Heating and ventilation device, and control method for heating and ventilation device

Abstract

Disclosed in the present application are a heating and ventilation device, and a control method for a heating and ventilation device. The heating and ventilation device comprises a housing, a compressor assembly and a heat exchange assembly, wherein the housing has a first space, a second space and an air duct, the first space being configured to be in communication with the outside, the air duct and the first space not being in communication with each other and being configured to be in communication with the inside, and the second space being arranged in the air duct and not being in communication with the air duct; the compressor assembly is arranged in the first space; and the heat exchange assembly is arranged in the air duct and comprises a heat exchange pipe, one side of the heat exchange pipe being in communication with the compressor assembly, and on the other side opposite to said side, the heat exchange pipe having at least one bending region that is arranged in the second space. Since refrigerant leakage easily occurs at a bending position of a heat exchange pipe of a heat exchange assembly, allowing the bending position of the heat exchange pipe to be in the second space achieves isolation of a refrigerant leaked from the heat exchange pipe, which omits the installation of a refrigerant sensor while improving the usage safety, thereby reducing the manufacturing cost of a heating and ventilation device.

Description

HVAC equipment and HVAC equipment control method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] Chinese patent application number 202311135846.1, entitled “HVAC equipment and HVAC equipment control method,” filed with the State Intellectual Property Office of China on September 4, 2023;

[0004] A Chinese patent application entitled “HVAC Equipment”, application number 202322399376.1, submitted to the State Intellectual Property Office of China on September 4, 2023. Technical Field

[0005] The present application belongs to the technical field of HVAC equipment, and in particular relates to a HVAC equipment and a HVAC equipment control method. Background Art

[0006] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0007] Existing HVAC equipment usually 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.

[0008] Indoor heat exchange tubes have kinks, which can easily lead to refrigerant leakage, particularly of flammable refrigerants (such as R454B), posing a safety hazard to users. Conventional methods have been developed to detect refrigerant leaks and improve user safety. However, installing refrigerant sensors is expensive, increasing the manufacturing cost of HVAC equipment.

[0009] Summary of the Invention

[0010] The purpose of this application 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:

[0011] A first aspect of the present application provides a HVAC device, comprising:

[0012] a housing having a first space, a second space, and an air duct, wherein the first space is connected to the outside of the room, the air duct is disconnected from the first space and is connected to the room, and the second space is located in the air duct and is disconnected from the air duct;

[0013] a compressor assembly, the compressor assembly being disposed in the first space;

[0014] A heat exchange component is arranged in the air duct, and 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.

[0015] According to the HVAC equipment of the present application, indoor air enters the air duct and exchanges heat with the heat exchange component, and after heat exchange in the air duct, it returns to the room again, thereby increasing and changing 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 refrigerant sensors is reduced, thereby reducing the manufacturing cost of the HVAC equipment.

[0016] In addition, the HVAC equipment according to the present application may also have the following additional technical features:

[0017] In some embodiments of the present application, the housing includes:

[0018] a shell body, wherein the shell body has a receiving space;

[0019] a first partition, 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;

[0020] A second partition is provided in the air duct and cooperates with the shell body to separate the second space in the air duct.

[0021] In some embodiments of the present application, the first partition and the inner wall of the shell body are connected by bonding, screw connection, clamping, riveting or welding;

[0022] And / or, the second partition is connected to the inner wall of the shell body by bonding, screw connection, clamping, riveting or welding.

[0023] In some embodiments of the present application, the first partition is an integrated structure;

[0024] And / or, the second partition is an integrated structure.

[0025] In some embodiments of the present application, the second separator includes:

[0026] 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;

[0027] 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;

[0028] 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, the first plate body, the second plate body and the third plate body are respectively connected to the inner wall of the shell body and enclose the second space.

[0029] In some embodiments of the present application, the heat exchange tube is sealedly connected to the penetration hole.

[0030] In some embodiments of the present application, 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.

[0031] In some embodiments of the present application, the flow cross-section of the air duct is narrowed along the direction from the air inlet to the heat exchange component.

[0032] In some embodiments of the present application, at least one communication hole is provided on the shell, and the second space is connected to the outdoors through the at least one communication hole.

[0033] In some embodiments of the present application, the heat exchange assembly further includes fins, which are mounted on the heat exchange tubes and are thermally connected to the heat exchange tubes.

[0034] In some embodiments of the present application, the HVAC equipment further includes 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.

[0035] A second aspect of the present application provides a method for controlling a heating and ventilation equipment. The method is implemented by the heating and ventilation equipment as described above. The method includes:

[0036] According to the HVAC equipment being in an operating state, obtaining the current pressure of the refrigerant;

[0037] According to the current ambient temperature, obtaining a preset pressure of the refrigerant at the current ambient temperature;

[0038] Calculating a pressure difference between the preset pressure and the current pressure;

[0039] calculating the refrigerant leakage amount according to the pressure difference;

[0040] According to the refrigerant leakage amount being less than or equal to a first preset value, controlling the HVAC equipment to keep running;

[0041] 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;

[0042] 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, the fan assembly is controlled to run at the highest gear and a refrigerant leakage reminder is issued.

[0043] According to the HVAC equipment control method of the present application, the refrigerant leakage amount is calculated based on the pressure difference between the current pressure and the preset pressure during the operation of the HVAC equipment. The HVAC equipment is controlled based on the comparison result of the refrigerant leakage amount with the first preset value and the second preset value, thereby improving the safety of the HVAC equipment. This HVAC equipment control method does not require the use of a refrigerant sensor, thereby reducing the manufacturing cost of the HVAC equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the specific embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0045] FIG1 schematically shows a structural diagram of a HVAC device according to an embodiment of the present application;

[0046] FIG2 is a schematic diagram of a portion of the HVAC equipment shown in FIG1 ;

[0047] FIG3 is an enlarged structural diagram of part A of the structure shown in FIG2 ;

[0048] FIG4 is a schematic diagram of a portion of the HVAC equipment shown in FIG1 ;

[0049] FIG5 is a schematic diagram of an enlarged structure of part B of the structure shown in FIG4 ;

[0050] FIG6 is a schematic diagram of a portion of the HVAC equipment shown in FIG2 ;

[0051] FIG7 is an enlarged structural diagram of portion C of the structure shown in FIG6 ;

[0052] FIG8 schematically shows a flow chart of a method for controlling HVAC equipment according to an embodiment of the present application.

[0053] The reference numerals are as follows: 100, HVAC equipment; 10, housing; 101, first space; 102, air duct; 103, second space; 11, housing body; 111, air outlet; 112, communication hole; 113, air inlet; 114, heat exchange hole; 12, first partition; 13, second partition; 131, first plate; 132, second plate; 133, third body; 20, compressor assembly; 30, heat exchange assembly; 31, heat exchange tube; 311, bending area; 40, fan assembly. DETAILED DESCRIPTION

[0054] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, these embodiments are provided 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.

[0055] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only 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 "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence 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 to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0056] 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 otherwise, 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.

[0057] For ease of description, spatially 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 figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0058] As shown in FIG. 1 to FIG. 8 , according to an embodiment of the present application, a HVAC device 100 is proposed. The HVAC device 100 includes a housing 10 , a heat exchange assembly 30 , and a compressor assembly 20 .

[0059] Within the housing 10, a non-interconnected air duct 102, a first space 101, and a second space 103 are provided. The outside of the room is connected to the first space 101, while the inside of the room is connected to the air duct 102. A heat exchange assembly 30 is installed within 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 within the first space 101 and is connected to one side of a heat exchange tube 31 of the heat exchange assembly 30. The heat exchange tube 31 has at least one bending region 311 on its side, away from the side connected to the compressor assembly 20. The end of the heat exchange tube 31 connected to the compressor assembly 20 is located away from the bending region 311, which is located within the second space 103.

[0060] In the present application, when the HVAC equipment 100 is in operation, indoor air enters the air duct 102 and undergoes heat exchange with the heat exchange assembly 30. After heat exchange in the air duct 102, the air returns to the indoor air, thereby increasing 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. The second space 103 is not connected to the air duct 102. When refrigerant leaks at the bending position of the heat exchange tube 31, the leaked refrigerant cannot enter the indoor air through the air duct 102, thereby improving user safety during use. By setting up the second space 103 that is not connected to the air duct 102, the refrigerant leaking from the heat exchange tube 31 is isolated. While improving safety in use, the installation of refrigerant sensors is reduced, thereby reducing the manufacturing cost of the HVAC equipment 100.

[0061] It should be understood that the first space 101 and the air duct 102 are respectively formed inside the housing 10. The fact that they are not connected to each other means that the first space 101 is isolated from the air duct 102. 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 a refrigerant leak occurs in the compressor assembly 20, the refrigerant is discharged to the outside and will not enter the room through the air duct 102, thereby improving user safety during use.

[0062] Furthermore, the second space 103 is disposed within the air duct 102. The fact that the second space 103 and the air duct 102 are not connected to each other means that the airflow within the second space 103 cannot enter the air duct 102, and the airflow within the air duct 102 cannot enter the second space 103. The bending region 311 of the heat exchange tube 31 is disposed within the second space 103. If refrigerant leaks from the bending region 311 of the heat exchange tube 31, the leaked refrigerant cannot enter the room through the air duct 102, effectively improving user safety.

[0063] 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 connection position is located in the first space 101, that is, the refrigerant inlet end passes through the side wall of the air duct 102 into 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 ... refrigerant inlet end passes through the air duct 102. It is placed in the first space 101, that is, the refrigerant outflow end passes through the side wall of the air duct 102 into 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 a sealing component, 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 air flow in the air duct 102 through the heat exchange tube 31. The refrigerant after heat exchange flows out through the refrigerant outflow end.

[0064] Furthermore, the body of the heat exchange tube 31 between the refrigerant inlet and outlet ends is configured as a coil structure (the coil structure is serpentine), and a bending area 311 is formed at the bending position, thereby reducing the overall volume of the heat exchange tube 31 to improve the convenience of layout and installation of the heat exchange assembly 30. The refrigerant inlet and outlet ends are located on the same side of the coil structure, and a bending area 311 is provided on the other side of the coil structure (the side of the heat exchange tube 31 facing away from the compressor assembly 20), and the number of the bending areas 311 is at least one. At the location of the bending area 311, the heat exchange tube 31 is prone to refrigerant leakage because the curvature radius 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.

[0065] 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.

[0066] In addition, the shape of the bending region 311 can be U-shaped, W-shaped, V-shaped, etc. In the present application, the shape of the bending region 311 is U-shaped to reduce the possibility of refrigerant leakage caused by damage to the bending region 311.

[0067] 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 outside through the heat exchange hole 114. The compressor assembly 20 is arranged in the first space 101, and the compressor assembly 20 is connected to the outside through the heat exchange hole 114 and exchanges heat with the outdoor space. When the HVAC equipment 100 is in heating mode, the compression assembly absorbs heat from the outside and releases heat in the air duct 102 through the heat exchange assembly 30. When the HVAC equipment 100 is in 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 outside.

[0068] In some embodiments of the present application, as shown in FIG. 1 , FIG. 2 , FIG. 4 and FIG. 6 , the housing 10 includes a first partition 12 , a second partition 13 and a shell body 11 .

[0069] 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. 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.

[0070] The first partition 12 and the second partition 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.

[0071] 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, thereby blocking the space between the top plate and the bottom plate, and then enclosing a receiving space.

[0072] 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, thereby separating 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, thereby separating a second space 103 that is not connected to the air duct 102 in the air duct 102.

[0073] 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.

[0074] The first partition 12 and the second partition 13 can be made of the same material or different materials. In this 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, which is convenient for unifying materials and reducing the overall manufacturing cost of the shell 10.

[0075] In some embodiments of the present application, as shown in Figures 1, 2, 4 and 6, the first partition 12 is arranged in the receiving space of the shell body 11, and the inner wall of the shell body 11 and the first partition 12 are connected and fixed, 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.

[0076] 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 is effectively improved, thereby achieving effective separation of the first space 101 and the air duct 102, thereby achieving 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.

[0077] For example, the first partition 12 is screwed to the inner wall of the shell body 11, wherein a flange structure is provided at the connection between the first partition 12 and the inner wall of the shell body 11. The flange structure abuts the inner wall of the shell body 11, and screws are screwed at the abutment point between the flange structure and the inner wall of the shell body 11. In addition, a sealing structure (such as a sealing gasket or sealant) is provided between the flange structure and the inner wall of the shell body 11 to reduce the possibility of communication between the first space 101 and the air duct 102.

[0078] Exemplarily, the first partition 12 is welded to the inner wall of the shell body 11, wherein the connection position between the first partition 12 and the inner wall of the shell body 11 is fully welded, and the first partition 12 is connected and fixed by welding and the strength of the connection position is improved. The full welding method improves the sealing of the connection position to reduce the possibility of the first space 101 being connected to the air duct 102.

[0079] In some embodiments of the present application, as shown in Figures 1, 2, 4 and 6, 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.

[0080] By setting the connection method 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 is effectively improved, thereby achieving effective separation of the second space 103 and the air duct 102, so as to achieve effective separation of the heat exchange tube 31 from the indoor side at the leakage position (bending area 311), thereby reducing the adverse effects of the refrigerant on the indoor side and further improving the safety of users during use.

[0081] For example, the second partition 13 is screwed to the inner wall of the shell body 11, wherein a flange structure is provided at the connection between the second partition 13 and the inner wall of the shell body 11. The flange structure abuts the inner wall of the shell body 11, and screws are screwed at the abutment point between the flange structure and the inner wall of the shell body 11. In addition, a sealing structure (such as a sealing gasket or sealant) is provided between the flange structure and the inner wall of the shell body 11 to reduce the possibility of the second space 103 communicating with the air duct 102.

[0082] Exemplarily, the second partition 13 is welded to the inner wall of the shell body 11, wherein the connection position between the second partition 13 and the inner wall of the shell body 11 is fully welded, and the second partition 13 is connected and fixed by welding and the strength of the connection position is improved. The full welding method improves the sealing of the connection position to reduce the possibility of the second space 103 being connected to the air duct 102.

[0083] In some embodiments of the present application, the first partition 12 is configured as an integrated structure. The integrated first partition 12 has a high overall structural strength, effectively maintaining the separation between the first space 101 and the air duct 102, reducing the possibility of the first space 101 and the air duct 102 being connected, thereby further improving the safety of users when using the HVAC equipment 100.

[0084] In addition, the first partition 12 having an integrated structure is easy to process, which effectively improves the processing efficiency and thus effectively reduces the manufacturing cost.

[0085] 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 ​​together to form the second partition 13.

[0086] 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, it can be manufactured by stamping. When the first partition 12 is a non-metal part, for example, the first partition 12 is a plastic part, it can be manufactured by injection molding.

[0087] In some embodiments of the present application, the second partition 13 is configured as an integrated structure. The integrated second partition 13 has a high overall structural strength, effectively maintaining the separation between the second space 103 and the air duct 102, reducing the possibility of the second space 103 and the air duct 102 communicating with each other, thereby further improving the safety of users when using the HVAC equipment 100.

[0088] In addition, the second partition plate 13 having an integrated structure is easy to process, which effectively improves the processing efficiency and thus effectively reduces the manufacturing cost.

[0089] 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, it 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, it can be manufactured by injection molding.

[0090] In addition, in other embodiments of the present application, the second partition 13 may be a split structure, which is formed by separately processing and then splicing.

[0091] In some embodiments of the present application, as shown in FIG7 , the second partition plate 13 includes a plurality of plates, including 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 the first plate 131 is provided with a through hole for the heat exchange tube 31 to pass through.

[0092] When the second baffle 13 is connected and fixed within 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 within the air duct 102. After the second baffle 13 is connected and fixed, the first plate 131, the second plate 132, the third plate, and a portion of the inner wall of the shell body 11 together 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. The end of the heat exchange tube 31 of the heat exchange assembly 30 that faces 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 disposed within the second space 103.

[0093] 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 is set on one side of the air duct 102, reducing the obstruction of the second space 103 to the airflow, making the airflow through the air duct 102 smoother, and improving the flow efficiency of the airflow.

[0094] 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.

[0095] Exemplarily, as shown in Figure 7, 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 vertically 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, which 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 provided at the combining position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is provided 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 provided at the combining position).

[0096] Exemplarily, the first plate 131, the second plate 132 and the third plate are all flat plates, and the second plate 132 and the third plate are respectively connected to the first plate 131 at an angle. At this time, the first plate 131, the second plate 132 and the third plate 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 provided at the combining position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is provided 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 provided at the combining position).

[0097] Exemplarily, the first plate 131 is an arc-shaped plate, the second plate 132 and the third plate are flat plates, and the second plate 132 and the third plate are respectively connected to the first plate 131. At this time, the first plate 131, the second plate 132 and the third plate 133 form a U-shaped structure, which 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 combination position), the bottom opening is connected and fixed to the bottom plate of the shell body 11 (a sealing structure is set at the combination 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 combination position).

[0098] Furthermore, as shown in Figure 1, the heat exchange tube 31 is arranged 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).

[0099] 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.

[0100] In some embodiments of the present application, the heat exchange tube 31 is sealed to the perforation. This sealed connection between the perforation and the heat exchange tube 31 further effectively isolates the second space 103 from the air duct 102, reducing airflow between the second space 103 and the air duct 102. In the event of refrigerant leakage from the bend area 311 of the heat exchange tube 31, this reduces the amount of refrigerant entering the air duct 102 from the second space 103, thereby reducing the amount of refrigerant entering the room from the air duct 102, effectively improving user safety.

[0101] For example, the heat exchange tube 31 is sealed to the perforation through a tube expansion process. This involves inserting the heat exchange tube 31 through the perforation through a tube expansion device, expanding the heat exchange tube 31. This increases the diameter of the heat exchange tube 31, creating an interference fit with the perforation, and thereby achieving a sealed connection between the perforation and the heat exchange tube 31. This tube expansion process offers a simple structure and ease of implementation, while also effectively reducing processing costs.

[0102] For example, the heat exchange tube 31 is sealed to the through hole by welding, that is, after the heat exchange tube 31 passes through the through hole, it is welded and fixed at the junction of the through hole and the heat exchange tube 31. Welding has high connection strength and good sealing effect.

[0103] For example, the heat exchange tube 31 and the through-hole are sealed by bonding, i.e., after the heat exchange tube 31 passes through the through-hole, a sealant is filled at the junction between the through-hole and the heat exchange tube 31. The use of the sealant to seal the junction between the through-hole and the heat exchange tube 31 reduces the cost of the bonding process.

[0104] In some embodiments of the present application, as shown in Figure 2, an air outlet 111 and an air inlet 113 are respectively provided on the shell 10, and the indoor air is connected to one end of the air duct 102 through the air inlet 113. At the same time, the indoor air is also connected to 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 section of the air duct 102.

[0105] When HVAC equipment 100 is operating, indoor air flows through air inlet 113 into air duct 102 and exchanges heat with heat exchange assembly 30. The heat exchanged air then flows through air outlet 111 into the room, thereby regulating the indoor temperature. Heat exchange assembly 30 is positioned within air duct 102 and covers the entire cross-section of air duct 102, thereby increasing the heat exchange area between heat exchange assembly 30 and the airflow passing through air duct 102 and effectively improving heat exchange efficiency.

[0106] 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 is only 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.

[0107] In some embodiments of the present application, as shown in Figures 1, 2, 4, and 6, 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. The narrowing of the flow cross-section of the air duct 102 along the direction from the air inlet 113 to the heat exchange assembly 30 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 airflow is gradually compressed due to the gradual reduction of the flow cross-section of the air duct 102, thereby accelerating the flow velocity of the airflow, thereby increasing the flow velocity of the airflow and increasing the heat exchange rate of the airflow.

[0108] It should be noted 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.

[0109] In some embodiments of the present application, as shown in FIG. 2 and FIG. 3 , a connecting hole 112 is provided on the shell body 11 . There is at least one connecting hole 112 , and the connecting hole 112 is used to connect the second space 103 with the outdoors.

[0110] Among them, 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 by using the connecting hole 112, so that the leaked refrigerant is discharged to the outdoors through the connecting hole 112, thereby reducing the possibility of refrigerant entering the room, and effectively improving the safety of users.

[0111] 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.

[0112] In addition, the number of connecting holes 112 can be one, two, three, four, five, six, seven, eight, nine or ten, etc. When the number of connecting holes 112 is multiple, the multiple connecting holes 112 can be dispersed or concentrated in one area (an area where refrigerant is prone to leakage, so as to achieve rapid discharge of leaked refrigerant).

[0113] In some embodiments of the present application, the heat exchange assembly 30 further includes fins mounted on the heat exchange tubes 31, the fins being thermally connected to the heat exchange tubes 31. The provision of the fins increases the contact area between the heat exchange assembly 30 and the airflow, thereby effectively improving the heat exchange efficiency between the heat exchange assembly 30 and the airflow.

[0114] 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.

[0115] 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.

[0116] In some embodiments of the present application, as shown in Figures 1, 2, and 6, the HVAC equipment 100 further includes a fan assembly 40 installed in the air duct 102. The fan assembly 40 provides a driving force for the airflow to circulate between the air duct 102 and the indoor space. By providing the fan assembly 40, the airflow velocity between the indoor space and the air duct 102 is increased, thereby increasing the heat exchange rate between the heat exchange assembly 30 and the airflow, thereby effectively improving the heat exchange efficiency.

[0117] 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 air flow to enter the air duct 102 through the air inlet 113 and flow toward the heat exchange assembly 30. When the air flow passes through the heat exchange assembly 30, it exchanges heat with the heat exchange assembly 30. After the heat exchange, the air flow 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 reduces the obstruction of the air flow by the fan assembly 40, allowing the heat exchange assembly 30 to fully exchange heat with the air flow, thereby improving the heat exchange efficiency of the heat exchange assembly 30.

[0118] In some embodiments of the present application, the above-mentioned HVAC equipment 100 is an air conditioner (in other embodiments of the present application, 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 elaborated in this application.

[0119] The second aspect of the present application provides a method for controlling a HVAC device 100. The method is implemented by the HVAC device 100 as described above. As shown in FIG8 , the method includes:

[0120] S1: According to the HVAC equipment 100 being in an operating state, the current pressure of the refrigerant is obtained.

[0121] Among them, when the HVAC equipment 100 is running, the refrigerant circulates between the heat exchange tube 31 of the heat exchange component 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 process, 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 (decrease). 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.

[0122] S2: According to the current ambient temperature, obtain the preset pressure of the refrigerant at the current ambient temperature.

[0123] During operation of HVAC equipment 100, the current pressure of the refrigerant within heat exchange tube 31 is related to the ambient temperature. Specifically, the current pressure of the refrigerant within heat exchange tube 31 varies with ambient temperature. At different ambient temperatures, the refrigerant within heat exchange tube 31 has different preset pressures. A table comparing temperatures and preset refrigerant pressures is stored within the control device of HVAC equipment 100. The control device detects the current ambient temperature and retrieves the corresponding preset pressure from the table.

[0124] S3: Calculate the pressure difference between the preset pressure and the current pressure.

[0125] Among them, 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 is reflected whether the refrigerant is leaking.

[0126] S4: Calculate the refrigerant leakage based on the pressure difference.

[0127] Here, the HVAC equipment 100 is in cooling mode as an example:

[0128] In cooling mode, the outdoor ambient temperature T4 = A; the indoor ambient temperature T2 = I1, I2, I3, ... I 10 ;

[0129] (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).

[0130] Test condition 1: T4 = A; T2 = I1, refrigerant is filled 100%; read high pressure data: P0;

[0131] Simulate refrigerant leakage 50g; read high pressure data: P1;

[0132] Simulate refrigerant leakage 100g; read high pressure data: P2;

[0133] …

[0134] The simulated leakage interval is: 50g / time;

[0135] Simulate refrigerant leakage 1840g; read high pressure data: P 36 ;

[0136] Pressure deviation (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:

[0137] M=a*P 2 +b*P+c(1); (a, b, c are fitting coefficients, determined based on actual measurements)

[0138] 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);

[0139] 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 searched in the memory according to the difference method, and then the 100 fitting relationship between M and P are used to calculate the system refrigerant leakage mass M (refrigerant leakage amount).

[0140] 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.

[0141] Among them, 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 maintain the current operating mode without performing further actions, which reduces the impact on user use.

[0142] 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.

[0143] When a refrigerant leak occurs in the HVAC equipment 100, a small amount will not adversely affect the user, but a certain amount of refrigerant leakage may pose a safety hazard to the user. For example, when the HVAC equipment 100 uses a flammable refrigerant (A2L refrigerant such as R32, R454B, etc.), if the flammable refrigerant leaks into the room and reaches a certain amount, the flammable refrigerant may explode when exposed to an open flame. However, a small amount of flammable refrigerant leakage will not cause an explosion.

[0144] In this application, a first preset value and a second preset value are set, wherein the first preset value is used as the 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 the inspiration condition for whether to trigger the HVAC equipment 100 to take compulsory protection measures.

[0145] The refrigerant leakage amount is compared with a first preset value. When the refrigerant leakage amount is less than or equal to the first preset value, it indicates that the refrigerant leakage amount 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 maintain the current operating mode. When the refrigerant leakage amount is greater than the first preset value and less than or equal to the second preset value, it indicates that the refrigerant leakage amount is in a leaking state, but the refrigerant leakage amount is small. The control device controls the HVAC equipment 100 to maintain the current operating mode, but issues a refrigerant leakage reminder. The refrigerant leakage reminder includes but is not limited to sound, light, or flashing prompt information on the display screen.

[0146] 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 a refrigerant leakage reminder is issued.

[0147] The refrigerant leakage amount is compared with a second preset value. When the refrigerant leakage amount is greater than the second preset value, it indicates that the refrigerant leakage is serious and the HVAC equipment 100 needs to be controlled (the compressor assembly 20 and the auxiliary heating assembly are stopped and the fan assembly 40 is operated at the highest gear) to eliminate the adverse effects of the refrigerant leakage. At the same time, a refrigerant leakage reminder is issued. The refrigerant leakage reminder includes but is not limited to sound, light, or a flashing display prompt message.

[0148] According to the control method for HVAC equipment 100 of the present application, the refrigerant leakage amount is calculated based on the pressure difference between the current pressure and the preset pressure during the operation of HVAC equipment 100, and HVAC equipment 100 is controlled based on the comparison result of the refrigerant leakage amount with the first preset value and the second preset value, thereby improving the safety of HVAC equipment 100. This control method for HVAC equipment 100 does not require the use of a refrigerant sensor, thereby reducing the manufacturing cost of HVAC equipment 100.

[0149] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A heating and ventilation equipment, wherein: 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, wherein: The housing comprises: A shell body, wherein the shell body has a receiving space; a first partition, 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; The second partition is arranged 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, wherein: 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 1 or 2, wherein: The first partition is an integrated structure; And / or, the second partition is an integrated structure.

5. The HVAC equipment according to claim 1 or 2, wherein: 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 shell body The inner walls are connected to form the second space.

6. The HVAC equipment according to any one of claims 1 to 5, wherein: The heat exchange tube is sealed and connected to the penetration hole.

7. The HVAC equipment according to any one of claims 1 to 6, wherein: 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 any one of claims 1 to 7, wherein: 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, wherein: At least one communication hole is formed on the shell, and the second space is connected to the outside through the at least one communication hole.

10. The HVAC equipment according to any one of claims 1 to 9, wherein: 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 10, wherein: 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 for controlling a HVAC device being implemented by the HVAC device according to any one of claims 1 to 11, wherein: 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 the 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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