Evaporator assembly, cooling unit and refrigerating system
By using a flexible membrane heater to heat the evaporator in the microchannel heat exchanger of the airplane kitchen cooling unit, the frosting problem is solved, ensuring the normal flow of refrigerant, enhancing the heat exchange effect and preventing pipeline blockage.
Patent Information
- Application Number
- CN202421999110.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-16
AI Technical Summary
The microchannel heat exchanger pipes in the cooling unit of the aircraft kitchen are prone to frost, which causes the refrigerant to fail to flow normally, which may lead to the pipeline blockage in severe cases.
An evaporator assembly is designed, including an evaporator and a flexible film-like heater. The heater heats the evaporator through heat radiation in defrost mode to defrost it and solve the frosting problem.
The heat radiation of the evaporator is heated through the heater to effectively prevent frost and ensure normal flow of refrigerant, which enhances the heat exchange effect of the kitchen cooling unit and avoids the problems of pipeline blockage and system flow blockage.
Smart Images
Figure CN222951265U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refrigeration, and in particular relates to an evaporator component, a cooling unit and a refrigeration system. Background Art
[0002] Aircraft need to release a lot of heat during operation. During normal operation, some auxiliary cooling units are needed to cool the terminal equipment such as the kitchen cooling unit and the heat load unit. The cold circulation system transfers cold through the refrigerant. The inner diameter of the pipe in the flow path of some terminal heat load equipment is small. Frost will form in the pipe section during the cooling process, resulting in the refrigerant being unable to flow normally, which may seriously block the pipe.
[0003] Among them, a microchannel heat exchanger is used as an evaporator inside the kitchen cooling unit. The inner diameter of the pipe section is small, and frost is very likely to occur, so this situation needs to be solved. Utility Model Content
[0004] Therefore, the utility model provides an evaporator assembly, a cooling unit and a refrigeration system, which can solve the technical problem of frosting of the evaporator of the cooling unit in the prior art.
[0005] In order to solve the above problems, the utility model provides an evaporator assembly, which includes an evaporator and a heater;
[0006] There is a gap between the heater and the evaporator, and the heater is used to heat the evaporator by heat radiation in a defrosting mode to defrost the evaporator;
[0007] Wherein, the heater is in the shape of a flexible film.
[0008] In some embodiments, the heater is a PI thin film heater;
[0009] And / or, the heater is provided on at least one side of the evaporator in a thickness direction.
[0010] In some embodiments, the evaporator assembly further comprises a fixing structure, and the fixing structure is used to keep the heater and the evaporator relatively fixed.
[0011] In some embodiments, the fixing structure includes a support member, the evaporator and the heater are both fixed on the support member, and the evaporator and the heater are relatively fixed by the support member.
[0012] In some embodiments, a sheet metal member is disposed on the support member; and the heater is adhered to the sheet metal member to be fixed to the support member through the sheet metal member.
[0013] In some embodiments, the heater has a first side and a second side opposite to each other, the heater is attached to the sheet metal through the first side, and the second side is opposite to the evaporator;
[0014] Wherein, a heat insulating member is provided on a side of the sheet metal member facing away from the heater.
[0015] The utility model also provides a cooling unit, which may include any one of the above-mentioned evaporator components.
[0016] In some embodiments, when the evaporator assembly includes a fixing structure, and the fixing structure includes a support, the cooling unit includes a casing, and the casing serves as the support;
[0017] And / or, the cooling unit is a kitchen cooling unit.
[0018] In some embodiments, the cooling unit includes a first temperature sensor and a second temperature sensor, the first temperature sensor is used to detect the temperature of the liquid outlet pipe of the evaporator, and the second temperature sensor is used to detect the outlet temperature of the cooling unit;
[0019] And / or, the cooling unit further comprises a third temperature sensor, and the third temperature sensor is used to detect the return air temperature of the cooling unit;
[0020] And / or, the cooling unit further comprises a fourth temperature sensor, wherein the fourth temperature sensor is used to detect the surface temperature of the evaporator;
[0021] And / or, the cooling unit further includes a water receiving tray, wherein the water receiving tray is located below the evaporator to receive water dripping from the evaporator.
[0022] The utility model also provides a refrigeration system, which comprises any one of the above-mentioned cooling units;
[0023] The refrigeration system further comprises an auxiliary cooling unit, which is used to provide a refrigerant to the evaporator of the cooling unit so that the refrigerant evaporates in the evaporator to absorb heat.
[0024] The utility model provides an evaporator assembly, a cooling unit and a refrigeration system, which have the following beneficial effects:
[0025] 1. Since the heater can heat the evaporator by heat radiation in the defrost mode, the temperature of the evaporator can be increased to defrost. In addition, since the heater is in the form of a flexible film, the volume of the heater can be saved, which is conducive to the installation of the heater in a narrow space, making the installation of the heater more flexible.
[0026] 2. It solves the problem of unsatisfactory heat exchange effect of the kitchen cooling unit, enhances the heat exchange effect of the kitchen cooling unit, solves the problem of kitchen cooling unit heat exchanger pipeline blockage or system flow blockage, and can prevent the pipeline from bursting due to high pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0028] Figure 1 This is a structural schematic diagram of an evaporator assembly provided by an embodiment of the utility model;
[0029] Figure 2 is a structural schematic diagram of an evaporator assembly provided by another embodiment of the utility model;
[0030] Figure 3 It is a schematic diagram reflecting the auxiliary cooling unit delivering refrigerant to the evaporator.
[0031] The accompanying drawings are marked as follows:
[0032] 1. Evaporator; 2. Heater; 3. Sheet metal; 4. Heat insulation; 5. Support; 6. Auxiliary cooling unit; 21. First side; 22. Second side. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0034] In the description of the present utility model, it needs to be understood 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, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0035] 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.
[0036] 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 utility model.
[0037] See also Figure 1 As shown, according to an embodiment of the present utility model, an evaporator assembly is provided, which includes an evaporator 1 and a heater 2. In some embodiments, the evaporator 1 can be a microchannel heat exchanger or the like.
[0038] There is a gap between the heater 2 and the evaporator 1, and the heater 2 is used to heat the evaporator 1 by heat radiation in the defrosting mode to defrost the evaporator 1. The heater 2 is in the shape of a flexible film.
[0039] In the above example, since the heater 2 can heat the evaporator 1 by heat radiation in the defrosting mode, the temperature of the evaporator 1 can be increased to defrost. In addition, since the heater 2 is in the form of a flexible film, the volume of the heater 2 can be saved, which is conducive to the installation of the heater 2 in a narrow space, making the installation of the heater 2 more flexible.
[0040] In some embodiments, the aforementioned heater 2 may be a PI film heater. The PI film heater 2 is a commercially available part, and its specific structure is a prior art. Among them, the PI film heater 2 is a translucent or fully transparent metal flexible electric heating film, the PI film heater 2 is a layered structure, and both sides are films with good temperature resistance and excellent insulation, and the middle is a resistive circuit made of special alloy foil. The PI film heater 2 occupies a small space, is light in weight, and is thin in thickness. It is suitable for the spatial position of the cooling unit, especially the kitchen cooling unit, and it can provide a uniform thermal field and can be defrosted quickly in a short time.
[0041] In some embodiments, the heater 2 is disposed on at least one side in the thickness direction of the evaporator 1. Preferably, the heater 2 is disposed on both sides in the thickness direction of the evaporator 1 to improve the defrosting effect.
[0042] In some embodiments, the aforementioned evaporator assembly further includes a fixing structure, which is used to keep the heater 2 and the evaporator 1 relatively fixed, so as to improve the stability of the heat radiation heating of the evaporator 1 by the heater 2. In a specific application example, Figure 2 As shown, the above-mentioned fixing structure may include a support member 5 , and the above-mentioned evaporator 1 and heater 2 are both fixed on the support member 5 , and the evaporator 1 and the heater 2 are kept relatively fixed by the support member 5 .
[0043] It should be noted here that the above-mentioned support member 5 is generally a fixed member, and both the evaporator 1 and the heater 2 are installed on the same fixed support member 5, so that the two can be kept relatively fixed and there is a stable interval between them, so that the heater 2 can stably heat the evaporator 1 with thermal radiation.
[0044] In some embodiments, Figure 2 As shown, the aforementioned support member 5 may be provided with a sheet metal member 3, and the aforementioned heater 2 may be pasted on the sheet metal member 3 to be fixed to the support member 5 through the sheet metal member 3. Since the heater 2 is in the form of a flexible film, it is convenient to paste it, and it can save installation space, which is conducive to installation in a narrow space.
[0045] In some embodiments, Figure 2 As shown, the aforementioned heater 2 has a first side 21 and a second side 22 opposite to each other. The heater 2 is attached to the sheet metal part 3 via the first side 21, and the second side 22 of the heater 2 is opposite to the evaporator 1. A heat insulating member 4 is provided on the side of the sheet metal part 3 facing away from the heater 2, and the heat insulating member 4 can be heat insulating cotton such as sponge.
[0046] In the above example, the heat insulating member 4 can prevent the heater 2 from leaking heat, so as to reduce the heat loss on the heater 2 .
[0047] In some embodiments, when the thermal insulation element 4 is thermal insulation cotton, the highest temperature point of the thermal insulation cotton is about 150°C.
[0048] The utility model also provides a cooling unit, which may include any of the above evaporator components. In the cooling unit, because the above evaporator components are used, the heater 2 can heat the evaporator 1 by heat radiation in the defrosting mode, so that the temperature of the evaporator 1 can be increased to defrost. In addition, because the heater 2 is in the shape of a flexible film, the volume of the heater 2 can be saved, which is conducive to the installation of the heater 2 in a narrow space, making the installation of the heater 2 more flexible.
[0049] In some embodiments, the aforementioned cooling unit is a kitchen cooling unit.
[0050] In some embodiments, when the evaporator assembly includes a fixing structure, and the fixing structure includes a support member 5 , the cooling unit of the present invention further includes a casing, and the casing serves as the aforementioned support member 5 .
[0051] In some embodiments, the aforementioned cooling unit may further include a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is used to detect the temperature of the liquid outlet pipe of the evaporator 1, and the second temperature sensor is used to detect the air outlet temperature of the cooling unit.
[0052] In the above example, both the first temperature sensor and the second temperature sensor can be used in conjunction with the controller, and the controller can determine whether to enter the defrost mode according to the temperature of the liquid outlet pipe, the outlet air temperature, and the duration, etc. When the evaporator assembly is operating in the defrost mode, the controller can also determine whether to exit the defrost mode according to the temperature of the liquid outlet pipe, the outlet air temperature, and the duration, etc.
[0053] In some embodiments, the aforementioned cooling unit may further include a third temperature sensor, and the third temperature sensor is used to detect the return air temperature of the cooling unit.
[0054] In the above example, the third temperature sensor can be used in conjunction with the controller. When the evaporator assembly operates in the defrost mode, the controller can determine whether to exit the defrost mode based on the return air temperature and duration.
[0055] In some embodiments, the aforementioned cooling unit further includes a fourth temperature sensor, and the fourth temperature sensor is used to detect the surface temperature of the evaporator 1 .
[0056] In the above example, the above-mentioned fourth temperature sensor can be used in conjunction with the controller. When the evaporator assembly is operating in the defrost mode, the controller can determine whether to exit the defrost mode based on the surface temperature and duration of the evaporator 1 to prevent the surface temperature of the evaporator 1 from being too high and causing damage to the insulation component 4.
[0057] It should be noted here that the above-mentioned controller can be a processor or a PLC programmable logic controller, etc. Its specific structure is existing technology and will not be repeated here.
[0058] In some embodiments, the cooling unit further comprises a water receiving tray, which is located below the evaporator 1 to receive water dripping from the evaporator 1 .
[0059] Among them, by adding heater 2 to heat up and defrost the evaporator 1, since the pipe section of the evaporator 1 is an uneven flow path, the distance between each position and the heater 2 is different, and the defrosting effect is also different, which may lead to incomplete defrosting. It can be judged whether there is still frost melting by observing whether there is a frost layer remaining on the surface of the evaporator 1 or whether there is water dripping continuously to the water receiving tray at the bottom of the evaporator 1. If water is still dripping continuously to the water receiving tray after the automatic defrost mode ends, it can be judged that the frost has not been completely melted, and the defrost mode can be manually controlled at this time.
[0060] like Figure 3 As shown, the utility model also provides a refrigeration system, which may include any of the above cooling units. The refrigeration system further includes an auxiliary cooling unit 6, which is used to provide a coolant to the evaporator 1 of the cooling unit, so that the coolant evaporates and absorbs heat in the evaporator 1. The specific structure of the auxiliary cooling unit 6 is prior art and will not be described in detail here.
[0061] In the above example, since the refrigeration system adopts the above cooling unit, the cooling unit includes the above evaporator assembly, and since the heater 2 can heat the evaporator 1 by heat radiation in the defrosting mode, the temperature of the evaporator 1 can be increased to defrost. In addition, since the heater 2 is in the form of a flexible film, the volume of the heater 2 can be saved, which is conducive to the installation of the heater 2 in a narrow space, making the installation of the heater 2 more flexible.
[0062] Among them, in the refrigeration condition, when the auxiliary cooling unit 6 outputs cold to the cooling unit, such as the kitchen cooling unit, the cooling unit is prone to frost or ice, resulting in insufficient flow or pipeline blockage. The utility model can defrost the evaporator 1 by adding a heater 2, such as a PI film heater, to heat the evaporator 1, thereby solving the problem of unsatisfactory heat exchange effect of the kitchen cooling unit, enhancing the heat exchange effect of the kitchen cooling unit, solving the problem of pipeline blockage of the kitchen cooling unit heat exchanger or system flow blockage, and preventing the pipeline from bursting due to high pressure.
[0063] For ease of understanding, the working principle of the utility model is explained below: the auxiliary cooling unit 6 mainly provides cooling demand for terminal heat load equipment such as kitchens and large electronic equipment. These terminal heat load equipment are cooled by the evaporator 1, and the refrigerant loop circulates the refrigerant to the cooling unit, such as the kitchen cooling unit, for heat exchange. The cooling unit includes an evaporator 1, which can be a microchannel heat exchanger, and the refrigerant is a propylene glycol solution with high density. If there are some impurities in the evaporator 1, it will cause pipeline blockage. When the refrigerant enters the evaporator 1, it flows from the large-diameter flow path to the small-diameter flow path. The refrigerant has sufficient cooling capacity, and it is easy to frost in the pipe section of the evaporator 1. Ice slag is easy to form on the inner wall of the pipe, resulting in a certain degree of blockage, which in turn affects the heat exchange effect and the flow path circulation. Therefore, a heater 2 is used to heat the outer wall of the tube of the evaporator 1 to defrost the outer wall of the evaporator 1. The above-mentioned heater 2 can be set on both sides of the thickness direction of the evaporator 1. Among them, the heater 2 can be a PI film heater.
[0064] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.
[0065] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. 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 utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.
Claims
1. An evaporator assembly, characterized in that: It comprises an evaporator (1) and a heater (2); There is a gap between the heater (2) and the evaporator (1), and the heater (2) is used to heat the evaporator (1) by means of heat radiation in a defrosting mode so as to defrost the evaporator (1); Wherein, the heater (2) is in the form of a flexible film.
2. The evaporator assembly according to claim 1, characterized in that: The heater (2) is a PI thin film heater; And / or, the heater (2) is provided on at least one side in the thickness direction of the evaporator (1).
3. The evaporator assembly according to claim 1 or 2, characterized in that: It also comprises a fixing structure, wherein the fixing structure is used to keep the heater (2) and the evaporator (1) relatively fixed.
4. The evaporator assembly according to claim 3, characterized in that: The fixing structure comprises a support member (5), the evaporator (1) and the heater (2) are both fixed on the support member (5), and the evaporator (1) and the heater (2) are kept relatively fixed by the support member (5).
5. The evaporator assembly according to claim 4, characterized in that: A sheet metal part (3) is provided on the support member (5); the heater (2) is adhered to the sheet metal part (3) so as to be fixed to the support member (5) through the sheet metal part (3).
6. The evaporator assembly according to claim 5, characterized in that: The heater (2) has a first side (21) and a second side (22) opposite to each other, the heater (2) is adhered to the sheet metal (3) via the first side (21), and the second side (22) is opposite to the evaporator (1); Wherein, a heat insulating component (4) is provided on the side of the sheet metal component (3) facing away from the heater (2).
7. A cooling unit, characterized in that: The evaporator assembly comprises the evaporator assembly according to any one of claims 1 to 6.
8. The cooling unit according to claim 7, characterized in that: When the evaporator assembly comprises a fixing structure, and the fixing structure comprises a support member (5), the cooling unit comprises a casing, and the casing serves as the support member (5); And / or, the cooling unit is a kitchen cooling unit.
9. The cooling unit according to claim 7 or 8, characterized in that: The cooling unit comprises a first temperature sensor and a second temperature sensor, the first temperature sensor being used to detect the temperature of the liquid outlet pipe of the evaporator (1), and the second temperature sensor being used to detect the outlet temperature of the cooling unit; And / or, the cooling unit further comprises a third temperature sensor, and the third temperature sensor is used to detect the return air temperature of the cooling unit; And / or, the cooling unit further comprises a fourth temperature sensor, the fourth temperature sensor being used to detect the surface temperature of the evaporator (1); And / or, the cooling unit further comprises a water receiving tray, wherein the water receiving tray is located below the evaporator (1) to receive water dripping from the evaporator (1).
10. A refrigeration system, characterized in that: A cooling unit comprising any one of claims 7 to 9; The refrigeration system further comprises an auxiliary cooling unit (6), wherein the auxiliary cooling unit (6) is used to provide a refrigerant to the evaporator (1) of the cooling unit, so that the refrigerant evaporates in the evaporator (1) to absorb heat.