Defrosting coil pipe system and air conditioner

Abstract

The utility model belongs to the technical field of coil defrosting, and discloses a defrosting coil system and an air conditioner. The defrosting coil pipe system comprises a heat preservation box, a first coil pipe assembly and a second coil pipe assembly. A first refrigeration channel and a second refrigeration channel are arranged in the heat preservation box. The first coil pipe assembly is located in the first refrigerating channel and comprises a first control valve, a first coil pipe and a first heating device, and the first heating device is used for heating the first coil pipe. The second coil pipe assembly is located in the second refrigerating channel and comprises a second control valve, a second coil pipe and a second heating device, and the second heating device is used for heating the second coil pipe. According to the defrosting coil pipe system, the two coil pipe assemblies are arranged, when one coil pipe assembly needs to be defrosted, the refrigeration channel where the coil pipe assembly is located is closed, the coil pipe assembly needing to be defrosted is isolated from the air supply path to be heated and defrosted, and the other coil pipe assembly is located in the air supply path to conduct refrigeration work; and therefore, the refrigeration work can be continuously carried out during defrosting.

Description

Technical Field

[0001] The utility model relates to the technical field of coil defrosting, in particular to a defrosting coil system and an air conditioner. Background Art

[0002] Air conditioning coils, primarily composed of copper tubes and fins, are key components for cooling the air. Chilled water enters the copper tubes, exchanges heat with the air, and then exits the coils. The chilled water inlet temperature is typically 7°C, while the air outlet temperature is typically greater than 13°C. Under these operating conditions, during cooling, water vapor in the air condenses into droplets, which adhere to the fins and are then discharged along the coils.

[0003] However, in some special situations, the coil is required to deliver air at a low temperature (below 5°C). Under such operating conditions, the chilled water inlet temperature will be below 0°C. After long-term operation, frost will form on the fin surface, resulting in a reduction in the heat exchange area of ​​the fin and a decrease in heat exchange capacity, which in turn causes unstable indoor temperature. At the same time, as frost continues to accumulate, the wind resistance on the coil surface increases, resulting in increased air conditioning energy consumption. In this case, the unit needs to be stopped and the coil needs to be defrosted, which affects normal cooling operation.

[0004] Therefore, there is an urgent need for a defrost coil system and an air conditioner to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a defrosting coil system, which can defrost the coil without stopping the machine, thereby ensuring the normal operation of the refrigeration work.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A defrost coil system is provided, comprising:

[0008] An insulated box, wherein the insulated box is provided with an air inlet and an air outlet, and a first refrigeration channel and a second refrigeration channel are provided in the insulated box;

[0009] a first coil assembly, the first coil assembly being located in the first refrigeration channel, the first coil assembly comprising a first control valve, a first coil, and a first heating device, the first control valve being disposed at a front end of the first coil in an air supply direction, and the first heating device being configured to heat the first coil;

[0010] The second coil assembly is located in the second refrigeration channel. The second coil assembly includes a second control valve, a second coil and a second heating device. The second control valve is arranged at the front end of the second coil in the air supply direction. The second heating device is used to heat the second coil.

[0011] As an optional solution of the defrost coil system, the first coil assembly further includes a first pressure difference detection element, and the first pressure difference detection element is used to detect the air pressure at the front end and the rear end of the first coil.

[0012] As an optional solution of the defrost coil system, the second coil assembly further includes a second pressure difference detection element, and the second pressure difference detection element is used to detect the air pressure at the front end and the rear end of the second coil.

[0013] As an optional solution of the defrost coil system, the first coil assembly further includes a first temperature measuring element, which is connected to the first heating device and is used to detect the temperature of the first heating device.

[0014] As an optional solution of the defrost coil system, the second coil assembly further includes a second temperature measuring element, which is connected to the second heating device and is used to detect the temperature of the second heating device.

[0015] As an optional solution of the defrost coil system, the first coil assembly further includes a first catalytic device connected to the first heating device.

[0016] As an optional solution of the defrost coil system, the second coil assembly further includes a second catalytic device connected to the second heating device.

[0017] As an optional solution for the defrost coil system, the first coil assembly further includes a third control valve, and the third control valve is arranged at the rear end of the first coil in the air supply direction.

[0018] As an optional solution for the defrost coil system, the second coil assembly further includes a fourth control valve, which is arranged at the rear end of the second coil in the air supply direction.

[0019] Another object of the present invention is to provide an air conditioner that can ensure normal operation of the air conditioner refrigeration work when the coil is defrosted, thereby preventing the air conditioner from shutting down and affecting the refrigeration effect.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] An air conditioner is provided, comprising a fan and the above-mentioned defrost coil system, wherein the fan is arranged in the heat preservation box and blows air from the air inlet to the air outlet.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a defrosting coil system, comprising an insulation box, a first coil assembly, and a second coil assembly. The insulation box is provided with a first refrigeration channel and a second refrigeration channel, and the first coil assembly and the second coil assembly are respectively arranged in the first refrigeration channel and the second refrigeration channel. When the first coil needs to be defrosted, the first control valve is closed and the second control valve is opened, so that the first refrigeration channel is closed and the second refrigeration channel is opened, so that the air inlet and the air outlet in the insulation box are connected only through the second refrigeration channel, and the refrigeration operation is achieved through the second coil assembly. At the same time, the first heating device is turned on to heat the first coil, thereby achieving defrosting of the first coil. When the second coil needs to be defrosted, the second control valve is closed, the first control valve and the second heating device are opened, thereby closing the second refrigeration channel, the second heating device defrosts the second coil, and the first coil assembly performs the refrigeration operation. The defrost coil system proposed by the utility model is provided with two coil assemblies. When one of the coil assemblies needs to be defrosted, the refrigeration channel in which it is located is closed, so that the coil assembly that needs to be defrosted is isolated from the air supply path for heating and defrosting, and the other coil assembly is located in the air supply path for cooling, thereby ensuring uninterrupted refrigeration work and ensuring the cooling effect.

[0024] The utility model also provides an air conditioner, comprising a fan and the above-mentioned defrost coil system, wherein the fan is capable of supplying air from an air inlet to an air outlet. When a first control valve is closed and the first coil is defrosting, the second coil assembly participates in cooling operation, and the fan supplies air through a second cooling channel. When a second control valve is closed and the second coil is defrosting, the first coil assembly participates in cooling operation, and the fan supplies air through the first cooling channel, thereby delivering cold air in the insulated box and ensuring normal refrigeration operation of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the defrost coil system provided by the utility model.

[0026] In the picture:

[0027] 1. Insulation box; 11. Air inlet; 12. Air outlet; 13. First cooling channel; 14. Second cooling channel;

[0028] 2. First coil assembly; 21. First control valve; 22. First coil; 23. First heating device; 24. First catalytic device; 25. Third control valve;

[0029] 3. Second coil assembly; 31. Second control valve; 32. Second coil; 33. Second heating device; 34. Second catalytic device; 35. Fourth control valve;

[0030] 4. Fan. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] like Figure 1As shown, the defrost coil system of this embodiment includes an insulation box 1, a first coil assembly 2, and a second coil assembly 3. The insulation box 1 is provided with an air inlet 11 and an air outlet 12, and is provided with a first refrigeration channel 13 and a second refrigeration channel 14. The first coil assembly 2 is located in the first refrigeration channel 13 and includes a first control valve 21, a first coil 22, and a first heating device 23. The first control valve 21 is located at the front end of the first coil 22 in the air supply direction, and the first heating device 23 is used to heat the first coil 22. The second coil assembly 3 is located in the second refrigeration channel 14 and includes a second control valve 31, a second coil 32, and a second heating device 33. The second control valve 31 is located at the front end of the second coil 32 in the air supply direction, and the second heating device 33 is used to heat the second coil 32.

[0036] Based on the above design, the defrost coil system provided in this embodiment is such that when the first coil 22 needs to be defrosted, the first control valve 21 is closed and the second control valve 31 is opened, so that the first refrigeration channel 13 is closed and the second refrigeration channel 14 is opened. The air inlet 11 and the air outlet 12 in the insulated box 1 are connected only through the second refrigeration channel 14. At this time, the second coil assembly 3 is used to achieve cooling, and the first heating device 23 is simultaneously turned on to heat the first coil 22, thereby achieving defrosting of the first coil 22. When the second coil 32 needs to be defrosted, the second control valve 31 is closed, the first control valve 21 and the second heating device 33 are opened, thereby closing the second refrigeration channel 14, and the second heating device 33 is used to heat and defrost the second coil 32, and the first coil assembly 2 performs cooling.

[0037] The defrosting coil system proposed by the utility model is provided with two coil assemblies. When one of the coil assemblies needs to be defrosted, the refrigeration channel in which it is located is closed by a control valve, so that the coil assembly that needs to be defrosted is isolated from the air supply path for heating and defrosting, and the other coil assembly is located in the air supply path for cooling work, thereby ensuring that during the defrosting process of one coil, the cooling work of the other coil is carried out uninterruptedly.

[0038] It can be understood that in this embodiment, the defrost coil system also includes a controller, which is signal-connected to the first coil assembly 2 and the second coil assembly 3. The controller can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer or a distributed multi-chip microcomputer. The control program can be run in the controller to control the first control valve 21, the second control valve 31, the first heating device 23 and the second heating device 33 to realize their functions.

[0039] Furthermore, the first coil assembly 2 also includes a first differential pressure detection element, which is used to detect the air pressure at the front and rear ends of the first coil 22. When frost forms on the surface of the first coil 22, the wind resistance of air flowing through the first coil 22 increases, resulting in different air pressures at the front and rear ends of the first coil 22 in the air supply direction. The first differential pressure detection element can monitor the air pressure at the front and rear ends of the first coil 22. By comparing the air pressure difference, the thickness of the frost on the first coil 22 can be determined, thereby more intuitively determining whether the first coil 22 needs to be defrosted, improving the convenience of the defrosting operation and ensuring refrigeration efficiency.

[0040] It can be understood that the second coil assembly 3 also includes a second pressure differential detection element, which is used to detect the air pressure at the front and rear ends of the second coil 32. The working principle and function of the second pressure differential monitoring element are the same as those of the first pressure differential monitoring element, and will not be repeated here.

[0041] Preferably, the first pressure difference detection element and the second pressure difference detection element can be connected to the controller signal, so as to realize real-time data monitoring of air pressure and improve the convenience of defrost monitoring.

[0042] Furthermore, the first coil assembly 2 also includes a first temperature measuring element, which is connected to the first heating device 23 and is used to detect the temperature of the first heating device 23. When defrosting the first coil 22, the first heating device 23 is turned on to heat the first coil 22, and the temperature of the first heating device 23 is detected by the first temperature measuring element to prevent damage caused by excessive temperature. Optionally, when the temperature of the first heating device 23 reaches the melting point, the first heating device 23 is turned off, and the residual heat of the first heating device 23 is used to continuously defrost the first coil 22. This can achieve a good defrosting effect, save energy, and reduce usage costs.

[0043] Similarly, the second coil assembly 3 may further include a second temperature measuring element connected to the second heating device 33 for detecting the temperature of the second heating device 33. The working principle and function of the second temperature measuring element are the same as those of the first temperature measuring element and are not described in detail here.

[0044] In some embodiments, the first heating device 23 and the second heating device 33 may be PTC heaters, which have excellent thermal conductivity and heat dissipation performance, high efficiency, safety and reliability. In some other embodiments, the first heating device 23 and the second heating device 33 may also be electromagnetic heaters, glass tube heaters, etc.

[0045] Preferably, in this embodiment, the first heating device 23 is installed on the side of the first coil 22 away from the first control valve 21, and the second heating device 33 is installed on the side of the second coil 32 away from the second control valve 31, increasing the distance between the first heating device 23 and the first refrigeration channel 13 and the distance between the second heating device 33 and the second refrigeration channel 14, thereby reducing the influence of the first heating device 23 on the refrigeration air temperature at the inlet of the second refrigeration channel 14 when the first coil 22 is heated and defrosted, and reducing the influence of the second heating device 33 on the refrigeration air temperature at the inlet of the first refrigeration channel 13 when the second coil 32 is heated and defrosted, thereby reducing energy consumption and ensuring the refrigeration effect.

[0046] Furthermore, the first coil assembly 2 also includes a first catalytic device 24, which is connected to the first heating device 23. The first catalytic device 24 can accelerate the heat transfer speed from the first heating device 23 to the first coil 22, reduce heat loss, and improve defrosting efficiency.

[0047] It is understandable that the second coil assembly 3 further includes a second catalytic device 34, which is connected to the second heating device 33. The second catalytic device 34 has the same function as the first catalytic device 24, and will not be described in detail here.

[0048] Furthermore, the first coil assembly 2 also includes a third control valve 25, which is arranged at the rear end of the first coil 22 in the air supply direction. When the first coil 22 needs to be defrosted, the third control valve 25 and the first control valve 21 are closed simultaneously, that is, a closed space is formed in the first refrigeration channel 13, and the first coil 22 is heated and defrosted in the first refrigeration channel 13. This arrangement can control the heat of the first heating device 23 to remain in the first refrigeration channel 13 and not overflow, which can not only ensure the efficiency of defrosting, but also reduce the impact on the cooling effect. When the first coil 22 does not need to be defrosted, the first control valve 21 and the third control valve 25 are opened simultaneously to ensure smooth circulation in the first refrigeration channel 13.

[0049] Similarly, the second coil assembly 3 also includes a fourth control valve 35, which is arranged at the rear end of the second coil 32 in the air supply direction. The fourth control valve 35 and the second control valve 31 are opened or closed at the same time, which can realize the closure and circulation of the second refrigeration channel 14.

[0050] This embodiment also provides an air conditioner, comprising a fan 4 and the aforementioned defrost coil system. Fan 4 is disposed within an insulated box 1 and blows air from an air inlet 11 to an air outlet 12. When the first control valve 21 is closed and the first coil 22 is defrosting, the second coil assembly 3 participates in cooling operations, and the fan 4 delivers air through the second refrigeration passage 14. When the second control valve 31 is closed and the second coil 32 is defrosting, the first coil assembly 2 participates in cooling operations, and the fan 4 delivers air through the first refrigeration passage 13, thereby delivering cold air within the insulated box 1 and ensuring the normal operation of the air conditioner's refrigeration operation.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A defrost coil system, characterized in that: include: An insulation box (1), wherein the insulation box (1) is provided with an air inlet (11) and an air outlet (12), and a first refrigeration channel (13) and a second refrigeration channel (14) are provided in the insulation box (1); A first coil assembly (2), the first coil assembly (2) being located in the first refrigeration channel (13), the first coil assembly (2) comprising a first control valve (21), a first coil (22) and a first heating device (23), the first control valve (21) being arranged at the front end of the first coil (22) in the air supply direction, and the first heating device (23) being used for heating the first coil (22); A second coil assembly (3), the second coil assembly (3) is located in the second refrigeration channel (14), the second coil assembly (3) comprises a second control valve (31), a second coil (32) and a second heating device (33), the second control valve (31) is arranged at the front end of the second coil (32) in the air supply direction, and the second heating device (33) is used to heat the second coil (32).

2. The defrost coil system according to claim 1, wherein: The first coil assembly (2) further comprises a first pressure difference detection element, which is used to detect the air pressure at the front end and the rear end of the first coil (22).

3. The defrost coil system according to claim 1, wherein: The second coil assembly (3) further comprises a second pressure difference detection element, which is used to detect the air pressure at the front end and the rear end of the second coil (32).

4. The defrost coil system according to claim 1, wherein: The first coil assembly (2) further comprises a first temperature measuring element, which is connected to the first heating device (23) and is used to detect the temperature of the first heating device (23).

5. The defrost coil system according to claim 1, wherein: The second coil assembly (3) further comprises a second temperature measuring element, which is connected to the second heating device (33) and is used to detect the temperature of the second heating device (33).

6. The defrost coil system according to claim 1, wherein: The first coil assembly (2) further comprises a first catalytic device (24), wherein the first catalytic device (24) is connected to the first heating device (23).

7. The defrost coil system according to claim 1, wherein: The second coil assembly (3) further comprises a second catalytic device (34), and the second catalytic device (34) is connected to the second heating device (33).

8. The defrost coil system according to claim 1, wherein: The first coil assembly (2) further includes a third control valve (25), and the third control valve (25) is arranged at the rear end of the first coil (22) in the air supply direction.

9. The defrost coil system according to claim 1, wherein: The second coil assembly (3) further includes a fourth control valve (35), and the fourth control valve (35) is arranged at the rear end of the second coil (32) in the air supply direction.

10. An air conditioner, characterized in that: The invention comprises a fan (4) and a defrost coil system according to any one of claims 1 to 9, wherein the fan (4) is arranged in the thermal insulation box (1), and the fan (4) blows air from the air inlet (11) to the air outlet (12).

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