process, that is, after the heat exchange tube 31 passes through the perforation hole, the heat exchange tube 31 is expanded by a tube expansion device, so that the diameter of the heat exchange tube 31 increases, thereby having an interference fit with the perforation hole, thereby achieving a sealed connection between the perforation hole and the heat exchange tube 31. The connection method of the tube expansion process is simple in structure and easy to implement, and can also effectively reduce the processing cost.

[0109] For example, the heat exchange tube 31 and the through hole are sealed by welding, that is, after the heat exchange tube 31 passes through the through hole, the through hole and the heat exchange tube 31 are welded and fixed at the joint. The welding method has high connection strength and better sealing effect.

[0110] Exemplarily, the sealing connection between the heat exchange tube 31 and the penetration hole is achieved by bonding, that is, after the heat exchange tube 31 passes through the penetration hole, a sealant is filled at the junction between the penetration hole and the heat exchange tube 31. The sealing is used to seal the junction between the penetration hole and the heat exchange tube 31, and the bonding process has a low cost.

[0111] In some embodiments of the present invention, Figure 2 As shown, an air outlet 111 and an air inlet 113 are respectively provided on the shell 10, and the indoor air is connected with one end of the air duct 102 through the air inlet 113, and the indoor air is also connected with the other end of the air duct 102 through the air outlet 111. The heat exchange component 30 is arranged between the air outlet 111 and the air inlet 113. The heat exchange component 30 is arranged inside the air duct 102 and covers the entire flow cross-section of the air duct 102.

[0112] Specifically, when the HVAC equipment 100 is running, the indoor airflow enters the air duct 102 through the air inlet 113 and exchanges heat with the heat exchange component 30. The airflow after heat exchange enters the room through the air outlet 111, thereby achieving indoor temperature regulation. The heat exchange component 30 is arranged in the air duct 102 and covers the entire flow cross-section of the air duct 102, thereby increasing the heat exchange area between the heat exchange component 30 and the airflow passing through the air duct 102, so that the heat exchange efficiency is effectively improved.

[0113] It should be understood that the heat exchange component 30 covers the entire flow cross-section of the air duct 102, which means that the heat exchange component 30 cuts off the flow cross-section of the air duct 102, and the airflow in the air duct 102 on opposite sides of the heat exchange component 30 can only be connected through the heat exchange component 30. At this time, the heat exchange component 30 exchanges heat for the passing airflow so that the airflow after heat exchange enters the room to adjust the indoor temperature.

[0114] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 4 as well as Figure 6 As shown, the flow cross section of the air duct 102 is narrowed along the direction from the air inlet 113 to the heat exchange assembly 30. Specifically, the flow cross section of the air duct 102 is narrowed along the direction from the air inlet 113 to the heat exchange assembly 30, which means that the flow cross section of the air duct 102 is gradually reduced in the direction from the air inlet 113 to the heat exchange assembly 30. When the indoor airflow enters the air duct 102 through the air inlet 113 and flows toward the heat exchange assembly 30, the flow cross section of the air duct 102 is gradually reduced, so that the airflow is gradually compressed, so that the flow speed of the airflow can be accelerated, thereby increasing the flow speed of the airflow, so that the heat exchange speed of the airflow is increased.

[0115] It should be pointed out that, in the present application, the flow cross-section of the air duct 102 includes but is not limited to a rectangular, circular, semicircular, triangular, pentagonal, hexagonal or elliptical shape.

[0116] In some embodiments of the present invention, Figure 2 as well as Figure 3 As shown, a communication hole 112 is opened on the shell body 11 , and the number of the communication hole 112 is at least one. The communication hole 112 is used to connect the second space 103 with the outdoors.

[0117] Specifically, the second space 103 accommodates the bending area 311 of the heat exchange tube 31 of the heat exchange assembly 30. The bending area 311 of the heat exchange tube 31 is prone to refrigerant leakage. The second space 103 is connected to the outdoors via the connecting hole 112, so that the leaked refrigerant can be discharged to the outdoors through the connecting hole 112, thereby reducing the possibility of refrigerant entering the room, thereby effectively improving the safety of users.

[0118] It should be noted that the shape of the communication hole 112 includes but is not limited to a circle, a rectangle, a semicircle, a triangle, a pentagon, a hexagon or an ellipse.

[0119] In addition, the number of the connecting holes 112 can be one, two, three, four, five, six, seven, eight, nine or ten, etc. When the number of the connecting holes 112 is multiple, the multiple connecting holes 112 can be dispersed or concentrated in one area (an area where the refrigerant is prone to leakage, so as to achieve rapid discharge of the leaked refrigerant).

[0120] In some embodiments of the present invention, the heat exchange assembly 30 further includes fins mounted on the heat exchange tube 31, and the fins are thermally connected to the heat exchange tube 31. By providing the fins, the contact area between the heat exchange assembly 30 and the airflow is increased, so that the heat exchange efficiency between the heat exchange assembly 30 and the airflow is effectively improved.

[0121] It should be pointed out that the fin is a thin sheet structure, and the shape of the fin can be a flat structure or a curved structure. The material of the fin is usually aluminum or copper, etc. The structure and material of the fin are set to increase the heat exchange capacity of the fin, so that the heat exchange efficiency of the heat exchange component 30 is further improved.

[0122] In addition, the fins are connected and fixed to the heat exchange tube 31 by welding or expansion technology. At the same time, the number of fins can be one, two, three, four, five, six, seven, eight, nine or ten, etc. When the number of fins is multiple, multiple fins are arranged on the heat exchange tube 31.

[0123] In some embodiments of the present invention, Figure 1 , Figure 2 as well as Figure 6 As shown, the HVAC equipment 100 further includes a fan assembly 40 installed in the air duct 102, and the fan assembly 40 provides a driving force for the airflow to circulate between the air duct 102 and the room. By providing the fan assembly 40, the airflow velocity between the room and the air duct 102 is increased, thereby increasing the heat exchange velocity between the heat exchange assembly 30 and the airflow, and effectively improving the heat exchange efficiency.

[0124] It should be noted that the fan assembly 40 (including but not limited to the motor, impeller and volute, etc.) is arranged in the air duct 102, and the fan assembly 40 is arranged between the air outlet 111 and the heat exchange assembly 30. When the HVAC equipment 100 is in operation, the operation of the fan assembly 40 causes the indoor airflow to enter the air duct 102 through the air inlet 113 and flow toward the heat exchange assembly 30. When the airflow passes through the heat exchange assembly 30, it exchanges heat with the heat exchange assembly 30. After the heat exchange, the airflow passes through the fan and the air outlet 111 and returns to the room to adjust the indoor temperature. Placing the extension assembly on the downstream side of the heat exchange assembly 30 can reduce the obstruction of the airflow by the fan assembly 40, so that the heat exchange assembly 30 can fully exchange heat with the airflow, so that the heat exchange efficiency of the heat exchange assembly 30 can be improved.

[0125] In some embodiments of the present invention, the HVAC equipment 100 is an air conditioner (in other embodiments of the present invention, the HVAC equipment 100 includes but is not limited to a multi-split unit, a heat pump, a water heater, a swimming pool unit, etc.), and the air conditioner is specifically a rooftop unit. For the structure of other parts of the rooftop unit, please refer to the prior art and will not be repeated in this application.

[0126] The second aspect of the present invention provides a method for controlling a HVAC device 100. The method for controlling the HVAC device 100 is implemented by the HVAC device 100 as described above. Figure 8 As shown, the HVAC equipment 100 control method includes:

[0127] S1: According to the HVAC equipment 100 being in operation state, the current pressure of the refrigerant is obtained.

[0128] Specifically, when the HVAC equipment 100 is running, the refrigerant circulates between the heat exchange tube 31 of the heat exchange assembly 30 and the compressor assembly 20, and the heat absorption and heat release of the refrigerant are used to adjust the indoor heat exchange temperature. During the circulation of the refrigerant, the refrigerant has a certain pressure in the heat exchange tube 31. When the refrigerant leaks from the bending area 311 of the heat exchange tube 31, the pressure of the refrigerant will change (reduced). At this time, the pressure of the refrigerant in the heat exchange tube 31 can directly reflect whether the refrigerant is leaking. Therefore, the refrigerant pressure in the heat exchange tube 31 can be detected by the refrigerant pressure sensor provided by the HVAC equipment 100, without the need to set up a separate refrigerant sensor, thereby reducing the installation of the refrigerant sensor, and further reducing the manufacturing cost of the HVAC equipment 100.

[0129] S2: According to the current ambient temperature, obtain the preset pressure of the refrigerant at the current ambient temperature.

[0130] Specifically, when the HVAC equipment 100 is in operation, the current pressure of the refrigerant in the heat exchange tube 31 is related to the ambient temperature, that is, the current pressure of the refrigerant in the heat exchange tube 31 changes with the change of the ambient temperature. Under different ambient temperatures, the refrigerant in the heat exchange tube 31 has different preset pressures. A comparison table of temperature and preset pressure of the refrigerant is stored in the control device of the HVAC equipment 100, and the current ambient temperature is detected, and the preset pressure corresponding to the detected current ambient temperature is obtained in the comparison table.

[0131] S3: Calculate the pressure difference between the preset pressure and the current pressure.

[0132] Specifically, when the pressure of the refrigerant in the heat exchange tube 31 leaks, the current pressure of the refrigerant in the heat exchange tube 31 will change (the current pressure of the refrigerant in the heat exchange tube 31 is less than the preset pressure). Therefore, by calculating the pressure difference between the preset pressure and the current pressure, it can be reflected whether the refrigerant is leaking.

[0133] S4: Calculate the refrigerant leakage based on the pressure difference.

[0134] Specifically, taking the HVAC equipment 100 in cooling mode as an example:

[0135] In the cooling operation mode, the outdoor ambient temperature T4 = A; the indoor ambient temperature T2 = I1, I2, I3, ... I 10 ;

[0136] (Note: I1, I2, I3, ... I 10 ; The 10 temperature point values ​​are generated by dividing the user's refrigeration room allowable set temperature into 9 equal parts).

[0137] Test condition 1: T4 = A; T2 = I1, refrigerant filling 100%; read high pressure data: P0;

[0138] Simulate refrigerant leakage 50g; read high pressure data: P1;

[0139] Simulate refrigerant leakage 100g; read high pressure data: P2;

[0140] …

[0141] The simulated leakage interval is: 50g / time;

[0142] Simulate refrigerant leakage 1840g; read high pressure data: P 36 ;

[0143] Pressure deviation value (pressure difference) P (P = P0-P N ; N = 1, 2, 3 ... 36) and the refrigerant leakage mass M are plotted in a scatter plot, and a fitting polynomial for the relationship between M and P is generated:

[0144] M=a*P 2 +b*P+c(1); (a, b, c are fitting coefficients, determined based on actual measurements)

[0145] Test condition 2: T4 = A; T2 = I2; ... Test condition 10: T4 = A; T2 = I 10 ; The fitting polynomials of the relationship between M and P are obtained respectively: (2), (3)…(10);

[0146] According to the above cooling mode, the outdoor ambient temperature T4 = A; the indoor ambient temperature T1 = I1, I2, I3, ... I 10 ; Test method: Test the cooling operation mode in sequence, outdoor ambient temperature T4 = B, C...J (a total of 10 outdoor operating points), indoor ambient temperature T2 = I1, I2, I3,...I 10 ; The fitting relationship between M and P under different internal and external ambient temperatures is obtained: (11), (12), ... (100); In actual operation, according to the collected outdoor ambient temperature T4 and indoor ambient temperature T2, the closest temperature value is found in the memory according to the difference method, and then the 100 fitting relationship between M and P are substituted to calculate the system refrigerant leakage mass M (refrigerant leakage amount).

[0147] S5: According to the refrigerant leakage amount being less than or equal to the first preset value, the HVAC equipment 100 is controlled to keep running.

[0148] Specifically, there will be a certain error when adding refrigerant, and the pressure of the refrigerant will fluctuate during operation. At this time, a first preset value is set, and the first preset value is set as the allowable error of the refrigerant. When the leakage of the refrigerant is less than or equal to the first preset value, it indicates that the refrigerant in the HVAC equipment 100 is within the allowable error range and there is no refrigerant leakage. At this time, the HVAC equipment 100 can remain in the current operating mode without further action, reducing the impact on user use.

[0149] S6: Based on the refrigerant leakage amount being greater than the first preset value and the refrigerant leakage amount being less than or equal to the second preset value, the HVAC equipment 100 is controlled to keep running and a refrigerant leakage reminder is issued, wherein the first preset value is less than the second preset value.

[0150] Specifically, when the refrigerant of the HVAC equipment 100 leaks, a small amount of refrigerant leakage will not have adverse effects on users, but when the refrigerant leakage reaches a certain amount, it will cause safety hazards to users. For example, when the HVAC equipment 100 uses a flammable refrigerant (A2L refrigerant such as R32, R454B, etc.), when the flammable refrigerant leaks into the room and reaches a certain leakage amount, the flammable refrigerant will explode when encountering an open flame, but a small amount of flammable refrigerant leakage will not cause an explosion.

[0151] In the present application, a first preset value and a second preset value are set, wherein the first preset value is used as a starting condition for whether to trigger the HVAC equipment 100 to further take refrigerant leakage protection measures, and the second preset value is used as a revelation condition for whether to trigger the HVAC equipment 100 to take compulsory protection measures.

[0152] Compare the refrigerant leakage with the first preset value. When the refrigerant leakage is less than or equal to the first preset value, it indicates that the refrigerant leakage is still in a safe state, and there is no need to control the HVAC equipment 100. At this time, the HVAC equipment 100 is controlled to remain in the current working mode. When the refrigerant leakage is greater than the first preset value and less than or equal to the second preset value, it indicates that the refrigerant leakage is in a leakage state, but the refrigerant leakage is small. The control device controls the HVAC equipment 100 to maintain the current operating mode, but issues a refrigerant leakage reminder. Among them, the refrigerant leakage reminder includes but is not limited to sound, light or display screen flashing prompt information, etc.

[0153] S7: According to the refrigerant leakage amount being greater than the second preset value, the compressor assembly 20 and the auxiliary heating assembly are controlled to stop running, and the fan assembly 40 is controlled to run at the highest gear and issue a refrigerant leakage reminder.

[0154] Specifically, the refrigerant leakage amount is compared with the second preset value. When the refrigerant leakage amount is greater than the second preset value, it indicates that the refrigerant leakage amount is relatively serious, and the HVAC equipment 100 needs to be controlled (the compressor component 20 and the auxiliary heating component are controlled to stop running, and the fan component 40 is controlled to run at the highest gear) to eliminate the adverse effects of the refrigerant leakage, and a refrigerant leakage reminder is issued at the same time. The refrigerant leakage reminder includes but is not limited to sound, light or display screen flashing prompt information, etc.

[0155] According to the control method of the HVAC equipment 100 of the present invention, the leakage of the refrigerant is calculated according to the pressure difference between the current pressure and the preset pressure during the operation of the HVAC equipment 100, and the HVAC equipment 100 is controlled according to the comparison result of the leakage of the refrigerant with the first preset value and the second preset value, so as to improve the safety of the use of the HVAC equipment 100. The control method of the HVAC equipment 100 does not need to use a refrigerant sensor, thereby reducing the manufacturing cost of the HVAC equipment 100.

[0156] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A HVAC equipment, characterized in that: The HVAC equipment includes: A housing, the housing having a first space, a second space and an air duct, the first space being used to communicate with the outdoors, the air duct being disconnected from the first space and being used to communicate with the indoors, and the second space being arranged in the air duct and being disconnected from the air duct; a compressor assembly, the compressor assembly being disposed in the first space; A heat exchange component is arranged in the air duct, the heat exchange component includes a heat exchange tube, one side of the heat exchange tube is connected to the compressor assembly, and the other side of the heat exchange tube away from the one side is provided with at least one bending area, and the at least one bending area is arranged in the second space.

2. The HVAC equipment according to claim 1, characterized in that: The housing comprises: A shell body, wherein the shell body has a receiving space; a first partition plate, which is disposed in the receiving space and cooperates with the shell body to separate the first space and the air duct in the receiving space; A second partition is disposed in the air duct and cooperates with the shell body to separate the second space in the air duct.

3. The HVAC equipment according to claim 2, characterized in that: The first partition plate is connected to the inner wall of the shell body by bonding, screw connection, clamping, riveting or welding; And / or, the second partition plate is connected to the inner wall of the shell body by bonding, screw connection, clamping, riveting or welding.

4. The HVAC equipment according to claim 2, characterized in that: The first partition is an integrated structure; And / or, the second partition is an integrated structure.

5. The HVAC equipment according to claim 2, characterized in that: The second separator comprises: A first plate body, wherein a through hole is formed on the first plate body, and the heat exchange tube is passed through the through hole; a second plate body, the second plate body being connected to the first plate body and being located on one side of the first plate body; A third plate body, the third plate body is connected to the first plate body, and the third plate body and the second plate body are located on the same side of the first plate body, and the first plate body, the second plate body and the third plate body are respectively connected to the inner wall of the shell body to enclose the second space.

6. The HVAC equipment according to claim 5, characterized in that: The heat exchange tube is sealed and connected to the penetration hole.

7. The HVAC equipment according to claim 1, characterized in that: The shell is respectively provided with an air inlet and an air outlet, one end of the air duct is connected with the indoor room through the air inlet, and the other end of the air duct is connected with the indoor room through the air outlet, the heat exchange component is arranged between the air inlet and the air outlet, and the heat exchange component covers the entire flow cross-section of the air duct.

8. The HVAC equipment according to claim 7, characterized in that: Along the direction from the air inlet to the heat exchange component, the flow cross-section of the air duct is narrowed.

9. The HVAC equipment according to any one of claims 1 to 8, characterized in that: The shell is provided with at least one communication hole, and the second space is connected with the outside through the at least one communication hole.

10. The HVAC equipment according to any one of claims 1 to 8, characterized in that: The heat exchange component also includes fins, which are sleeved on the heat exchange tubes and thermally connected to the heat exchange tubes.

11. The HVAC equipment according to any one of claims 1 to 8, characterized in that: The HVAC equipment further comprises a fan assembly, which is installed in the air duct and is used to provide a driving force for the air flow to circulate between the room and the air duct.

12. A method for controlling a HVAC device, the method being implemented by the HVAC device according to any one of claims 1 to 11, characterized in that: The HVAC equipment control method comprises: According to the HVAC equipment being in an operating state, obtaining the current pressure of the refrigerant; According to the current ambient temperature, obtaining a preset pressure of the refrigerant at the current ambient temperature; Calculating a pressure difference between the preset pressure and the current pressure; Calculating the refrigerant leakage amount according to the pressure difference; According to the refrigerant leakage amount being less than or equal to the first preset value, controlling the HVAC equipment to keep running; According to the refrigerant leakage amount being greater than the first preset value and the refrigerant leakage amount being less than or equal to a second preset value, controlling the HVAC equipment to keep running and issuing a refrigerant leakage reminder, wherein the first preset value is less than the second preset value; According to the refrigerant leakage amount being greater than the second preset value, the compressor assembly and the auxiliary heating assembly are controlled to stop running, and the fan assembly is controlled to run at the highest gear and issue a refrigerant leakage reminder.

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