Refrigerator evaporator with high-precision defrosting mechanism

Abstract

The invention relates to the technical field of refrigerator refrigeration and defrosting, in particular to a refrigerator evaporator with a high-precision defrosting mechanism, which comprises an assembly frame body mounted on a refrigerator, and fins are fixedly mounted in the assembly frame body through a coil pipe. According to the refrigerator evaporator with the high-precision defrosting mechanism, a transverse flow guide pipe internally provided with a transverse flow fan is fixedly assembled in the assembly frame and located on one side of the fins, so that the air cooling uniformity of the evaporator is greatly improved, and the air cooling effect is improved; the air outlet is formed in the inner wall of the assembly frame and located on one side of the fins, the electric control type flow guide cover is installed in the air outlet, the refrigeration mode of the refrigerator can be changed according to needs, operability is improved, and application scenes are more diversified. The temperature sensor is installed on the electric control type flow guide cover, the electric heating film is installed on the inner wall of the air outlet of the transverse flow guide pipe, and the electric heating film is automatically started according to the temperature difference of different areas, so that air heating defrosting is accurately and directionally started, and energy waste caused by large-area defrosting is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator refrigeration and defrosting, in particular to an evaporator for a refrigerator with a high-precision defrosting mechanism. Background Art

[0002] Air-cooled refrigerators use forced circulation of cold air to control the temperature inside the refrigerator, and use an evaporator for cooling. The evaporator is placed in the interlayer between the freezer and refrigerator or at the rear of the refrigerator. Since the temperature around the evaporator is very low, a single-point fan diversion design is often used. After long-term use, it is easy for frost to form on the surface of the coil or fin, seriously affecting its cooling effect. The current evaporator is heated and defrosted by a simple electric heating wire. During the heating process, the entire evaporator surface is heated, which results in a relatively large heat generation, making it impossible to perform targeted operations on the frosted area, resulting in a significant increase in energy consumption. At the same time, the refrigerator refrigeration method cannot be adjusted according to needs, resulting in limited operability and adaptability. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the current single-point fan guide design makes the coil or fin easy to frost, and the traditional defrosting wastes power consumption seriously and can only be done in a very single way.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an evaporator for a refrigerator with a high-precision defrosting mechanism, comprising an assembly frame installed on the refrigerator, fins are fixedly installed inside the assembly frame through a coil, a horizontal guide tube is fixedly installed on one side of the fins inside the assembly frame, a cross-flow fan is movably installed inside the horizontal guide tube, side guide mechanisms matching with the cross-flow fan are arranged on both sides of the assembly frame, an air outlet is arranged on the inner wall of the assembly frame on one side of the fin, an electrically controlled guide cover is installed on one side of the air outlet, a plurality of temperature sensors are installed on the electrically controlled guide cover adjacent to the fin surface, and a plurality of electric heating films matching with the temperature sensors are installed on the inner wall of the air outlet of the horizontal guide tube.

[0005] The side guide mechanism includes an arc guide pipe fixed on the inner walls of both sides of the assembly frame, an internal thread assembly blind hole opened at the air inlet position of the arc guide pipe, a detachable assembly cover screwed into the internal thread assembly blind hole through an external thread head, and a filter element installed inside the detachable assembly cover.

[0006] The electrically controlled air deflector comprises lateral assembly frames fixed on both sides of the air outlet, a turnover air deflector mounted on the inner side of the lateral assembly frame through an axis movement, and an end adjustment support rod for controlling the turnover air deflector.

[0007] An assembly groove for installing a temperature sensor is provided on the side wall of the flip guide plate adjacent to the air outlet.

[0008] The inner wall of the air outlet of the transverse air guide pipe is symmetrically provided with arc-shaped adjustment grooves, and a magnetically controlled arc-shaped air guide cover for installing an electric heating film is slidably mounted inside the arc-shaped adjustment groove.

[0009] Arc-shaped guide grooves are symmetrically provided on the inner walls on both sides of the arc-shaped adjustment groove.

[0010] The magnetically controlled arc-shaped air deflector comprises a copper cover shell with sliders on both sides, a side control seat fixed on the inner side of the copper cover shell, an embedded electromagnet fixed on the inner side of the arc-shaped adjustment groove, and an iron spring.

[0011] The temperature sensor and the electric heating film are installed at the gap positions on both sides of the fin.

[0012] The flip guide plate has an arc-shaped guide surface on the end surface adjacent to the air outlet.

[0013] A built-in flow sensor is fixedly mounted inside the arc-shaped flow guide tube and located inside the internal thread mounting blind hole.

[0014] The beneficial effects of the present invention are: (1) The refrigerator evaporator with a high-precision defrosting mechanism of the present invention has a horizontal guide tube with a built-in cross-flow fan fixedly installed on one side of the fin inside the assembly frame, which greatly improves the air cooling uniformity of the evaporator and improves the cooling effect; (2) An air outlet is provided on the inner wall of the assembly frame on one side of the fin, and an electrically controlled air guide cover is installed inside the air outlet. The refrigeration mode of the refrigerator can be changed as needed, thereby improving operability and making the application scenarios more diverse; (3) Install a temperature sensor on the electrically controlled air guide cover and an electric heating film on the inner wall of the air outlet of the horizontal air guide pipe. The electric heating film is automatically activated according to the temperature difference in different areas, thereby accurately and directional starting the air heating defrosting to avoid energy waste caused by large-area defrosting; (4) By arranging side guide mechanisms that cooperate with the cross-flow fans on both sides of the assembly frame, the space occupied on both sides can be reduced; (5) By installing a removable filter element inside the side guide mechanism, the humidity at the air inlet can be reduced, thereby avoiding the chance and possibility of frost formation; (6) The electric heating film adopts an adjustable flow guide design, which can improve the heat exchange efficiency of the air outlet while ensuring the flux during normal operation; (7) The use of air heating defrosting method can increase the defrosting area and directionality while ensuring the surface dryness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 It is a partial schematic diagram of the position of the electric heating film in the present invention. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Figure 1 , Figure 2 and Figure 3 An evaporator for a refrigerator with a high-precision defrosting mechanism is shown, comprising an assembly frame 1 installed on the refrigerator, a fin 3 is fixedly installed inside the assembly frame 1 through a coil 2, a horizontal air guide tube 4 is fixedly installed on one side of the fin 3 inside the assembly frame 1, a cross-flow fan 5 is movably installed inside the horizontal air guide tube 4, side air guide mechanisms 6 that cooperate with the cross-flow fan 5 are arranged on both sides of the assembly frame 1, an air outlet 7 is arranged on the inner wall of the assembly frame 1 on one side of the fin, an electrically controlled air guide cover 8 is installed on one side of the air outlet 7, 10 temperature sensors 9 are installed on the electrically controlled air guide cover 8 near the fin surface, and 10 electric heating films 10 that cooperate with the temperature sensor 9 are installed on the inner wall of the air outlet of the horizontal air guide tube 4.

[0022] Working principle: The cross-flow fan 5 rotates at high speed, draws air in from the side guide mechanisms 6 on both sides, then blows air from the air outlet of the horizontal guide pipe 4 to the gaps on both sides of the fins 3, and then is introduced into the freezer and refrigerator compartments by the electrically controlled air guide cover 8. When the temperature sensor 9 on the surface of the electrically controlled air guide cover 8 detects that the local temperature is higher than the ambient temperature, the temperature sensor 9 activates the electric heating film 10 at the corresponding position to increase the air temperature at that position, and then defrosts the surface of the coil 2 and the fin 3 at that position by air heating, and uses hot air to discharge the temperature, thereby increasing the temperature and air drying effect; a humidity sensor is installed on one side of the temperature sensor 9 on the surface of the electrically controlled air guide cover 8. When the humidity of the humidity sensor decreases due to air drying, the electric heating film 10 is turned off until the temperature monitored by the temperature sensor 9 on the surface of the electrically controlled air guide cover 8 returns to a consistent level.

[0023] In order to cooperate with the lateral flow guidance, the side flow guidance mechanism 6 includes an arc-shaped flow guide tube 61 fixed on the inner walls on both sides of the assembly frame 1, an internal threaded assembly blind hole opened at the air inlet position of the arc-shaped flow guide tube 61, a detachable assembly cover 62 screwed into the internal threaded assembly blind hole through an external thread head, and a filter element 63 installed inside the detachable assembly cover 62.

[0024] The filter element 63 is inserted into the detachable assembly cover 62 , and then the external thread head at the end of the detachable assembly cover 62 is screwed into the internal thread assembly blind hole, so as to be fixedly connected with the air inlet of the arc-shaped guide pipe 61 .

[0025] In order to control the opening and closing state of the air outlet 7 position on the inner wall of the assembly frame 1, the electrically controlled air deflector 8 includes a lateral assembly frame 81 fixed on both sides of the air outlet, a flip guide plate 82 installed on the inner side of the lateral assembly frame 81 through an axial movement, and an end adjustment support rod 83 for controlling the flip guide plate 82.

[0026] The end adjustment support rod 83 controls the flip guide plate 82 by extending and retracting, thereby controlling the opening and closing state of the air outlet 7 on the inner wall of the assembly frame 1 .

[0027] In order to cooperate with surface assembly, an assembly groove for mounting the temperature sensor 9 is provided on the side wall of the flip guide plate 82 adjacent to the air outlet.

[0028] The temperature sensor 9 is fixed inside the assembly groove, and can maintain integrity with the flip guide plate 82, thereby reducing surface wind resistance.

[0029] In order to cooperate with lateral control, arc-shaped adjustment grooves 11 are symmetrically arranged on the inner wall of the air outlet of the transverse guide pipe 4, and a magnetically controlled arc-shaped guide cover 12 for installing the electric heating film 10 is slidably mounted inside the arc-shaped adjustment groove 11.

[0030] In order to facilitate assembly and adjustment on both sides, arc-shaped guide grooves are symmetrically provided on the inner walls on both sides of the arc-shaped adjustment groove 11 .

[0031] In order to cooperate with the magnetic control adjustment, the magnetic control arc deflector 12 includes a copper cover shell 122 with sliders 121 on both sides, a side control seat 123 fixed on the inner side of the copper cover shell 122, an embedded electromagnet 124 fixed on the inner side of the arc adjustment groove 11, and an iron spring 125.

[0032] The two ends of the iron spring 125 are respectively installed on the side control seat 123 and the surface of the embedded electromagnet 124. The embedded electromagnet 124 is started to control the iron spring 125. By controlling the contraction of the iron spring 125, the gap between the side control seat 123 and the embedded electromagnet 124 is controlled, and the copper cover shell 122 is controlled to slide and adjust along the arc guide groove. At this time, the copper cover shells 122 on both sides of the air outlet of the horizontal guide pipe 4 slide and extend into the air outlet position of the horizontal guide pipe 4. At this time, the electric heating film 10 is started to heat the copper cover shell 122. At this time, the heating area can be increased and the heating effect can be improved.

[0033] In order to achieve the air cooling effect, the temperature sensor 9 and the electric heating film 10 are installed at the gaps on both sides of the fin 3 .

[0034] In order to ensure the flow guiding property of the flip guide plate 82 at the air outlet and reduce wind resistance, the flip guide plate 82 has an arc-shaped flow guiding surface near the end surface of the air outlet.

[0035] The cross-flow fan 5 inside the transverse air guide 4 rotates at a high speed, and the air is drawn into the transverse air guide 4 through the side air guide mechanisms 6 on both sides, and then the cross-flow fan 5 is used to blow the drawn air through the air outlet of the transverse air guide 4 to the gaps on both sides of the fins 3, and then the air passes through the coil 2 and the fins 3 to be cooled, and then blown to the temperature sensor 9 on the surface of the electrically-controlled air guide cover 8, and the arc-shaped guide surface on the surface of the electrically-controlled air guide cover 8 is used to guide the air outward to lower the temperature of the freezer compartment, and the electrically-controlled air guide cover 8 is turned over to cool the refrigerator compartment, and the temperature regulation of the refrigerator compartment can be guaranteed at this time; when the freezer compartment needs air cooling regulation and the refrigerator compartment needs direct cooling regulation, at this time, it is only necessary to close the air outlet 7 through the electrically-controlled air guide cover 8, and at this time, the isolation between the freezer compartment and the refrigerator compartment can be guaranteed.

[0036] In order to detect the air inlet flow in real time, a built-in flow sensor 64 is fixedly mounted inside the arc-shaped flow guide tube 61 and located inside the internal thread assembly blind hole.

[0037] When the flow rate detected by the built-in flow sensor 64 gradually decreases, it means that a large amount of impurities or liquids are adsorbed inside the filter element 63 and it needs to be replaced. Then, an early warning reminder is issued through the built-in flow sensor 64 to facilitate the reminder of replacement.

[0038] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An evaporator for a refrigerator with a high-precision defrosting mechanism, comprising an assembly frame (1) mounted on the refrigerator, wherein: The assembly frame (1) is fixedly provided with a fin (3) via a coil (2), the assembly frame (1) is fixedly provided with a transverse guide tube (4) on one side of the fin (3), the transverse guide tube (4) is movably provided with a cross-flow fan (5), both sides of the assembly frame (1) are provided with side guide mechanisms (6) that cooperate with the cross-flow fan (5), the inner wall of the assembly frame (1) is provided with an air outlet (7) on one side of the fin (3), an electrically controlled air guide cover (8) is installed on one side of the air outlet (7), a plurality of temperature sensors (9) are installed on the surface of the electrically controlled air guide cover (8) adjacent to the fin (3), and a plurality of electric heating films (10) that cooperate with the temperature sensors (9) are installed on the inner wall of the air outlet of the transverse guide tube (4).

2. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 1, characterized in that: The side-mounted flow guide mechanism (6) comprises an arc-shaped flow guide tube (61) fixed on the inner walls of both sides of the assembly frame (1), an internal thread assembly blind hole provided at the air inlet position of the arc-shaped flow guide tube (61), a detachable assembly cover (62) screwed into the internal thread assembly blind hole through an external thread head, and a filter element (63) installed inside the detachable assembly cover (61).

3. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 1, characterized in that: The electrically controlled air deflector (8) comprises a lateral assembly frame (81) fixed on both sides of the air outlet (7), a flip air deflector (82) mounted on the inner side of the lateral assembly frame (81) via an axis, and an end adjustment support rod (83) for controlling the flip air deflector (82).

4. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 3, characterized in that: An assembly groove for mounting a temperature sensor (9) is provided on the side wall of the flip guide plate (82) adjacent to the air outlet.

5. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 1, characterized in that: The inner wall of the air outlet of the transverse air guide pipe (4) is symmetrically provided with an arc-shaped adjustment groove (11), and a magnetically controlled arc-shaped air guide cover (12) for installing the electric heating film (10) is slidably mounted inside the arc-shaped adjustment groove (11).

6. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 5, characterized in that: Arc-shaped guide grooves are symmetrically provided on the inner walls on both sides of the arc-shaped adjustment groove (11).

7. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 6, characterized in that: The magnetically controlled arc-shaped flow deflector (12) comprises a copper cover shell (122) having sliders (121) on both sides, a side control seat (123) fixed on the inner side of the copper cover shell (122), an embedded electromagnet (124) fixed on the inner side of the arc-shaped adjustment groove (11), and an iron spring (125).

8. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 1, characterized in that: The temperature sensor (9) and the electric heating film (10) are installed at the gap positions on both sides of the fin (3).

9. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 3, characterized in that: The flip guide plate (82) has an arc-shaped guide surface on the end surface adjacent to the air outlet.

10. The refrigerator evaporator with a high-precision defrosting mechanism according to claim 2, characterized in that: A built-in flow sensor (64) is fixedly mounted inside the arc-shaped flow guide tube (61) and located inside the internal thread assembly blind hole.

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