Heat exchanger assembly, air conditioner and control method

Abstract

The application provides a heat exchanger assembly, an air conditioner and a control method. The heat exchanger assembly comprises an evaporator assembly and a surface cooler assembly. Refrigerant is introduced into the heat exchange pipe of the evaporator assembly, and chilled water is introduced into the heat exchange pipe of the surface cooler assembly. The evaporator assembly and the surface cooler assembly are connected as a whole, and the evaporator assembly is located at an upstream position of the surface cooler assembly along the air flow direction. When refrigeration by chilled water is mainly used, the surface cooler assembly works and the evaporator assembly does not work. Air is first not cooled by the evaporator assembly and then cooled by the surface cooler assembly. According to the application, the refrigeration effect is not deteriorated under the condition that the energy efficiency and the refrigeration performance are simultaneously considered, and the required refrigeration effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a heat exchanger assembly, an air conditioner and a control method. BACKGROUND

[0002] The double-cold-source machine room special 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 supply rooms, electronic rooms, electronic equipment rooms, and the like, to ensure that the equipment environment meets the normal use requirements. In the prior art, the refrigerant refrigeration has excellent refrigeration effect but high energy consumption, and the chilled water refrigeration has low energy consumption but the refrigeration effect is not ideal in some cases. In the face of the increasingly high data center refrigeration requirements, the refrigeration equipment in the prior art cannot simultaneously consider energy efficiency and refrigeration performance and the refrigeration effect is poor.

[0003] Due to the technical problems that the air conditioning refrigeration equipment in the prior art cannot simultaneously consider energy efficiency and refrigeration performance and the refrigeration effect is poor, the present application researches and designs a heat exchanger assembly, an air conditioner and a control method. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects that the air conditioning refrigeration equipment in the prior art cannot simultaneously consider energy efficiency and refrigeration performance and the refrigeration effect is poor, thereby providing a heat exchanger assembly, an air conditioner and a control method.

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

[0006] An evaporator assembly and a surface cooler assembly, the heat exchange pipe of the evaporator assembly is connected with refrigerant, so that the air can exchange heat with the refrigerant when passing through the evaporator assembly, the heat exchange pipe of the surface cooler assembly is connected with chilled water, 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 at an upstream position of the surface cooler assembly along the air flow direction, when the chilled water refrigeration is mainly used, the surface cooler assembly works and the evaporator assembly does not work, the air is first cooled by the evaporator assembly and then cooled by the surface cooler assembly.

[0007] In some embodiments,

[0008] When the refrigerant refrigeration is mainly used, the surface cooler assembly does not work and the evaporator assembly works, the air is first cooled by the evaporator assembly and then not cooled by the surface cooler assembly, and the flow or flow rate of the refrigerant flowing through the evaporator assembly can be adjusted.

[0009] In some embodiments,

[0010] The evaporator assembly has a plate structure, the surface cooler assembly also has a plate structure, and there is a gap with a size greater than 0 between the evaporator assembly and the surface cooler assembly.

[0011] In some implementations...

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

[0013] In some implementations...

[0014] The evaporator assembly comprises at least two components, including a first evaporator assembly and a second evaporator assembly. The surface cooler assembly also comprises at least two components, including a first surface cooler assembly and a second surface cooler assembly. The first evaporator assembly and the first surface cooler assembly are assembled together to form a first heat exchange assembly. The second evaporator assembly and the second surface cooler assembly are assembled together to form a second heat exchange assembly.

[0015] It also includes an electrical box, in which the first set of heat exchange components and the second set of heat exchange components are spaced apart to form a receiving space to accommodate the electrical box. The first evaporator component is located away from the receiving space relative to the first surface cooler component, and the second evaporator component is located away from the receiving space relative to the second surface cooler component. Air from the first set of heat exchange components flows from the first evaporator component through the first surface cooler component and then enters the receiving space, and air from the second set of heat exchange components flows from the second evaporator component through the second surface cooler component and then enters the receiving space.

[0016] In some implementations...

[0017] The first surface cooler assembly and the second surface cooler assembly are opposite each other and the receiving space is sandwiched between them. The horizontal distance between the first surface cooler assembly and the second surface cooler assembly gradually increases from top to bottom, forming a structure in which the horizontal cross-sectional area of ​​the receiving space is smaller at the top and larger at the bottom.

[0018] In some implementations...

[0019] The leeward surface of the first surface condenser assembly faces the containing space, the leeward surface of the second surface condenser assembly faces the containing space, the leeward surface of the first surface condenser assembly is inclined to the horizontal plane by an angle greater than 0 and less than 90°, the leeward surface of the second surface condenser assembly is inclined to the horizontal plane by an angle greater than 0 and less than 90°, and from bottom to top, the leeward surface of the first surface condenser assembly gradually extends towards the leeward surface of the second surface condenser assembly, and the leeward surface of the second surface condenser assembly gradually extends towards the leeward surface of the first surface condenser assembly, so that in the longitudinal section, the leeward surface of the first surface condenser assembly and the leeward surface of the second surface condenser assembly form a triangular or trapezoidal structure with the top smaller and the bottom larger.

[0020] In some embodiments,

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

[0022] In some embodiments,

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

[0024] The containing space is further provided with a front door panel, and the electrical appliance box is arranged in close contact with the front door panel and located outside the front door panel, that is, the electrical appliance box is away from the central position of the containing space relative to the front door panel.

[0025] The application further provides an air conditioner comprising the heat exchanger assembly.

[0026] The application further provides a control method of the heat exchanger assembly, comprising:

[0027] The judging step judges whether the refrigeration is mainly by chilled water or mainly by refrigerant, or whether the refrigeration by chilled water and the refrigeration by refrigerant are simultaneously operated according to the demand;

[0028] The control step controls the surface cooler assembly to work and controls the evaporator assembly not to work when refrigeration by the chilled water is mainly required; controls the evaporator assembly to work and controls the surface cooler assembly not to work when refrigeration by the refrigerant is mainly required, and controls the variable frequency compressor connected with the evaporator assembly to adjust; controls the evaporator assembly and the surface cooler assembly to work simultaneously when refrigeration by the refrigerant and the chilled water is required to be simultaneously performed.

[0029] The heat exchanger assembly, the air conditioner and the control method have the following beneficial effects:

[0030] 1. The evaporator assembly and the surface cooler assembly are connected as a whole, and whether refrigeration by the chilled water or refrigeration by the refrigerant is mainly selected according to requirements or the temperature of the chilled water and other conditions. The evaporator is closed when refrigeration by the chilled water is mainly selected, the energy consumption required by refrigeration by the refrigerant is reduced, the energy efficiency of the system is improved, refrigeration by the refrigerant is mainly selected when the chilled water temperature is high and refrigeration cannot be satisfied, the surface cooler is closed at this time, refrigeration by the refrigerant is performed to satisfy the required cooling capacity and temperature in the room, the energy efficiency and the refrigeration performance are simultaneously considered, the evaporator assembly is arranged at an upstream position of the surface cooler assembly along the air flow direction, the air passes through the evaporator assembly and then passes through the surface cooler assembly, the evaporator is closed when refrigeration by the chilled water is mainly selected, the air passing through the evaporator is not cooled, the air after passing through the evaporator enters the surface cooler and is cooled by the chilled water, and the air temperature is not increased (if the air passes through the surface cooler and then passes through the evaporator, the air is cooled by the surface cooler, but when the air enters the evaporator, the heat exchange pipe temperature of the evaporator is higher than the air temperature after being cooled by the surface cooler, the air is heated without reason, and the refrigeration effect is poor), and therefore the energy efficiency, the refrigeration performance and the refrigeration effect of the system are simultaneously considered.

[0031] 2. When refrigeration by the refrigerant is mainly selected, the air is cooled by the refrigerant after passing through the evaporator, and the air is heated by the heat exchanger when the air enters the surface cooler, the refrigerant flow or flow rate of the evaporator assembly is adjusted at this time, the refrigeration capacity of the evaporator is increased, the air after passing through the surface cooler can satisfy the required temperature in the room, and the refrigeration effect is not poor, the evaporator is arranged at an upstream position of the surface cooler along the air flow, the evaporator can be adjusted when refrigeration by the refrigerant is mainly selected, refrigeration effects of various refrigeration modes of refrigeration by the chilled water and refrigeration by the refrigerant can be guaranteed, the refrigeration effect is not poor when the energy efficiency and the refrigeration performance are simultaneously considered, and the required refrigeration effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a front structure view of the heat exchanger assembly of the present application;

[0033] Figure 2 is a structure diagram of a heat exchanger assembly of the present application showing a gap;

[0034] Figure 3 is a structure diagram of a heat exchanger assembly of the present application showing an air flow direction (wind direction);

[0035] Figure 4 is an exploded structure diagram of a heat exchanger assembly of the present application with an electrical box removed;

[0036] Figure 5 is a structure diagram of a front door panel in Figure 4

[0037] The reference signs are shown as:

[0038] 1, evaporator assembly; 11, first evaporator assembly; 12, second evaporator assembly; 2, surface condenser assembly; 21, first surface condenser assembly; 22, second surface condenser assembly; 3, accommodation space; 4, electrical box; 5, front door panel; 6, gap; 7, fin. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be apparently and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work belong to the scope of protection of the present application.

[0040] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0041] ​The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full equivalents thereof.

[0042] In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings generally for the purpose of describing and simplifying the present application, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0043] For the purpose of description, spatial relative terms, such as "above", "upper", "up", "below", "lower", etc., can be used herein for describing the spatial relationship between one device or feature and another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the device described as "above" or "above" the other device or structure will be positioned "below" or "below" the other device or structure. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein should be interpreted accordingly.

[0044] In addition, it should be noted that the use of the terms "first", "second", etc. to describe various components is merely intended to distinguish one component from another, and does not have a special meaning unless otherwise stated, and therefore cannot be construed as limiting the scope of protection of the present application.

[0045] As Figures 1-5As shown, the present application provides a heat exchanger assembly, which comprises:

[0046] The evaporator assembly 1 and the surface cooler assembly 2, the heat exchange pipe of the evaporator assembly 1 is connected with refrigerant, so that the air can exchange heat with the refrigerant when passing through the evaporator assembly 1, the heat exchange pipe of the surface cooler assembly 2 is connected with chilled water, so that the air can exchange heat with the chilled water when passing through the surface cooler assembly 2, the evaporator assembly 1 and the surface cooler assembly 2 are connected as a whole, and the evaporator assembly 1 is located at the upstream position of the surface cooler assembly 2 along the air flow direction, when the refrigeration is mainly by chilled water, the surface cooler assembly 2 works and the evaporator assembly 1 does not work, the air first passes through the evaporator assembly 1 and is not cooled, and then passes through the surface cooler assembly 2 and is cooled.

[0047] The two different refrigeration modes in the prior art use different structures, which are difficult to be placed in a space at the same time during the structural combination. The present application connects the evaporator assembly and the surface cooler assembly as a whole, and can select whether to mainly use chilled water refrigeration or refrigerant refrigeration according to the needs or the temperature of the chilled water and other conditions. When mainly using chilled water refrigeration, the evaporator is closed, which can reduce the energy consumption required for refrigerant refrigeration and improve the energy efficiency of the system under the condition of providing refrigeration. In addition, when mainly using refrigerant refrigeration under the condition that the chilled water temperature is too high to meet the refrigeration, the surface cooler is closed, which can meet the required cooling capacity and temperature in the room through refrigerant refrigeration, and can simultaneously consider the energy efficiency and refrigeration performance. In addition, the evaporator assembly is arranged at the upstream position of the surface cooler assembly along the air flow direction, so that the air first passes through the evaporator assembly and then passes through the surface cooler assembly. When mainly using chilled water, the evaporator is closed, the air flowing through the evaporator is not cooled, and the air after flowing through the evaporator enters the surface cooler and is cooled by the chilled water, which will not cause the temperature of the air to rise (if the air first flows through the surface cooler and then flows through the evaporator, the air is cooled by the surface cooler first, but when it enters the evaporator, the temperature of the heat exchange pipe of the evaporator is higher than that of the air cooled by the surface cooler, which will cause the air to be heated unnecessarily and the refrigeration effect to be poor). Therefore, the energy efficiency and refrigeration performance can be simultaneously considered and the refrigeration effect of the system can be ensured.

[0048] In some embodiments,

[0049] When mainly using refrigerant refrigeration, the surface cooler assembly 2 does not work and the evaporator assembly 1 works, the air first passes through the evaporator assembly 1 and is cooled, and then passes through the surface cooler assembly 2 and is not cooled, and the flow or flow rate of the refrigerant flowing through the evaporator assembly 1 can be adjusted.

[0050] When refrigerant refrigeration is mainly used, the air is first cooled by the refrigerant in the evaporator, and then enters the surface cooler, which may be heated by the heat exchanger at this time. At this time, the refrigerant flow or flow rate of the evaporator assembly is adjusted to increase the refrigerating capacity of the evaporator, so that the air after passing through the surface cooler can meet the required temperature in the room, and the refrigeration effect will not be poor. Therefore, the evaporator is arranged upstream of the surface cooler along the air flow, and the evaporator can be adjusted when refrigerant refrigeration is mainly used. The refrigeration effect of various refrigeration modes mainly using chilled water and refrigerant can be ensured, and the refrigeration effect will not be poor while considering the energy efficiency and refrigeration performance. The required refrigeration effect is ensured.

[0051] In some embodiments,

[0052] The evaporator assembly 1 is a plate structure, the surface cooler assembly 2 is also a plate structure, and the gap between the evaporator assembly 1 and the surface cooler assembly 2 has a size greater than 0.

[0053] This is the preferred structure of the evaporator assembly and the surface cooler assembly of the present application. The gap between the two is greater than 0, which can effectively prevent air congestion when flowing between the evaporator assembly and the surface cooler assembly, and solve the problem of air blockage of the unit.

[0054] In some embodiments,

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

[0056] The evaporator assembly and the surface cooler assembly of the present application have a gap of 15±5mm in the middle when assembled. Structurally, the evaporator assembly and the surface cooler assembly are composed of a piece of aluminum foil stacked together to form fins, and a long copper pipe is passed through to form a piece. The distance between the aluminum foils is the fin pitch. The temperature is transmitted to the aluminum foil by the refrigeration pipeline, and then the air passes through the gap between the aluminum foils to achieve refrigeration. The fin pitch is usually between 1.2mm and 2.8mm, commonly used are 1.4mm, 1.8mm, 2mm, etc. The small fin pitch leads to the evaporator assembly and the surface cooler assembly being easily misaligned when assembled. If they are completely seamless, theoretically, the aluminum foil of the evaporator assembly corresponds 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 air can normally pass through the evaporator assembly and the surface cooler assembly to achieve refrigeration. However, the number of aluminum foils is usually several hundred to several thousand, 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 the air cannot normally pass through, resulting in a significant decrease in refrigeration effect. Therefore, the gap size between the evaporator assembly and the surface cooler assembly is increased to 15±5mm (preferably, the minimum gap size of multiple products can meet 15±5mm), which can further effectively prevent the evaporator assembly and the surface cooler assembly from being blocked.

[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 surface cooler assembly 2 is also at least two, including a first surface cooler assembly 21 and a second surface cooler assembly 22, the first evaporator assembly 11 is assembled with the first surface cooler assembly 21 as a whole to form a first group of heat exchange assemblies; the second evaporator assembly 12 is assembled with the second surface cooler assembly 22 as a whole to form a second group of heat exchange assemblies.

[0059] Further comprising an electrical appliance box 4, the first group of heat exchange assemblies and the second group of heat exchange assemblies are spaced apart to form a containing space 3 to accommodate the electrical appliance box 4, the first evaporator assembly 11 is away from the containing space 3 relative to the first surface cooler assembly 21, the second evaporator assembly 12 is away from the containing space 3 relative to the second surface cooler assembly 22, the air on one side of the first group of heat exchange assemblies enters the containing space 3 after flowing through the first surface cooler assembly 21 from the first evaporator assembly 11, and the air on one side of the second group of heat exchange assemblies enters the containing space 3 after flowing through the second surface cooler assembly 22 from the second evaporator assembly 12.

[0060] The present application sets the evaporator assembly to at least two, the surface cooler assembly to at least two, and the first evaporator assembly and the first surface cooler assembly are assembled as a whole to form a first group of heat exchange assemblies, and the second evaporator assembly and the second surface cooler assembly are assembled as a whole to form a second group of heat exchange assemblies, and the two heat exchange assemblies are spaced apart to form a containing space, and the electrical appliance box is placed in the containing space, the air flow enters the containing space after flowing through the first surface cooler assembly from the first evaporator assembly on the outside, and enters the containing space after flowing through the second surface cooler assembly from the second evaporator assembly on the outside, and exchanges heat with the electrical appliance box, thereby achieving the effect of cooling the electrical appliance box, solving the problem of heat dissipation of the electrical appliance box, and setting the electrical appliance box in the containing space, effectively utilizing and saving space, making the structure more compact, and the volume can be made more miniaturized.

[0061] In some embodiments,

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

[0063] The distance between the first and second surface cooler assemblies in the horizontal direction is gradually increased from top to bottom, thereby forming an accommodating space with a small top and a large 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 and other conditions during operation, and solving the stability problem of the cooperation of the evaporator assembly and the surface cooler assembly of the machine room air conditioner.

[0064] In some embodiments,

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

[0066] This is a further preferred structure of the first surface cooler assembly and the second surface cooler assembly of the present application, that is, the two leeward surfaces gradually approach each other from bottom to top, effectively forming a triangular or trapezoidal structure with a small top and a large bottom, thereby further effectively ensuring the structural stability of the refrigeration equipment, avoiding shaking and other conditions during operation, and solving the stability problem of the cooperation of the evaporator assembly and the surface cooler assembly of the machine room air conditioner.

[0067] The two-component part (evaporator + surface cooler) of the present application preferably adopts an inverted triangular structure design, which is assembled by two evaporator assemblies and two surface cooler assemblies. Since the four assemblies are installed together, the weight is huge. The inverted triangular way can effectively maintain the support of the two-component part with large weight, strengthen the structure, and maintain a stable form during transportation.

[0068] In some embodiments,

[0069] When the evaporator assembly 1 is a plate structure, the first evaporator assembly 11, the second evaporator assembly 12, the first surface cooler assembly 21 and the second surface cooler assembly 22 are all plate structures, the leeward surface of the first surface cooler assembly 21 is parallel to the windward surface of the first surface cooler assembly 21, the leeward surface of the second surface cooler assembly 22 is parallel to the windward surface of the second surface cooler assembly 22, the leeward surface of the first evaporator assembly 11 is parallel to the windward surface of the first evaporator assembly 11, the leeward surface of the second evaporator assembly 12 is parallel to the windward surface of the second evaporator assembly 12, and the leeward surface of the first evaporator assembly 11 is opposite and parallel to the windward surface of the first surface cooler assembly 21, and there is a gap with a size greater than 0 between the two, and the leeward surface of the second evaporator assembly 12 is opposite and parallel to the windward surface of the second surface cooler assembly 22, and there is a gap with a size greater than 0 between the two.

[0070] This is a further preferred structure of the first and second evaporator assemblies and the first and second surface cooler assemblies of the present application, i.e. the structure in which the first and second evaporator assemblies and the first and second surface cooler assemblies are all plate heat exchangers, the windward and leeward surfaces of the evaporator assemblies are preferably all parallel to each other, the windward and leeward surfaces of the surface cooler assemblies are preferably all parallel to each other, and the leeward surface of the first evaporator assembly is opposite and parallel to the windward surface of the first surface cooler, and there is a gap with a size greater than 0 between the two, which can effectively prevent the occurrence of wind blockage, and the leeward surface of the second evaporator assembly is opposite and parallel to the windward surface of the second surface cooler, and there is a gap with a size greater than 0 between the two, which can effectively prevent the occurrence of wind blockage.

[0071] In some embodiments,

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

[0073] The accommodation space 3 is further provided with a front door plate 5, and the electric appliance box 4 is arranged in close contact with the front door plate 5 and located on the outer side of the front door plate 5, i.e. the electric appliance box 4 is away from the center position of the accommodation space 3 relative to the front door plate 5.

[0074] The air outlet of the accommodation space of the present application is preferably arranged at the bottom end thereof, so that after the air flow passes through the evaporator and / or surface cooler heat exchanger and then enters the accommodation space to cool the electric appliance box, it is discharged through the air outlet at the bottom end. The present application preferably arranges a front door plate (or front panel), which can be used to mount the electric appliance box on the front door plate and thus arrange the electric appliance box in the accommodation space.

[0075] The two-component assembly of this invention preferably has a mounting position for the electrical box 4 on its front side (which is also part of the accommodating space, located directly in front of the accommodating space). The electrical box 4 is mounted on the front of the two-component assembly. The electrical box 4 uses sheet metal as a carrier to mount the electrical components onto the sheet metal of the front door panel 5. The electrical box is mounted using an inlay method within the space of the two-component assembly, effectively saving space. The electrical box 4 uses sheet metal as a carrier to mount the electrical components. The electrical components generate heat, and the sheet metal is a good conductor of heat. The electrical box 4 contacts the front door panel 5 of the two-component assembly, and the two-component assembly simultaneously cools and protects the electrical box 4, preventing the electrical components from overheating. To prevent condensation from forming on the low-temperature front door panel 5 of the two-component assembly due to contact with hot outside air, a sponge needs to be added to the front panel of the two-component assembly.

[0076] The present invention also provides an air conditioner that includes the aforementioned heat exchanger assembly.

[0077] 1. The present invention integrates the surface cooler and the evaporator to achieve a combination of refrigerant refrigeration and chilled water refrigeration, thereby solving the problem of combining refrigerant refrigeration and chilled water refrigeration in computer room air conditioning.

[0078] 2. The present invention provides a gap of ≥15mm between the evaporator assembly and the surface cooler assembly to solve the problem of air blockage caused by the combined evaporator assembly and surface cooler assembly of the computer room air conditioner;

[0079] 3. The present invention provides an electrical box within the accommodating space between the two components to solve the problem of heat dissipation of the electrical box and to address the issue of excessive space.

[0080] 4. The present invention preferably adopts an inverted triangular structure (preferably with the evaporator assembly inside and the surface cooler assembly outside) to achieve stability during transportation and solve the problem of unstable cooperation 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 a heat exchanger assembly as described above, comprising:

[0082] The judgment steps are to determine whether chilled water cooling, refrigerant cooling, or both chilled water cooling and refrigerant cooling are used simultaneously, based on the requirements.

[0083] The control steps are as follows: when chilled water cooling is required as the primary cooling method, the surface cooler assembly 2 is controlled to operate while the evaporator assembly 1 is controlled to operate; when refrigerant cooling is required as the primary cooling method, the evaporator assembly 1 is controlled to operate while the surface cooler assembly 2 is controlled to operate, and the variable frequency compressor connected to the evaporator assembly 1 is controlled to adjust accordingly; when both refrigerant cooling and chilled water cooling are required to operate simultaneously, the evaporator assembly 1 and the surface cooler assembly 2 are controlled to operate simultaneously.

[0084] The two different refrigeration modes in the prior art use different structures, which are difficult to be placed in a space at the same time during structural combination, and the evaporator assembly and the surface cooler assembly are connected as a whole in the present application, and whether refrigeration by refrigerated water or refrigeration by refrigerant can be selected according to the temperature of the refrigerated water and other conditions, the evaporator is closed when refrigeration by refrigerated water is mainly used, the energy consumption required for refrigeration by refrigerant can be reduced under the condition of providing refrigeration, the energy efficiency of the system is improved, refrigeration by refrigerant is mainly used when the refrigerated water temperature is too high to meet the refrigeration requirement, the surface cooler is closed at this time, refrigeration by refrigerant can meet the required cooling capacity and temperature in the room, and the energy efficiency and refrigeration performance can be considered at the same time; and since the evaporator assembly is arranged at an upstream position of the surface cooler assembly along the air flow direction, the air passes through the evaporator assembly and then passes through the surface cooler assembly, the evaporator is closed when refrigeration by refrigerated water is mainly used, the air flowing through the evaporator is not cooled, and the air after flowing through the evaporator enters the surface cooler and is cooled by the refrigerated water, so that the temperature of the air does not increase (if the air first flows through the surface cooler and then flows through the evaporator, the air is first cooled by the surface cooler, but when the air enters the evaporator, the temperature of the heat exchange pipe of the evaporator is higher than the temperature of the air cooled by the surface cooler, so that the air is heated unnecessarily, and the refrigeration effect is poor); and when refrigeration by refrigerant is mainly used, the air is first cooled by the refrigerant of the evaporator, and the air entering the surface cooler will be heated by the heat exchanger in the surface cooler, at this time, the refrigerant flow or flow rate of the evaporator assembly is adjusted (by frequency adjustment of the variable frequency compressor) to increase the refrigeration capacity of the evaporator, so that the air after passing through the surface cooler can meet the required temperature in the room, and the refrigeration effect is not poor; therefore, the evaporator is arranged upstream of the surface cooler along the air flow by the present application, and the evaporator can be adjusted (frequency adjustment of the variable frequency compressor) when refrigeration by refrigerant is mainly used, so that the refrigeration effect of various refrigeration modes of refrigeration by refrigerated water and refrigeration by refrigerant can be ensured, the refrigeration effect is not poor when the energy efficiency and refrigeration performance are considered at the same time, and the required refrigeration effect is ensured.

[0085] The evaporator assembly 1 of the present application is refrigerated by refrigerant, i.e. refrigerant. The surface cooler assembly 2 is refrigerated by refrigerated water. The refrigerant cooling and the refrigerated water cooling are combined. The double refrigeration can greatly improve the refrigeration effect. And the two refrigeration modes can be refrigerated alone, that is, the refrigeration mode can be switched to cope with different situations faced by different environments. At the same time, they can provide backup refrigeration schemes for each other, when one of the refrigeration cycles cannot run, the other refrigeration mode can still ensure the refrigeration effect. For such a precise data center place 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 greatly ensured, and the loss is reduced.

[0086] The installation form of the two-component of the application is that the middle two are the surface cooler assembly, in a triangular form. The outer two are the evaporator assembly 1, connected on both sides of the surface cooler assembly 2 respectively. When the unit is mainly with chilled water, the evaporator assembly 1 is outside, and the surface cooler assembly 2 is inside, the air first passes through the evaporator assembly 1 and then passes through the surface cooler assembly 2, to ensure that the cooled air enters the air cavity for the first time to maximize the cooling effect. The evaporator assembly 1 is circulated by the compressor compressed refrigerant, and the surface cooler assembly 2 is the chilled water circulation. When mainly with chilled water, the cooled air should be sent out for the first time after passing through the surface cooler assembly 2, if the evaporator assembly 1 is inside and the surface cooler assembly 2 is outside, the cooled air will be reheated with the evaporator assembly 1 at room temperature after passing through the surface cooler assembly 2, which will cause the temperature to rise, thereby causing the refrigeration effect to be poor. When mainly with refrigerant, although the cooled air will be reheated with the surface cooler assembly 2 at room temperature after passing through the evaporator assembly 1, the refrigerant refrigeration has a variable frequency compressor adjustment, which will not cause the refrigeration effect to be poor.

[0087] There are three situations when the two-component of the application is running, which are the evaporator assembly 1 and the surface cooler assembly 2 running simultaneously, the evaporator assembly 1 running alone, and the surface cooler assembly 2 running alone. The first situation: when running simultaneously, it is the maximum refrigeration effect state of the two-component. It is usually used in refrigeration environments with high requirements and large cooling capacity. Only the evaporator assembly 1 runs alone, it is usually used in places with variable environmental temperature and high refrigeration requirements that require compressor adjustment of the two-component control environmental temperature. Only the surface cooler assembly 2 runs alone, it is usually used in places with relatively constant environmental temperature and fixed temperature cooling. Since the chilled water refrigeration only needs to control the water valve switch to achieve the refrigeration effect, and the environment in the machine room is stable under normal circumstances, the refrigeration requirement is low, the machine room is usually preferentially set with chilled water refrigeration as the main refrigeration, which can effectively reduce the cost.

[0088] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application. The above only describes the preferred embodiments of the application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, which should be considered as the protection scope of the application.

Claims

1. A heat exchanger assembly, characterized by: The heat exchanger assembly comprises: An evaporator assembly (1) and a surface cooler assembly (2), refrigerant is introduced into the heat exchange pipe of the evaporator assembly (1) so that air can exchange heat with the refrigerant when passing through the evaporator assembly (1), chilled water is introduced into the heat exchange pipe of the surface cooler assembly (2) so that air can exchange heat with the chilled water when passing through the surface cooler assembly (2), the evaporator assembly (1) and the surface cooler assembly (2) are connected as a whole, and the evaporator assembly (1) is located upstream of the surface cooler assembly (2) along the air flow direction; when refrigeration by chilled water is mainly used, the surface cooler assembly (2) works and the evaporator assembly (1) does not work, air is first cooled by the evaporator assembly (1) and then cooled by the surface cooler assembly (2). The surface cooler assembly (2) is at least two, comprising a first surface cooler assembly (21) and a second surface cooler assembly (22), the first surface cooler assembly (21) is opposite to the second surface cooler assembly (22), and a containing space (3) is formed between the first surface cooler assembly (21) and the second surface cooler assembly (22). The distance between the first surface cooler assembly (21) and the second surface cooler assembly (22) in the horizontal direction gradually increases from top to bottom, forming a structure with small horizontal cross-sectional area at the top and large horizontal cross-sectional area at the bottom.

2. The heat exchanger assembly according to claim 1, wherein: when refrigeration by refrigerant is mainly used, the surface cooler assembly (2) does not work and the evaporator assembly (1) works, air is first cooled by the evaporator assembly (1) and then not cooled by the surface cooler assembly (2), and the flow or flow rate of the refrigerant flowing through the evaporator assembly (1) can be adjusted.

3. The heat exchanger assembly according to claim 1, wherein: the evaporator assembly (1) is a plate structure, the surface cooler assembly (2) is also a plate structure, and the gap between the evaporator assembly (1) and the surface cooler assembly (2) has a size greater than 0.

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

5. The heat exchanger assembly according to any one of claims 1-4, wherein: the evaporator assembly (1) is at least two, comprising a first evaporator assembly (11) and a second evaporator assembly (12), the first evaporator assembly (11) and the first surface cooler assembly (21) are assembled as a whole to form a first group of heat exchange assemblies; the second evaporator assembly (12) and the second surface cooler assembly (22) are assembled as a whole to form a second group of heat exchange assemblies. Further comprising an electrical box (4), the first group of heat exchange components and the second group of heat exchange components are spaced apart to form the containing space (3) to contain the electrical box (4) therein, the first evaporator component (11) is away from the containing space (3) relative to the first surface cooler component (21), the second evaporator component (12) is away from the containing space (3) relative to the second surface cooler component (22), the air on one side of the first group of heat exchange components enters the containing space (3) after flowing through the first evaporator component (11) and the first surface cooler component (21), the air on one side of the second group of heat exchange components enters the containing space (3) after flowing through the second evaporator component (12) and the second surface cooler component (22).

6. The heat exchanger component according to claim 1, wherein: the leeward side of the first surface cooler component (21) faces the containing space (3), the leeward side of the second surface cooler component (22) faces the containing space (3), the leeward side of the first surface cooler component (21) forms an inclined angle with the horizontal plane, the leeward side of the second surface cooler component (22) forms an inclined angle with the horizontal plane, and from bottom to top, the leeward side of the first surface cooler component (21) gradually extends towards the direction of the leeward side of the second surface cooler component (22), and the leeward side of the second surface cooler component (22) gradually extends towards the direction of the leeward side of the first surface cooler component (21), so that in the longitudinal section, the leeward side of the first surface cooler component (21) and the leeward side of the second surface cooler component (22) form a triangle or trapezoidal structure with the top smaller than the bottom.

7. The heat exchanger component according to claim 5, wherein: when the evaporator component (1) is a plate structure, and the surface cooler component (2) is also a plate structure, the first evaporator component (11), the second evaporator component (12), the first surface cooler component (21) and the second surface cooler component (22) are all plate structures, the leeward side of the first surface cooler component (21) is parallel to the windward side of the first surface cooler component (21), the leeward side of the second surface cooler component (22) is parallel to the windward side of the second surface 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 to and parallel to the windward side of the first surface cooler component (21), and there is a gap with a size 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 surface cooler component (22), and there is a gap with a size greater than 0 between them.

8. The heat exchanger component according to claim 5, wherein: The air outlet of the accommodating space (3) is located at least at the bottom end of the accommodating space (3), so that the air flow entering the accommodating space (3) is discharged from the bottom end of the accommodating space; The front door plate (5) is further arranged in the accommodating space (3), the electric appliance box (4) is arranged in close contact with the front door plate (5) and is located outside the front door plate (5), that is, the electric appliance box (4) is away from the central position of the accommodating space (3) relative to the front door plate (5).

9. An air conditioner characterized by comprising: The heat exchanger assembly according to any one of claims 1-8.

10. A method of controlling a heat exchanger assembly as claimed in any one of claims 1-8, characterized in that: The heat exchanger assembly comprises: A judging step of judging whether refrigeration by chilled water is mainly required, or refrigeration by refrigerant is mainly required, or refrigeration by chilled water and refrigeration by refrigerant is simultaneously required according to requirements; A control step of controlling the surface cooler assembly (2) to work and the evaporator assembly (1) to not work when refrigeration by chilled water is mainly required, controlling the evaporator assembly (1) to work and the surface cooler assembly (2) to not work when refrigeration by refrigerant is mainly required, and simultaneously controlling the variable frequency compressor connected with the evaporator assembly (1) to adjust, and controlling the evaporator assembly (1) and the surface cooler assembly (2) to work simultaneously when refrigeration by chilled water and refrigeration by refrigerant is simultaneously required.

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