Heat exchanger assembly, air conditioner and control method

Abstract

The invention provides a heat exchanger assembly, an air conditioner and a control method, the heat exchanger assembly comprises an evaporator assembly and a surface air cooler assembly, a refrigerant is introduced into a heat exchange pipe of the evaporator assembly, chilled water is introduced into a heat exchange pipe of the surface air cooler assembly, and the evaporator assembly and the surface air cooler assembly are connected into a whole. The evaporator assembly is located at the upstream position of the surface air cooler assembly in the air flowing direction, when chilled water is mainly used for refrigeration, the surface air cooler assembly works, the evaporator assembly does not work, and air passes through the evaporator assembly to be not cooled and then passes through the surface air cooler assembly to be cooled. According to the air conditioner, the refrigeration effect cannot become poor under the condition that the energy efficiency and the refrigeration performance are considered at the same time, and the needed refrigeration effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a heat exchanger component, an air conditioner and a control method. Background Art

[0002] The dual-cold source room dedicated air conditioning unit provides functions such as air circulation, air circulation, air filtration, cooling, reheating, and humidity control for computer rooms, switch rooms, data rooms, transmission rooms, power rooms, electronic rooms, electronic equipment rooms, etc., to ensure that the equipment environment meets normal use requirements. In the prior art, refrigerant refrigeration has excellent refrigeration effect but high energy consumption, while chilled water refrigeration has low energy consumption but the refrigeration effect is not ideal in some cases. Faced with the increasing refrigeration requirements of data centers, the refrigeration equipment in the prior art cannot take into account both energy efficiency and refrigeration performance, and the refrigeration effect is deteriorating.

[0003] Since the air conditioning and refrigeration equipment in the prior art has technical problems such as being unable to take into account both energy efficiency and refrigeration performance at the same time and having a deteriorated refrigeration effect, the present invention studies and designs a heat exchanger assembly, an air conditioner and a control method. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the air-conditioning refrigeration equipment in the prior art that it is impossible to take into account both energy efficiency and refrigeration performance at the same time and the refrigeration effect is deteriorated, thereby providing a heat exchanger assembly, an air conditioner and a control method.

[0005] In order to solve the above problems, the present invention provides a heat exchanger assembly, which includes:

[0006] An evaporator assembly and a surface cooler assembly, wherein refrigerant is passed through the heat exchange tubes of the evaporator assembly so that the air can exchange heat with the refrigerant when passing through the evaporator assembly, and chilled water is passed through the heat exchange tubes of the surface cooler assembly so that the air can exchange heat with the chilled water when passing through the surface cooler assembly. The evaporator assembly and the surface cooler assembly are connected as a whole, and the evaporator assembly is located upstream of the surface cooler assembly along the air flow direction. When chilled water cooling is mainly used, the surface cooler assembly works but the evaporator assembly does not work, and the air first passes through the evaporator assembly without being cooled and then passes through the surface cooler assembly to be cooled.

[0007] In some embodiments,

[0008] When refrigerant cooling is mainly used, the surface cooler component does not work but the evaporator component works, the air first passes through the evaporator component to be cooled and then passes through the surface cooler component without being cooled, and at the same time, the refrigerant flow rate or flow velocity flowing through the evaporator component can be adjusted.

[0009] In some embodiments,

[0010] The evaporator component is a plate-type structure, and the surface cooler component is also a plate-type structure. There is a gap greater than 0 between the evaporator component and the surface cooler component.

[0011] In some embodiments,

[0012] The size of the gap is 15 mm ± 5 mm.

[0013] In some embodiments,

[0014] There are at least two evaporator assemblies, including a first evaporator assembly and a second evaporator assembly, and there are at least two cooler assemblies, including a first cooler assembly and a second cooler assembly. The first evaporator assembly and the first cooler assembly are assembled into one body to form a first group of heat exchange assemblies; the second evaporator assembly and the second cooler assembly are assembled into one body to form a second group of heat exchange assemblies;

[0015] It also includes an electrical box, and the first group of heat exchange components and the second group of heat exchange components are spaced to form a storage space so as to accommodate the electrical box therein. The first evaporator component is far away from the storage space relative to the first surface cooler component, and the second evaporator component is far away from the storage space relative to the second surface cooler component. The air on one side of the first group of heat exchange components flows from the first evaporator component through the first surface cooler component and then enters the storage space, and the air on one side of the second group of heat exchange components flows from the second evaporator component through the second surface cooler component and then enters the storage space.

[0016] In some embodiments,

[0017] The first cooler assembly is opposite to the second cooler assembly and the accommodation space is sandwiched therebetween. The distance between the first cooler assembly and the second cooler assembly along the horizontal direction gradually increases from top to bottom, forming a structure in which the horizontal cross-sectional area of ​​the accommodation space is small at the top and large at the bottom.

[0018] In some embodiments,

[0019] The leeward side of the first cooler component faces the accommodating space, and the leeward side of the second cooler component faces the accommodating space. The leeward side of the first cooler component forms an inclined angle greater than 0 and less than 90° with the horizontal plane, and the leeward side of the second cooler component forms an inclined angle greater than 0 and less than 90° with the horizontal plane. From bottom to top, the leeward side of the first cooler component gradually extends toward the leeward side of the second cooler component, and the leeward side of the second cooler component gradually extends toward the leeward side of the first cooler component, so that in the longitudinal cross-section, the leeward side of the first cooler component and the leeward side of the second cooler component form a triangle or trapezoidal structure that is small at the top and large at the bottom.

[0020] In some embodiments,

[0021] When the evaporator assembly is a plate structure and the surface cooler assembly is also a plate structure, the first evaporator assembly, the second evaporator assembly, the first surface cooler assembly and the second surface cooler assembly are all plate structures, the leeward side of the first surface cooler assembly is parallel to the windward side of the first surface cooler assembly, the leeward side of the second surface cooler assembly is parallel to the windward side of the second surface cooler assembly, the leeward side of the first evaporator assembly is parallel to the windward side of the first evaporator assembly, the leeward side of the second evaporator assembly is parallel to the windward side of the second evaporator assembly, and the leeward side of the first evaporator assembly is opposite and parallel to the windward side of the first surface cooler assembly, with a gap greater than 0 between them, and the leeward side of the second evaporator assembly is opposite and parallel to the windward side of the second surface cooler assembly, with a gap greater than 0 between them.

[0022] In some embodiments,

[0023] The air outlet of the accommodation space is at least located at the bottom end thereof, so that the airflow entering the accommodation space is discharged from the bottom end of the accommodation space;

[0024] A front door panel is also provided in the accommodation space, and the electrical appliance box is arranged in close contact with the front door panel and is located outside the front door panel, that is, the electrical appliance box is far away from the center of the accommodation space relative to the front door panel.

[0025] The present invention also provides an air conditioner, which comprises the aforementioned heat exchanger assembly.

[0026] The present invention also provides a control method for the heat exchanger assembly as described above, comprising:

[0027] Determine whether to use chilled water cooling as the main method, refrigerant cooling as the main method, or both chilled water cooling and refrigerant cooling at the same time according to the demand;

[0028] The control step comprises the following steps: when chilled water cooling is required as the main cooling method, the surface cooler assembly is controlled to work, and the evaporator assembly is controlled not to work; when refrigerant cooling is required as the main cooling method, the evaporator assembly is controlled to work, and the surface cooler assembly is controlled not to work, and the variable frequency compressor connected to the evaporator assembly is controlled to be adjusted at the same time; when refrigerant cooling and chilled water cooling are required to be operated at the same time, the evaporator assembly and the surface cooler assembly are controlled to work at the same time.

[0029] A heat exchanger assembly, an air conditioner and a control method provided by the present invention have the following beneficial effects:

[0030] 1. The present invention connects the evaporator assembly and the surface cooler assembly as a whole, and can select whether to use chilled water cooling or refrigerant cooling as the main cooling according to needs or conditions such as the temperature of the chilled water. When the chilled water cooling is mainly used, the evaporator is turned off, which can reduce the energy consumption required for refrigerant cooling while providing cooling, thereby improving the energy efficiency of the system. In addition, when, for example, the chilled water temperature is too high to meet the cooling requirements, the refrigerant cooling can be used as the main cooling. At this time, the surface cooler is turned off, and the required cooling capacity and temperature in the room can be met by refrigerant cooling, which can simultaneously take into account energy efficiency and cooling performance; and because the evaporator assembly is arranged along the air flow direction at the surface cooler The upstream position of the condenser component allows the air to pass through the evaporator component first and then through the surface cooler component. When the chilled water is used mainly, the evaporator can be turned off, and the air flowing through the evaporator is not refrigerated. The air after passing through the evaporator enters the surface cooler and is cooled by the chilled water, which will not cause the air temperature to rise (if the air flows through the surface cooler first and then through the evaporator, the air is cooled by the surface cooler first, but when entering the evaporator, the evaporator is not working, and the temperature of its heat exchange tube is higher than the temperature of the air after being cooled by the surface cooler, which will cause the air to be heated without reason, making the cooling effect worse). Therefore, it is possible to take into account both energy efficiency and cooling performance and ensure the cooling effect of the system.

[0031] 2. When the heat exchanger assembly of the present invention is mainly used for refrigerant cooling, the air is first cooled by the refrigerant through the evaporator, and then heated by the heat exchanger when entering the surface cooler. At this time, the refrigerant flow rate or flow velocity of the evaporator assembly is adjusted to increase the cooling capacity of the evaporator, thereby ensuring that the air after passing through the surface cooler can meet the required indoor temperature and will not cause the cooling effect to deteriorate. Therefore, the present invention arranges the evaporator upstream of the surface cooler along the air flow, and the evaporator can be adjusted when the refrigerant cooling is mainly used, so that various refrigeration modes based on chilled water and refrigerant can all guarantee the cooling effect, and the cooling effect will not be deteriorated while taking into account both energy efficiency and refrigeration performance, thereby ensuring the required cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a front structural diagram of a heat exchanger assembly of the present invention;

[0033] Figure 2 is a schematic structural diagram of a heat exchanger assembly of the present invention showing a gap;

[0034] Figure 3 is a schematic structural diagram of the heat exchanger assembly of the present invention showing the air flow direction (wind direction);

[0035] Figure 4 It is a schematic diagram of the explosion structure of the heat exchanger assembly of the present invention with the electrical box removed;

[0036] Figure 5 yes Figure 4 Structural diagram of the front door panel in .

[0037] The reference numerals are:

[0038] 1. Evaporator assembly; 11. First evaporator assembly; 12. Second evaporator assembly; 2. Radiator assembly; 21. First radiator assembly; 22. Second radiator assembly; 3. Accommodation space; 4. Electrical box; 5. Front door panel; 6. Gap; 7. Fins. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] like Figure 1-5As shown, the present invention provides a heat exchanger assembly, which includes:

[0046] The evaporator component 1 and the cooler component 2, the refrigerant is passed through the heat exchange tube of the evaporator component 1, so that the air can exchange heat with the refrigerant when passing through the evaporator component 1, and the chilled water is passed through the heat exchange tube of the cooler component 2, so that the air can exchange heat with the chilled water when passing through the cooler component 2. The evaporator component 1 and the cooler component 2 are connected as a whole, and the evaporator component 1 is located at the upstream position of the cooler component 2 along the air flow direction. When the chilled water cooling is mainly used, the cooler component 2 works and the evaporator component 1 does not work, and the air first passes through the evaporator component 1 without being cooled and then passes through the cooler component 2 to be cooled.

[0047] The two different refrigeration methods in the prior art use different structures, and it is difficult to place them in the same space for use during the structural combination process. The present invention connects the evaporator assembly and the surface cooler assembly into one, and can choose whether to use chilled water refrigeration or refrigerant refrigeration as the main method according to needs or conditions such as the temperature of the chilled water. When the chilled water refrigeration is used as the main method, the evaporator is turned off, which can reduce the energy consumption required for refrigerant refrigeration while providing refrigeration, thereby improving the energy efficiency of the system. Refrigerant refrigeration can also be used as the main method when, for example, the chilled water temperature is too high to meet the refrigeration needs. At this time, the surface cooler is turned off, and the refrigerant refrigeration can meet the required indoor cooling capacity and temperature, thereby taking into account both energy efficiency and refrigeration performance; and Since the evaporator assembly is arranged to be located upstream of the surface cooler assembly along the air flow direction, the air first passes through the evaporator assembly and then through the surface cooler assembly. When chilled water is used mainly, the evaporator can be turned off, and the air flowing through the evaporator is not cooled. The air after passing through the evaporator then enters the surface cooler and is cooled by chilled water, which will not cause the air temperature to rise (if the air first passes through the surface cooler and then through the evaporator, the air is first cooled by the surface cooler, but when entering the evaporator, the evaporator is not working, and the temperature of its heat exchange tube is higher than the temperature of the air after being cooled by the surface cooler, which will cause the air to be heated without reason, making the cooling effect worse). Therefore, it is possible to take into account both energy efficiency and cooling performance and ensure the cooling effect of the system.

[0048] In some embodiments,

[0049] When the refrigerant is used mainly for cooling, the surface cooler assembly 2 does not work but the evaporator assembly 1 works, the air first passes through the evaporator assembly 1 to be cooled and then passes through the surface cooler assembly 2 without being cooled, and at the same time the refrigerant flow rate or flow velocity flowing through the evaporator assembly 1 can be adjusted.

[0050] When the present invention mainly uses refrigerant for cooling, the air is first cooled by the refrigerant through the evaporator, and then heated by the heat exchanger when entering the surface cooler. At this time, the refrigerant flow rate or flow velocity of the evaporator component is adjusted to increase the cooling capacity of the evaporator, thereby ensuring that the air after passing through the surface cooler can meet the required indoor temperature and will not cause the cooling effect to deteriorate. Therefore, the present invention arranges the evaporator upstream of the surface cooler along the air flow, and the evaporator can be adjusted when the refrigerant cooling is mainly used, so that various refrigeration modes based on chilled water and refrigerant can all guarantee the cooling effect, and the cooling effect will not be deteriorated while taking into account both energy efficiency and refrigeration performance, thereby ensuring the required cooling effect.

[0051] In some embodiments,

[0052] The evaporator component 1 is a plate-type structure, and the surface cooler component 2 is also a plate-type structure. There is a gap greater than 0 between the evaporator component 1 and the surface cooler component 2.

[0053] This is the preferred structural form of the evaporator assembly and the surface cooler assembly of the present invention. Setting a gap greater than 0 between the two can effectively prevent air congestion when flowing between the evaporator assembly and the surface cooler assembly, thereby solving the problem of air blockage in the unit.

[0054] In some embodiments,

[0055] The size of the gap is 15 mm ± 5 mm.

[0056] When assembling the evaporator assembly and the surface cooler assembly of the present invention, there is preferably a gap of 15±5mm in the middle. Structurally: the evaporator assembly and the surface cooler assembly are composed of pieces of aluminum foil stacked together to form fins, which are passed through a long copper tube. The distance between each aluminum foil is the sheet spacing. The pipeline refrigeration transfers the temperature to the aluminum foil, and then the wind passes through the gap between the aluminum foils to achieve refrigeration. The sheet spacing is usually between 1.2mm and 2.8mm, and 1.4mm, 1.8mm, 2mm, etc. are commonly used. The sheet spacing is very small, which makes it very easy to misalign the evaporator assembly and the surface cooler assembly when assembling. If they are assembled completely without gaps, theoretically, the aluminum foil of the evaporator assembly is opposite to the aluminum foil of the surface cooler assembly, and the gap between the aluminum foils of the evaporator assembly corresponds to the gap between the aluminum foils of the surface cooler assembly. In this way, the wind can pass through the evaporator assembly and the surface cooler assembly normally to achieve refrigeration. However, the number of aluminum foils is usually several hundred to thousands, and it is easy for the aluminum foil of the evaporator assembly to correspond to the gap of the aluminum foil of the surface cooler assembly, so that wind cannot pass through normally, resulting in a significant decrease in the cooling effect. Therefore, the present invention can further effectively prevent the evaporator assembly and the surface cooler assembly from being blocked by air by increasing the gap size between the evaporator assembly and the surface cooler assembly to 15±5mm (preferably, the minimum gap size for multiple products can meet 15±5mm).

[0057] In some embodiments,

[0058] The evaporator assembly 1 is at least two, including a first evaporator assembly 11 and a second evaporator assembly 12, and the cooler assembly 2 is at least two, including a first cooler assembly 21 and a second cooler assembly 22. The first evaporator assembly 11 and the first cooler assembly 21 are assembled into one body to form a first group of heat exchange assemblies; the second evaporator assembly 12 and the second cooler assembly 22 are assembled into one body to form a second group of heat exchange assemblies;

[0059] It also includes an electrical box 4, and the first group of heat exchange components and the second group of heat exchange components are spaced to form a storage space 3 so as to accommodate the electrical box 4 therein, the first evaporator component 11 is away from the storage space 3 relative to the first surface cooler component 21, and the second evaporator component 12 is away from the storage space 3 relative to the second surface cooler component 22, the air on one side of the first group of heat exchange components flows from the first evaporator component 11 through the first surface cooler component 21 and then enters the storage space 3, and the air on one side of the second group of heat exchange components flows from the second evaporator component 12 through the second surface cooler component 22 and then enters the storage space 3.

[0060] The present invention sets at least two evaporator components and at least two surface cooler components, and the first evaporator component and the first surface cooler component are assembled into one to form a first group of heat exchange components, and the second evaporator component and the second surface cooler component are assembled into one to form a second group of heat exchange components, and a storage space is formed between the two heat exchange group components, and the electrical box is placed at the position of the storage space, and the air flow flows from the first evaporator component on the outside through the first surface cooler component and enters the storage space, and at the same time flows from the second evaporator component on the outside through the second surface cooler component and enters the storage space, and heat is exchanged with the electrical box, thereby achieving the effect of cooling the electrical box and solving the problem of heat dissipation of the electrical box, and the electrical box is set at the position of the storage space, which effectively utilizes and saves space, makes the structure more compact, and can be more miniaturized.

[0061] In some embodiments,

[0062] The first cooler assembly 21 and the second cooler assembly 22 are opposite to each other with the accommodating space 3 sandwiched therebetween. The distance between the first cooler assembly 21 and the second cooler assembly 22 along the horizontal direction gradually increases from top to bottom, forming a structure in which the horizontal cross-sectional area of ​​the accommodating space 3 is small at the top and large at the bottom.

[0063] The present invention further increases the horizontal distance between the first and second surface cooler assemblies gradually from top to bottom, thereby forming a accommodating space that is smaller at the top and larger at the bottom, so that the heat exchange assemblies on both sides can be firmly supported on the ground or the bottom plate of the air conditioner, ensuring the structural stability of the refrigeration equipment, avoiding shaking during operation, and solving the stability problem of the coordination between the evaporator assembly and the surface cooler assembly of the computer room air conditioner.

[0064] In some embodiments,

[0065] The leeward side of the first cooler component 21 faces the accommodating space 3, and the leeward side of the second cooler component 22 faces the accommodating space 3. The leeward side of the first cooler component 21 forms an inclined angle greater than 0 and less than 90° with the horizontal plane, and the leeward side of the second cooler component 22 forms an inclined angle greater than 0 and less than 90° with the horizontal plane, and from bottom to top, the leeward side of the first cooler component 21 gradually extends toward the leeward side of the second cooler component 22, and the leeward side of the second cooler component 22 gradually extends toward the leeward side of the first cooler component 21, so that in the longitudinal cross-section, the leeward side of the first cooler component 21 and the leeward side of the second cooler component 22 form a triangle or trapezoidal structure with a small top and a large bottom.

[0066] This is a further preferred structural form of the first surface cooler assembly and the second surface cooler assembly of the present invention, that is, the two leeward surfaces thereof extend in a manner gradually approaching each other from bottom to top, effectively forming a triangular or trapezoidal structure that is small on the top and large on the bottom, thereby further effectively ensuring the structural stability of the refrigeration equipment, avoiding shaking during operation, and solving the stability problem of the coordination between the evaporator assembly and the surface cooler assembly of the computer room air conditioner.

[0067] The two device components (evaporator + cooler) of the present invention preferably adopt an inverted triangle structure design, which is assembled by two evaporator components and two cooler components. Since the four components are installed together, the weight is huge. The inverted triangle method can effectively maintain the support of the heavy two device components, strengthen the structure, and enable it to maintain a stable shape during transportation.

[0068] In some embodiments,

[0069] When the evaporator component 1 is a plate structure and the cooler component 2 is also a plate structure, the first evaporator component 11, the second evaporator component 12, the first cooler component 21 and the second cooler component 22 are all plate structures, the leeward side of the first cooler component 21 is parallel to the windward side of the first cooler component 21, the leeward side of the second cooler component 22 is parallel to the windward side of the second cooler component 22, the leeward side of the first evaporator component 11 is parallel to the windward side of the first evaporator component 11, the leeward side of the second evaporator component 12 is parallel to the windward side of the second evaporator component 12, and the leeward side of the first evaporator component 11 is opposite and parallel to the windward side of the first cooler component 21, with a gap greater than 0 between them, and the leeward side of the second evaporator component 12 is opposite and parallel to the windward side of the second cooler component 22, with a gap greater than 0 between them.

[0070] This is a further preferred structural form of the first and second evaporator components and the first and second surface cooler components of the present invention, that is, they are preferably all plate heat exchanger structures, the windward side and leeward side of the evaporator component are preferably parallel to each other, the windward side and leeward side of the surface cooler component are preferably parallel to each other, and the leeward side of the first evaporator component is opposite and parallel to the windward side of the first surface cooler, and the two have a gap greater than 0, whether they can effectively prevent wind blockage, the leeward side of the second evaporator component is opposite and parallel to the windward side of the second surface cooler, and the two have a gap greater than 0, whether they can effectively prevent wind blockage.

[0071] In some embodiments,

[0072] The air outlet of the accommodating space 3 is at least located at the bottom end thereof, so that the airflow entering the accommodating space 3 is discharged from the bottom end of the accommodating space;

[0073] A front door panel 5 is also provided in the accommodation space 3 , and the electrical box 4 is fitted with the front door panel 5 and is located outside the front door panel 5 , that is, the electrical box 4 is away from the center of the accommodation space 3 relative to the front door panel 5 .

[0074] The air outlet of the storage space of the present invention is preferably arranged at its bottom end, so that the air flow can pass through the evaporator and / or the surface cooler for heat exchange, then enter the storage space to dissipate heat and cool the electrical box, and then be discharged through the air outlet at the bottom end. The present invention preferably provides a front door panel (or front panel), and the electrical box can be installed on the front door panel, thereby being arranged in the storage space.

[0075] The two-device component of the present invention is preferably designed with a position for installing an electrical box 4 on the front (which also belongs to the position of the accommodating space and is located directly in front of the accommodating space), and the electrical box 4 is installed directly in front of the two-device component. The electrical box 4 uses sheet metal as a carrier, and the electrical components are installed on the sheet metal of the front door panel 5. The electrical box is installed by utilizing the space of the two-device component in an inlay manner, which effectively saves space. The electrical box 4 uses sheet metal as a carrier, and the electrical components are installed on the sheet metal. The electrical components generate heat, and the sheet metal is easy to conduct heat. The electrical box 4 is in contact with the front door panel 5 of the two-device component, and the two-device component simultaneously cools the electrical box 4 to prevent the electrical components from overheating. In order to prevent the low temperature on the front door panel 5 of the two devices from contacting with the hot air outside to produce condensation, sponges need to be added to the front panels of the two devices.

[0076] The present invention also provides an air conditioner, which comprises the aforementioned heat exchanger assembly.

[0077] 1. The surface cooler and the evaporator of the present invention are connected as one body to realize the combination of refrigerant refrigeration and chilled water refrigeration, solving the problem of combining refrigerant refrigeration and chilled water refrigeration in the computer room air conditioner;

[0078] 2. A gap of ≥15 mm is provided between the evaporator assembly and the surface cooler assembly of the present invention to solve the problem of air blocking when the evaporator assembly and the surface cooler assembly of the computer room air conditioner are combined;

[0079] 3. In the present invention, an electrical box is arranged in the accommodation space between the two device components to solve the problem of heat dissipation of the electrical box and the problem of large space.

[0080] 4. The present invention preferably forms an inverted triangle structure (preferably with the evaporator assembly inside and the surface cooler assembly outside) to achieve stability during transportation and solve the problem of unstable coordination between the evaporator assembly and the surface cooler assembly of the computer room air conditioner.

[0081] The present invention also provides a control method for the heat exchanger assembly as described above, comprising:

[0082] Determine whether to use chilled water cooling as the main method, refrigerant cooling as the main method, or both chilled water cooling and refrigerant cooling at the same time according to the demand;

[0083] The control step is as follows: when chilled water cooling is required as the main cooling method, the surface cooler component 2 is controlled to work, and the evaporator component 1 is controlled not to work; when refrigerant cooling is required as the main cooling method, the evaporator component 1 is controlled to work, and the surface cooler component 2 is controlled not to work, and the variable frequency compressor connected to the evaporator component 1 is controlled to be adjusted; when refrigerant cooling and chilled water cooling are required to be operated at the same time, the evaporator component 1 and the surface cooler component 2 are controlled to work at the same time.

[0084] The two different cooling methods in the prior art use different structures, and it is difficult to place them in the same space for use during the structural combination process. The present invention connects the evaporator assembly and the surface cooler assembly into one, and can choose whether to use chilled water cooling or refrigerant cooling as the main cooling method according to needs or conditions such as the temperature of the chilled water. When the chilled water cooling method is used as the main cooling method, the evaporator is turned off, which can reduce the energy consumption required for refrigerant cooling while providing cooling, thereby improving the energy efficiency of the system. Refrigerant cooling can also be used as the main cooling method when, for example, the chilled water temperature is too high to meet the cooling needs. At this time, the surface cooler is turned off, and the refrigerant cooling can be used to meet the required cooling capacity and temperature in the room, thereby taking into account both energy efficiency and cooling performance. Moreover, since the evaporator assembly is arranged to be located upstream of the surface cooler assembly along the air flow direction, the air first passes through the evaporator assembly and then passes through the surface cooler assembly. When the chilled water cooling method is used as the main cooling method, the evaporator can be turned off, and the air flowing through the evaporator is not cooled. The air after passing through the evaporator enters the surface cooler and is cooled by the chilled water, which does not cause the air temperature to rise. High (if the air first flows through the surface cooler and then through the evaporator, the air is cooled by the surface cooler first, but when entering the evaporator, the evaporator is not working, and the temperature of its heat exchange tube is higher than the temperature of the air after being cooled by the surface cooler, which will cause the air to be heated unnecessarily, making the refrigeration effect worse); when refrigerant refrigeration is mainly used, the air is first cooled by the refrigerant through the evaporator, and then when entering the surface cooler, it will be heated by the heat exchanger therein. At this time, the refrigerant flow rate or flow rate of the evaporator component is adjusted (achieved by frequency adjustment of the variable frequency compressor) to increase the refrigeration capacity of the evaporator, thereby ensuring that the air after passing through the surface cooler can meet the required indoor temperature and will not cause the refrigeration effect to deteriorate; therefore, the present invention arranges the evaporator upstream of the surface cooler along the air flow, and the evaporator can be adjusted when the refrigerant refrigeration is mainly used (frequency adjustment of the variable frequency compressor), so that a variety of refrigeration modes based on chilled water and refrigerant can ensure the refrigeration effect, and the refrigeration effect will not be deteriorated while taking into account both energy efficiency and refrigeration performance, thereby ensuring the required refrigeration effect.

[0085] The evaporator assembly 1 of the present invention is cooled by a refrigerant, i.e., a coolant. The surface cooler assembly 2 is cooled by chilled water. Refrigerant cooling and chilled water cooling are combined. Double refrigeration can greatly improve the refrigeration effect. And the two refrigeration methods can be cooled separately, that is, the refrigeration methods can be switched to cope with the situations faced by different environments. At the same time, backup refrigeration solutions can be provided to each other. When one of the refrigeration cycles cannot operate, the other refrigeration method can still ensure the refrigeration effect. For a precision data center such as a computer room, no refrigeration will have a huge side effect on the computer room, so the normal operation of the computer room can be guaranteed to a great extent and the loss can be reduced.

[0086] The installation form of the two device components of the present invention is that the middle two are the surface cooler components, which are in a triangular shape. The two outer sides are evaporator components 1, which are respectively connected to the two sides of the surface cooler component 2. When the unit is mainly chilled water, the evaporator component 1 is outside and the surface cooler component 2 is inside. The wind first passes through the evaporator component 1 and then passes through the surface cooler component 2 to ensure that the wind enters the wind cavity as soon as possible after cooling to ensure the maximum cooling effect. The evaporator component 1 is a compressor that compresses the refrigerant cycle, and the surface cooler component 2 is a chilled water cycle. When chilled water is mainly used, the cold air should be sent out as soon as possible after passing through the chilled water surface cooler component 2. If the evaporator component 1 is inside and the surface cooler component 2 is outside, the cold air will exchange heat with the evaporator component 1 at the same room temperature after passing through the surface cooler component 2, causing the temperature to rise, thereby causing the cooling effect to deteriorate. When refrigerant is used as the main component, although there will still be the problem that the cold air will exchange heat again with the surface cooler component 2 at the same room temperature after passing through the evaporator component 1, the refrigerant refrigeration is regulated by the variable frequency compressor and the refrigeration effect will not be deteriorated.

[0087] There are three situations when the two device components of the present invention are in operation, namely, the evaporator assembly 1 and the surface cooler assembly 2 are in operation at the same time, the evaporator assembly 1 is in operation alone, and the surface cooler assembly 2 is in operation alone. The first situation: when they are in operation at the same time, the refrigeration effect of the two device components is the maximum state. It is usually used in refrigeration environments with high requirements and large cooling capacity. When only the evaporator assembly 1 is in operation alone, it is usually used in places where the ambient temperature is changeable and the refrigeration requirements are high, and the two devices that need to be adjusted by the compressor control the ambient temperature. When only the surface cooler assembly 2 is in operation alone, it is usually used in places where the ambient temperature is relatively constant and only a fixed temperature is cooled. Since chilled water refrigeration only needs to control the water valve switch to achieve the refrigeration effect, and under normal circumstances the environment in the computer room is stable and the refrigeration requirements are low, usually chilled water refrigeration is set up in the computer room as the main priority, which can effectively reduce costs.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A heat exchanger assembly, characterized in that: include: An evaporator component (1) and a cooler component (2), wherein a refrigerant is passed through the heat exchange tube of the evaporator component (1) so that the air can exchange heat with the refrigerant when passing through the evaporator component (1), and chilled water is passed through the heat exchange tube of the cooler component (2) so that the air can exchange heat with the chilled water when passing through the cooler component (2). The evaporator component (1) and the cooler component (2) are connected as a whole, and the evaporator component (1) is located upstream of the cooler component (2) along the air flow direction. When chilled water cooling is mainly used, the cooler component (2) works while the evaporator component (1) does not work, and the air first passes through the evaporator component (1) without being cooled and then passes through the cooler component (2) to be cooled.

2. The heat exchanger assembly according to claim 1, characterized in that: When the refrigerant is used as the main cooling method, the surface cooler component (2) does not work but the evaporator component (1) works, the air first passes through the evaporator component (1) to be cooled and then passes through the surface cooler component (2) without being cooled, and at the same time the flow rate or flow velocity of the refrigerant flowing through the evaporator component (1) can be adjusted.

3. The heat exchanger assembly according to claim 1 or 2, characterized in that: The evaporator component (1) is a plate-type structure, and the surface cooler component (2) is also a plate-type structure. There is a gap greater than 0 between the evaporator component (1) and the surface cooler component (2).

4. The heat exchanger assembly according to claim 3, characterized in that: The size of the gap is 15 mm ± 5 mm.

5. The heat exchanger assembly according to any one of claims 1 to 4, characterized in that: The evaporator components (1) are at least two, including a first evaporator component (11) and a second evaporator component (12); the cooler components (2) are also at least two, including a first cooler component (21) and a second cooler component (22); the first evaporator component (11) and the first cooler component (21) are assembled as a whole to form a first group of heat exchange components; the second evaporator component (12) and the second cooler component (22) are assembled as a whole to form a second group of heat exchange components; The invention also includes an electrical box (4), wherein the first group of heat exchange components and the second group of heat exchange components are spaced to form a storage space (3) so as to be able to accommodate the electrical box (4) therein; the first evaporator component (11) is away from the storage space (3) relative to the first cooler component (21); the second evaporator component (12) is away from the storage space (3) relative to the second cooler component (22); the air on one side of the first group of heat exchange components flows from the first evaporator component (11) through the first cooler component (21) and then enters the storage space (3); the air on one side of the second group of heat exchange components flows from the second evaporator component (12) through the second cooler component (22) and then enters the storage space (3).

6. The heat exchanger assembly according to claim 5, characterized in that: The first cooler assembly (21) and the second cooler assembly (22) are opposite to each other and the accommodation space (3) is sandwiched between the two. The distance between the first cooler assembly (21) and the second cooler assembly (22) in the horizontal direction gradually increases from top to bottom, forming a structure in which the horizontal cross-sectional area of ​​the accommodation space (3) is small at the top and large at the bottom.

7. The heat exchanger assembly according to claim 6, characterized in that: The leeward side of the first cooler assembly (21) faces the accommodating space (3), and the leeward side of the second cooler assembly (22) faces the accommodating space (3); the leeward side of the first cooler assembly (21) forms an inclined angle with a horizontal plane that is greater than 0 and less than 90°, and the leeward side of the second cooler assembly (22) forms an inclined angle with a horizontal plane that is greater than 0 and less than 90°, and from bottom to top, the leeward side of the first cooler assembly (21) gradually extends toward the leeward side of the second cooler assembly (22), and the leeward side of the second cooler assembly (22) gradually extends toward the leeward side of the first cooler assembly (21), so that in a longitudinal cross section, the leeward side of the first cooler assembly (21) and the leeward side of the second cooler assembly (22) form a triangle or trapezoidal structure that is smaller at the top and larger at the bottom.

8. The heat exchanger assembly according to claim 5, characterized in that: When the evaporator assembly (1) is a plate-type structure and the cooler assembly (2) is also a plate-type structure, the first evaporator assembly (11), the second evaporator assembly (12), the first cooler assembly (21) and the second cooler assembly (22) are all plate-type structures, the leeward side of the first cooler assembly (21) is parallel to the windward side of the first cooler assembly (21), the leeward side of the second cooler assembly (22) is parallel to the windward side of the second cooler assembly (22), and the first evaporator assembly (11) is parallel to the windward side of the first cooler assembly (21). (11); the leeward side of the first evaporator component (11) is parallel to the windward side of the first evaporator component (11); the leeward side of the second evaporator component (12) is parallel to the windward side of the second evaporator component (12); the leeward side of the first evaporator component (11) is opposite to and parallel to the windward side of the first cooler component (21), with a gap greater than 0 between them; the leeward side of the second evaporator component (12) is opposite to and parallel to the windward side of the second cooler component (22), with a gap greater than 0 between them.

9. The heat exchanger assembly according to claim 5, characterized in that: The air outlet of the accommodating space (3) is at least located at the bottom end thereof, so that the airflow entering the accommodating space (3) is discharged from the bottom end of the accommodating space; A front door panel (5) is also provided in the accommodating space (3), and the electrical appliance box (4) is arranged in close contact with the front door panel (5) and is located on the outside of the front door panel (5), that is, the electrical appliance box (4) is located away from the center of the accommodating space (3) relative to the front door panel (5).

10. An air conditioner, characterized in that: A heat exchanger assembly comprising any one of claims 1-9.

11. A method for controlling a heat exchanger assembly according to any one of claims 1 to 9, characterized in that: include: Determine whether to use chilled water cooling as the main method, refrigerant cooling as the main method, or both chilled water cooling and refrigerant cooling at the same time according to the demand; The control step comprises: when chilled water cooling is required as the main cooling method, the surface cooler component (2) is controlled to work, while the evaporator component (1) is controlled not to work; when refrigerant cooling is required as the main cooling method, the evaporator component (1) is controlled to work, while the surface cooler component (2) is controlled not to work, and the variable frequency compressor connected to the evaporator component (1) is controlled to be adjusted; when refrigerant cooling and chilled water cooling are required to be operated simultaneously, the evaporator component (1) and the surface cooler component (2) are controlled to work simultaneously.

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