A refrigerator

Abstract

The application is suitable for the field of ice making technology, and provides a refrigerator, which comprises a cabinet, an ice making assembly and a refrigeration evaporator. The cabinet has a refrigeration chamber and a mounting space, and the refrigeration chamber is used for storing food or other articles that need to be refrigerated. The ice making assembly is mounted on the cabinet, and the ice making assembly comprises an ice maker, a water kettle and a coil pipe. The water kettle is communicated with the ice maker through the coil pipe, the coil pipe is located in the mounting space, and ice making solution in the water kettle can be guided into the ice maker through the coil pipe. The refrigeration evaporator is arranged in the mounting space, and the refrigeration evaporator is used for providing cold quantity for the refrigeration chamber and the coil pipe. The coil pipe is arranged between the ice maker and the water kettle, and the coil pipe is arranged on one side of the refrigeration evaporator. The refrigeration evaporator of the refrigerator used for providing cold quantity for the refrigeration chamber is used for precooling the ice making solution in the coil pipe, the temperature of the ice making solution is lowered in advance, and therefore the ice making time of the ice maker is shortened and the ice making efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of ice-making technology, and more specifically, to a refrigerator. Background Technology

[0002] With the continuous development of technology, modern refrigerators not only have food refrigeration and freezing functions, but also ice-making functions. Currently, most refrigerators on the market with ice-making functions usually use room temperature water to make ice, which takes a long time and is inefficient. Utility Model Content

[0003] The purpose of this application is to provide a refrigerator that solves the technical problem of low ice-making efficiency in existing refrigerators with ice-making functions.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a refrigerator, comprising:

[0005] The container has a refrigeration compartment and installation space;

[0006] An ice-making assembly is installed in the housing. The ice-making assembly includes an ice maker, a kettle, and a coil. The kettle is connected to the ice maker through the coil. The coil is located within the installation space. The ice-making solution in the kettle can be introduced into the ice maker through the coil.

[0007] A refrigerated evaporator is disposed within the installation space, the refrigerated evaporator being used to provide cooling to the refrigerated compartment and the coils.

[0008] According to the above technical solution, by installing a coil between the ice maker and the kettle, and placing the coil on one side of the refrigeration evaporator, the refrigeration evaporator, which provides cooling to the refrigerator compartment, pre-cools the ice-making solution in the coil, thereby reducing the temperature of the ice-making solution in advance, thus shortening the ice-making time of the ice maker and improving ice-making efficiency.

[0009] In one possible design, the refrigerator further includes a fan mounted on the cabinet, the fan being used to blow air from the refrigerator compartment toward the mounting space.

[0010] According to the above technical solution, in addition to precooling the ice-making solution in the coil, the possibility of the ice-making solution freezing in the coil can also be effectively reduced.

[0011] In one possible design, the coil is located on the upper side of the refrigerated evaporator.

[0012] According to the above technical solution, water droplets formed after the refrigerated evaporator defrosts can be prevented from dripping onto the coils.

[0013] In one possible design, the fan is located above the coil.

[0014] According to the above technical solution, the airflow can pass through the coil first and then through the refrigeration evaporator, avoiding the ice-making solution in the coil from freezing due to the excessive temperature drop caused by the airflow passing through the refrigeration evaporator first.

[0015] In one possible design, the refrigerator further includes a controller and a first temperature sensor, the first temperature sensor being installed on the refrigeration evaporator; the controller is connected to the first temperature sensor and the fan respectively, the first temperature sensor is used to detect the temperature of the refrigeration evaporator and feed the detection result back to the controller, the controller is used to control the working state of the fan according to the detection result, so that the temperature of the refrigeration evaporator is above 0°C.

[0016] According to the above technical solution, by keeping the temperature of the refrigerated evaporator above 0°C, the temperature of the ice-making solution in the coil can also be kept above 0°C, effectively reducing the possibility of the ice-making solution freezing in the coil.

[0017] In one possible design, the refrigerator further includes a second temperature sensor disposed in the refrigerator compartment. The controller is also signal-connected to the refrigerator evaporator and the second temperature sensor respectively. The second temperature sensor is used to feed back a signal to the controller after detecting that the temperature in the refrigerator compartment is less than or equal to a first preset value. The controller is used to control the refrigerator evaporator to stop working and control the fan to start working according to the signal fed back by the second temperature sensor.

[0018] According to the above technical solution, when the second temperature sensor detects that the temperature in the refrigerator compartment is less than or equal to the first preset value, the controller controls the refrigerator evaporator to stop working and controls the fan to start working to blow air into the area where the refrigerator evaporator and coil are located. This ensures that the temperature in the refrigerator compartment meets the requirements and also effectively reduces the possibility of the ice-making solution freezing in the coil.

[0019] In one possible design, the coil extends in a serpentine pattern.

[0020] According to the above technical solution, increasing the length of the coil allows the ice-making solution to exchange heat more fully with the cold energy generated by the refrigeration evaporator when flowing through the coil, improving the pre-cooling effect and thus improving ice-making efficiency.

[0021] In one possible design, the refrigerator further includes a water inlet pipe and a filter, the filter being disposed on the water inlet pipe, the water inlet pipe being connected to the kettle, and the water inlet pipe being used to supply ice-making solution to the kettle.

[0022] According to the above technical solution, the ice-making solution entering the kettle is filtered through a filter, thereby improving the quality of ice making.

[0023] In one possible design, the filter is located in the refrigerator compartment.

[0024] According to the above technical solution, the temperature of the environment in which the filter is located is relatively low, so that when the ice-making solution passes through the filter, it can be initially cooled, allowing the ice-making solution to cool down faster and further improving the ice-making efficiency.

[0025] In one possible design, the refrigerator further includes a pump valve assembly, through which the kettle is connected to the coil, the pump valve assembly being used to deliver the ice-making solution in the kettle along the coil to the ice maker.

[0026] According to the above technical solution, the pump and valve assembly provides power for the ice-making solution to flow to the ice maker, so that the ice-making solution can flow smoothly to the ice maker for ice making. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in one embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the refrigerator structure from another perspective, provided in one embodiment of this application;

[0030] Figure 3 This is an exploded schematic diagram of refrigerator parts provided in one embodiment of this application;

[0031] Figure 4 This is a schematic diagram of a refrigerator module provided in one embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of the inner box and the tube clamp in a refrigerator according to an embodiment of this application;

[0033] Figure 6 This is a cross-sectional schematic diagram of the inner box and partition assembly in a refrigerator provided in one embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the refrigerator's hidden inner and outer boxes from one perspective, provided in an embodiment of this application.

[0035] Figure 8 This is a schematic diagram of the refrigerator's hidden inner and outer boxes from another perspective, provided in one embodiment of this application.

[0036] Figure 9 This is an exploded schematic diagram of a refrigerator partition assembly and a fan provided in one embodiment of this application;

[0037] Figure 10 yes Figure 5 A magnified view of a portion of point A in the middle;

[0038] Figure 11 yes Figure 7 A magnified view of a portion of point B in the middle.

[0039] The details of the reference numerals used in the above figures are as follows:

[0040] 100. Cabinet; 101. Refrigerated compartment; 102. Installation space; 110. Outer casing; 120. Inner casing; 121. Receiving slot; 130. Divider assembly; 131. First partition; 1311. Air inlet; 132. Second partition; 1321. Through hole; 133. Return air vent;

[0041] 200. Ice-making assembly; 210. Ice maker; 220. Kettle; 230. Coil;

[0042] 300. Refrigerated evaporator;

[0043] 400. Fan;

[0044] 500. First temperature sensor;

[0045] 600, Filter;

[0046] 700. Pump and valve assembly; 711. First liquid inlet; 712. First liquid outlet; 721. Second liquid inlet; 722. Second liquid outlet;

[0047] 800. Pipe clamp;

[0048] 910, First pipe; 920, Second pipe; 930, Inlet pipe; 931, Third pipe; 932, Fourth pipe; 940, Fifth pipe. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0050] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0053] With the continuous development of technology, modern refrigerators not only have food refrigeration and freezing functions, but also ice-making functions. Currently, the common ice-making systems in refrigerators on the market mainly consist of an ice maker and a water supply unit. The water supply unit is used to input liquid water into the ice maker, which then produces ice. However, most refrigerators currently use room temperature water directly into the ice maker during the ice-making process, resulting in longer ice-making times and lower ice-making efficiency.

[0054] To address the aforementioned technical problems, this application provides a refrigerator. To illustrate the technical solution described in this application, a detailed description is provided below with reference to specific drawings and embodiments.

[0055] like Figures 1 to 4As shown, one embodiment of this application provides a refrigerator, including a cabinet 100, an ice-making assembly 200, and a refrigerator evaporator 300. The cabinet 100 has a refrigerator compartment 101 and an installation space 102. The refrigerator compartment 101 is used to store food or other items requiring refrigeration. The ice-making assembly 200 is installed in the cabinet 100 and includes an ice maker 210, a kettle 220, and a coil 230. The kettle 220 is connected to the ice maker 210 via the coil 230, which is located within the installation space 102. The ice-making solution in the kettle 220 can be introduced into the ice maker 210 through the coil 230. The refrigerator evaporator 300 is disposed within the installation space 102 and provides cooling to the refrigerator compartment 101 and the coil 230. Optionally, the ice-making solution can be purified water, juice, or a beverage, etc.

[0056] The refrigerator provided in this application embodiment has a coil 230 installed between the ice maker 210 and the kettle 220, and the coil 230 is placed on one side of the refrigerator evaporator 300. The refrigerator evaporator 300, which provides cooling capacity to the refrigerator compartment 101, pre-cools the ice-making solution in the coil 230, thereby reducing the temperature of the ice-making solution in advance, thus shortening the ice-making time of the ice maker 210 and improving the ice-making efficiency.

[0057] In the prior art, refrigerators are typically equipped with an evaporator to provide cooling capacity to the refrigerator compartment 101. In the refrigerator provided in this embodiment, the refrigerator evaporator 300 is the same evaporator used to provide cooling capacity to the refrigerator compartment 101. Therefore, the refrigerator provided in this embodiment does not require a separate refrigeration unit for pre-cooling; instead, it directly utilizes the evaporator in the refrigerator to pre-cool the ice-making solution in the coil 230. This simplifies the structure and helps reduce production costs.

[0058] In some alternative embodiments, such as Figure 3 , Figure 5 and Figure 6 As shown, the housing 100 includes an outer casing 110, an inner casing 120, and a partition assembly 130. The inner casing 120 is installed within the outer casing 110 and forms a receiving groove 121. The partition assembly 130 is installed within the receiving groove 121. The receiving groove 121 has a bottom wall opposite its own opening, and an installation space 102 is formed between the partition assembly 130 and the bottom wall of the receiving groove 121. Figure 3 and Figure 7 As shown, at least a portion of the ice-making assembly 200 and the refrigeration evaporator 300 are disposed within the installation space 102. In this embodiment, as... Figure 5 and Figure 6As shown, in the opening direction of the receiving tank 121, the area on the side of the separating assembly 130 near the opening of the receiving tank 121 is the aforementioned refrigerator compartment 101. In one example, the coil 230 of the ice-making assembly 200 is disposed within the installation space 102. This arrangement facilitates the pre-cooling of the ice-making solution in the coil 230 by the refrigeration evaporator 300.

[0059] In one possible design, such as Figure 7 and Figure 8 As shown, the refrigerator also includes a fan 400, which is installed in the cabinet 100. The fan 400 is used to blow air from the refrigerator compartment 101 to the installation space 102. It is understood that the temperature in the refrigerator compartment 101 is typically above 0°C. Therefore, by blowing air from the refrigerator compartment 101 to the evaporator 300 and coil 230 by the fan 400, the surface of the evaporator 300 can be defrosted, and the temperature of the coil 230 can be kept above 0°C. This configuration, in addition to pre-cooling the ice-making solution in the coil 230, also effectively reduces the possibility of the ice-making solution freezing inside the coil 230.

[0060] In some embodiments, the fan 400 is mounted on the partition assembly 130. Specifically, as Figure 9 As shown, the partition assembly 130 includes a first partition 131 and a second partition 132 arranged sequentially along the opening direction of the receiving groove 121. The first partition 131 is located on the side of the second partition 132 near the opening of the receiving groove 121, and an air duct is formed between the first partition 131 and the second partition 132. An air inlet 131 is provided through the first partition 131, and a through hole 1321 communicating with the air duct is provided through the second partition 132. The air duct communicates with the aforementioned installation space 102 through the through hole 1321, and a fan 400 is installed in the through hole 1321. The fan 400 is used to create negative pressure in the air duct so that air in the refrigerator compartment 101 can enter the installation space 102 sequentially through the air inlet 1311, the air duct, and the through hole 1321 to blow air onto the refrigerator evaporator 300 and coil 230 in the installation space 102.

[0061] Optionally, the first partition 131 may be provided with multiple air inlets 1311 to improve air circulation efficiency.

[0062] In some embodiments, such as Figure 6As shown, the lower part of the partition assembly 130 is spaced apart from the bottom wall of the receiving groove 121 to form a return air vent 133 between the lower part of the partition assembly 130 and the bottom wall of the receiving groove 121. The refrigerator compartment 101 and the installation space 102 are connected through the return air vent 133. In this way, when the air in the refrigerator compartment 101 flows through the coil 230 and the refrigerator evaporator 300 driven by the fan 400, it can flow back to the refrigerator compartment 101 through the return air vent 133, thereby realizing the circulation of air.

[0063] In one possible design, such as Figure 8 As shown, coil 230 is located above the refrigeration evaporator 300. This arrangement prevents water droplets formed after defrosting of the refrigeration evaporator 300 from dripping onto coil 230. In some embodiments, such as Figure 10 As shown, a pipe clamp 800 is installed on the bottom wall of the receiving groove 121, and the coil 230 is clamped in the pipe clamp 800. The pipe clamp 800 enables the coil 230 to be stably installed in the installation space 102.

[0064] Because the temperature of the refrigerated evaporator 300 is low, air flowing through it exchanges heat with the evaporator, causing the air temperature to drop. In one possible design, the fan 400 is located above the coil 230. That is, vertically, the fan 400 is located on the side of the coil 230 away from the refrigerated evaporator 300. This arrangement allows the airflow to pass through the coil 230 first and then through the refrigerated evaporator 300, preventing the ice-making solution in the coil 230 from freezing due to an excessive temperature drop caused by the airflow passing through the evaporator 300 first.

[0065] In one possible design, the refrigerator also includes a controller and a first temperature sensor 500, which is installed on the refrigerator evaporator 300. The controller is connected to the first temperature sensor 500 and the fan 400 respectively. The first temperature sensor 500 is used to detect the temperature of the refrigerator evaporator 300 and feed the detection result back to the controller. The controller is used to control the working state of the fan 400 according to the detection result so that the temperature of the refrigerator evaporator 300 is above 0°C.

[0066] Understandably, since the ice-making solution in coil 230 mainly relies on the cooling capacity provided by the refrigeration evaporator 300 for temperature reduction, the temperature of the refrigeration evaporator 300 is less than or equal to the temperature of coil 230. Based on this setup, the controller adjusts the operating state of the fan 400 according to the detection results of the first temperature sensor 500, ensuring that the temperature of the refrigeration evaporator 300 is above 0°C. This, in turn, keeps the temperature of the ice-making solution in coil 230 above 0°C, effectively reducing the possibility of the ice-making solution freezing in coil 230.

[0067] During operation, when the first temperature sensor 500 detects that the temperature of the refrigerated evaporator 300 is lower than a second preset value, the controller controls the fan 400 to operate until the first temperature sensor 500 detects that the temperature of the refrigerated evaporator 300 is greater than or equal to the second preset value. In this embodiment, the second preset value is greater than or equal to 0°C; for example, the second preset value can be 0°C, 1°C, or 2°C, etc.

[0068] In one possible design, the refrigerator also includes a second temperature sensor disposed in the refrigerator compartment 101. The controller is also connected to the refrigerator evaporator 300 and the second temperature sensor respectively. The second temperature sensor is used to feed back a signal to the controller after detecting that the temperature in the refrigerator compartment 101 is less than or equal to a first preset value. The controller is used to control the refrigerator evaporator 300 to stop working and control the fan 400 to start working according to the signal fed back by the second temperature sensor.

[0069] According to the above technical solution, when the second temperature sensor detects that the temperature in the refrigerator compartment 101 is less than or equal to the first preset value, it indicates that the temperature in the refrigerator compartment 101 has dropped to the required temperature value. At this time, the controller can control the refrigerator evaporator 300 to stop refrigeration and control the fan 400 to start working to blow air into the installation space 102 where the refrigerator evaporator 300 and coil 230 are located. This setting ensures that the temperature of the refrigerator compartment 101 meets the requirements.

[0070] During operation, when the second temperature sensor detects that the temperature in the refrigerator compartment 101 is higher than the first preset value, the controller controls the refrigerator evaporator 300 to perform cooling (at this time, the controller controls the fan 400 to stop working), so that the refrigerator evaporator 300 continuously provides cooling to the refrigerator compartment 101 and the coil 230. When the second temperature sensor detects that the temperature in the refrigerator compartment 101 is less than or equal to the first preset value, the controller controls the refrigerator evaporator 300 to stop cooling and controls the fan 400 to start working. During the operation of the fan 400, the first temperature sensor 500 continuously monitors the temperature of the refrigerator evaporator 300. When the first temperature sensor 500 detects that the temperature of the refrigerator evaporator 300 is greater than or equal to the second preset value, the controller controls the fan 400 to stop working. In this embodiment, the first preset value is greater than or equal to the second preset value. For example, the first preset value can be 3℃, 3.5℃, or 4℃, etc.

[0071] In one possible design, at least a portion of the coil 230 extends in a serpentine pattern. This arrangement allows for a longer coil 230 within the limited installation space 102, enabling the ice-making solution to exchange heat more fully with the cooling energy generated by the refrigeration evaporator 300 as it flows through the coil 230, improving pre-cooling and thus enhancing ice-making efficiency.

[0072] In one possible design, such as Figure 7 As shown, the refrigerator also includes a water inlet pipe 930 and a filter 600. The filter 600 is installed on the water inlet pipe 930, which is connected to the kettle 220. The water inlet pipe 930 is used to supply ice-making solution to the kettle 220. By filtering the ice-making solution entering the kettle 220 through the filter 600, the quality of ice making can be improved.

[0073] In one possible design, such as Figure 1 As shown, filter 600 is installed in the refrigerator compartment 101. This arrangement ensures that the temperature of the environment in which filter 600 is located is low, allowing the ice-making solution to undergo preliminary cooling as it passes through filter 600, resulting in faster cooling and further improving ice-making efficiency.

[0074] In one possible design, such as Figure 7 and Figure 8 As shown, the refrigerator also includes a pump valve assembly 700. The kettle 220 is connected to the coil 230 through the pump valve assembly 700. The pump valve assembly 700 is used to transport the ice-making solution in the kettle 220 to the ice maker 210 along the coil 230.

[0075] In one specific embodiment, such as Figure 7 and Figure 11 As shown, the pump-valve assembly 700 has a first inlet 711 and a first outlet 712. The kettle 220 is connected to the first inlet 711 via a first pipe 910, and the first outlet 712 is connected to one end of the coil 230. The other end of the coil 230 is connected to the ice maker 210 via a second pipe 920. Driven by the pump-valve assembly 700, the ice-making solution in the kettle 220 can sequentially enter the ice maker 210 through the first pipe 910, the coil 230, and the second pipe 920.

[0076] In some embodiments, the pump valve assembly 700 is also connected to an inlet pipe 930, and the pump valve assembly 700 is also used to draw water from a source providing the ice-making solution (e.g., a water tank or other container storing the ice-making solution) through the inlet pipe 930. Specifically, as Figure 7 and Figure 11As shown, the inlet pipe 930 includes a third pipe 931 and a fourth pipe 932. One end of the third pipe 931 is connected to the inlet of the filter 600, and the other end is used to connect to the source head that provides the ice-making solution. The pump valve assembly 700 also has a second inlet 721 and a second outlet 722. The two ends of the fourth pipe 932 are connected to the second inlet 721 and the outlet of the filter 600, respectively. A fifth pipe 940 is provided between the second outlet 722 of the pump valve assembly 700 and the inlet of the kettle 220. Driven by the pump valve assembly 700, the ice-making solution can enter the kettle 220 from the source head through the third pipe 931, the filter 600, the fourth pipe 932, and the fifth pipe 940 in sequence.

[0077] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A refrigerator, characterized in that, include: The container has a refrigeration compartment and installation space; An ice-making assembly is installed in the housing. The ice-making assembly includes an ice maker, a kettle, and a coil. The kettle is connected to the ice maker through the coil. The coil is located within the installation space. The ice-making solution in the kettle can be introduced into the ice maker through the coil. A refrigerated evaporator is disposed within the installation space, the refrigerated evaporator being used to provide cooling to the refrigerated compartment and the coils.

2. The refrigerator as described in claim 1, characterized in that, The refrigerator also includes a fan, which is installed in the cabinet and is used to blow air from the refrigerator compartment toward the installation space.

3. The refrigerator as described in claim 2, characterized in that, The coil is located on the upper side of the refrigerated evaporator.

4. The refrigerator as described in claim 3, characterized in that, The fan is located on the upper side of the coil.

5. The refrigerator as described in claim 2, characterized in that, The refrigerator also includes a controller and a first temperature sensor, the first temperature sensor being installed on the refrigeration evaporator; the controller is connected to the first temperature sensor and the fan respectively, the first temperature sensor is used to detect the temperature of the refrigeration evaporator and feed the detection result back to the controller, the controller is used to control the working state of the fan according to the detection result, so that the temperature of the refrigeration evaporator is above 0°C.

6. The refrigerator as described in claim 5, characterized in that, The refrigerator also includes a second temperature sensor disposed in the refrigerator compartment. The controller is also connected to the refrigerator evaporator and the second temperature sensor respectively. The second temperature sensor is used to send a signal to the controller after detecting that the temperature in the refrigerator compartment is less than or equal to a first preset value. The controller is used to control the refrigerator evaporator to stop working and control the fan to start working according to the signal fed back by the second temperature sensor.

7. The refrigerator as described in any one of claims 1 to 6, characterized in that, The coil extends in a serpentine shape.

8. The refrigerator as described in any one of claims 1 to 6, characterized in that, The refrigerator also includes a water inlet pipe and a filter. The filter is installed on the water inlet pipe, which is connected to the kettle and is used to supply ice-making solution to the kettle.

9. The refrigerator as described in claim 8, characterized in that, The filter is located in the refrigerator compartment.

10. The refrigerator as claimed in any one of claims 1 to 6, characterized in that, The refrigerator also includes a pump valve assembly, through which the kettle is connected to the coil, and the pump valve assembly is used to transport the ice-making solution in the kettle to the ice maker along the coil.

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