CN113357849A

CN113357849A - Evaporator and refrigeration equipment

Info

Publication number: CN113357849A
Application number: CN202010152232.4A
Authority: CN
Inventors: 裴玉哲; 王定远; 徐佳
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2021-09-07

Abstract

The application relates to the technical field of heat transfer, discloses an evaporimeter, includes: a blow-up plate; the refrigerant pipe penetrates through the blowing plate; the first electromagnetic valve is arranged at a refrigerant inlet of the evaporator; the second electromagnetic valve is arranged at a refrigerant outlet of the evaporator; the electromagnetic heating element comprises an electromagnetic heating pipe and a coil arranged outside the electromagnetic heating pipe, the electromagnetic heating pipe is communicated with the refrigerant pipe, and the electromagnetic heating element is arranged at the refrigerant inlet or the refrigerant outlet. The electromagnetic heating element that this disclosed embodiment provided, in the process of defrosting the evaporimeter, the vast majority of heats that make the electromagnetic heating element produce all act on the evaporimeter, and few heat loss has improved the speed of defrosting. The application also discloses a refrigeration device.

Description

Evaporator and refrigeration equipment

Technical Field

The application relates to the technical field of heat exchange, for example to an evaporator and refrigeration equipment.

Background

At present, an electric heating pipe is mostly adopted to defrost an evaporator. The defrosting of the electric heating pipe is to defrost the evaporator by means of the heat radiation of the electric heating pipe. The electric heating device is characterized in that a resistor with proper power is installed on an evaporator of household appliances such as a refrigerator, when frost is accumulated on the evaporator seriously and the using effect of the household appliances such as the refrigerator is influenced, the electric heating tube is started, the resistance wire of the electric heating tube is electrified to generate heat, and then the outer surface of the evaporator is defrosted.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: when the electric heating pipe is adopted to defrost the evaporator, the defrosting speed is low, and the time and the energy consumption are more.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an evaporator and refrigeration equipment, which are used for solving the problems that an electric heating tube type defrosting device of the existing evaporator is low in defrosting speed and consumes more time and energy.

In some embodiments, the evaporator comprises: a blow-up plate; the refrigerant pipe penetrates through the blowing plate; the first electromagnetic valve is arranged at a refrigerant inlet of the evaporator; the second electromagnetic valve is arranged at a refrigerant outlet of the evaporator; the electromagnetic heating element comprises an electromagnetic heating pipe and a coil arranged outside the electromagnetic heating pipe, the electromagnetic heating pipe is communicated with the refrigerant pipe, and the electromagnetic heating element is arranged at the refrigerant inlet or the refrigerant outlet.

In some embodiments, the refrigeration appliance comprises the aforementioned evaporator.

The evaporator and the refrigeration equipment provided by the embodiment of the disclosure can realize the following technical effects:

when the electric heating pipe is adopted to defrost the evaporator, one part of heat generated by the electric heating pipe acts on the surface of the evaporator to defrost a frost layer on the surface of the evaporator, however, a large part of heat is dispersed around the evaporator and cannot directly act on the evaporator, so that the electric heating pipe is used for defrosting the evaporator, the heat loss of the electric heating pipe is serious, the consumed time and the energy are more, and the defrosting speed is low.

The evaporator provided by the embodiment of the disclosure is provided with an electromagnetic heating element which comprises an electromagnetic heating pipe and a coil arranged outside the electromagnetic heating pipe, wherein the electromagnetic heating pipe is communicated with a refrigerant pipe of the evaporator. When the evaporator needs to be defrosted, the electromagnetic heating element heats the refrigerant at the electromagnetic heating pipe, heat is transferred to the refrigerant at the refrigerant pipe of the evaporator, and the heat of the high-temperature refrigerant flowing in the refrigerant pipe defrosts the whole evaporator. The electromagnetic heating element that this disclosed embodiment provided, in the process of defrosting the evaporimeter, the vast majority of heats that make the electromagnetic heating element produce all act on the evaporimeter, and few heat loss has improved the speed of defrosting.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of an evaporator provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an electromagnetic heating element provided in an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of another evaporator provided by the disclosed embodiment;

FIG. 4 is a schematic structural diagram of another evaporator provided by the disclosed embodiment;

FIG. 5 is a schematic structural diagram of another evaporator provided by the disclosed embodiment;

fig. 6 is a schematic diagram of a refrigeration apparatus provided by an embodiment of the present disclosure.

Reference numerals:

1: an evaporator; 11: a blow-up plate; 12: a refrigerant pipe; 13: an electromagnetic heating element; 131: an electromagnetic heating pipe; 132: a coil; 141: a refrigerant inlet; 142: a refrigerant outlet; 151: a first solenoid valve; 152: a second solenoid valve; 153: a third electromagnetic valve; 16: a fin set; 2: a compressor; 3: a four-way valve; 4: a condenser; 5: a condenser fan; 6: a capillary tube; 7: an evaporator fan.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

The disclosed embodiment provides an evaporator, including: a blow-up plate; the refrigerant pipe penetrates through the blowing plate; the first electromagnetic valve is arranged at a refrigerant inlet of the evaporator; the second electromagnetic valve is arranged at a refrigerant outlet of the evaporator; the electromagnetic heating element comprises an electromagnetic heating pipe and a coil arranged outside the electromagnetic heating pipe, the electromagnetic heating pipe is communicated with the refrigerant pipe, and the electromagnetic heating element is arranged at the refrigerant inlet or the refrigerant outlet.

As shown in fig. 1 and 2, an evaporator 1 provided in an embodiment of the present disclosure includes an expansion plate 11 and a refrigerant pipe 12 penetrating the expansion plate 11. The evaporator 1 provided by the embodiment of the present disclosure is provided with the electromagnetic heating element 13, and the electromagnetic heating pipe 131 of the electromagnetic heating element 13 is communicated with the refrigerant pipe 12 of the evaporator, so as to heat the refrigerant in the evaporator 1.

When the evaporator 1 needs defrosting, the electromagnetic heating element 13 is turned on, the temperature of the refrigerant at the electromagnetic heating pipe 131 is raised by electromagnetic induction, and after the temperature of the refrigerant at the electromagnetic heating pipe 131 is raised, a temperature difference is generated between the refrigerant and the refrigerant at the refrigerant pipe 12, so that the refrigerant flows relatively, and further, the electromagnetic heating element 13 continuously heats the refrigerant in the evaporator 1, so that the high-temperature refrigerant flows through the whole evaporator 1, and defrosting of the evaporator 1 is realized. In the evaporator 1 provided by the embodiment of the present disclosure, the heat of the electromagnetic heating element 13 is mostly used for heating the refrigerant in the evaporator 1, so that the utilization rate of the heat is improved, the heat loss is reduced, and the defrosting speed is improved.

When the evaporator needs defrosting, the first electromagnetic valve and the second electromagnetic valve are closed, and the refrigerant is intercepted in the evaporator. The refrigerant pipe of the evaporator becomes a heat pipe which is sealed at a refrigerant inlet and a refrigerant outlet and is filled with a refrigerant, the electromagnetic heating element is started to heat and defrost the evaporator, and optionally, the first electromagnetic valve and the second electromagnetic valve are stop valves.

The electromagnetic heating element 13 provided by the embodiment of the disclosure is fast in hot start, and is shortened by more than 60% compared with the existing heating mode of an electric heating pipe; meanwhile, the heat utilization rate is up to more than 90%, and the energy is saved by 30-70% compared with the conventional electric heating tube heating mode.

The electromagnetic heating element 13 comprises an electromagnetic heating pipe 131 and a winding coil 132 arranged outside the electromagnetic heating pipe, wherein the electromagnetic heating pipe 131 is communicated with the refrigerant pipe 12 of the evaporator to form a part of a refrigerant flowing pipeline of the refrigeration system; optionally, the coil 132 is disposed on the outer surface of the electromagnetic heating tube 131, but is not in direct contact with the outer surface of the electromagnetic heating tube 131, that is, there is a gap or distance between the coil 132 and the outer surface of the electromagnetic heating tube 131, so as to prevent unsafe heating. The coil 132 is energized to generate an alternating magnetic field, and the electromagnetic heating tube 131 cuts alternating magnetic lines of force to generate turbulent flow in the tube to perform enhanced heat transfer. Optionally, the Electromagnetic shielding material is disposed on the outer surface of the Electromagnetic heating element 13 to prevent the Electromagnetic heating element 13 from affecting the overall Electromagnetic Compatibility (EMC) of the household electrical appliance, and optionally, the Electromagnetic shielding material may be an Electromagnetic shielding coating paint applied on the outer surface of the Electromagnetic heating element. The electromagnetic shielding material can also be an electromagnetic shielding sleeve sleeved on the outer surface of the electromagnetic heating element, and the electromagnetic shielding sleeve can be made of electromagnetic shielding plastic, intrinsic conductive high polymer or conductive fabric and the like; optionally, the outer surface of the electromagnetic heating element 13 is coated with a corrosion-resistant material to prevent rust corrosion of the electromagnetic heating element 13. The coil 132 does not generate heat, the thermal hysteresis is small, the thermal inertia is low, the temperatures of the inner wall and the outer wall of the charging barrel are consistent, and the temperature control is real-time and accurate.

The electromagnetic heating element is disposed at the refrigerant inlet 141 or the refrigerant outlet 142. The number of the electromagnetic heating elements is not limited in the embodiments of the present disclosure, for example, the evaporator may include two electromagnetic heating elements, a first electromagnetic heating element disposed at the refrigerant inlet 141 and a second electromagnetic heating element disposed at the refrigerant outlet 142. The two electromagnetic heating elements are adopted to heat the refrigerant in the refrigerant pipe of the evaporator at the same time, so that the defrosting efficiency of the evaporator is improved, and the time of a defrosting mode is shortened.

Optionally, the electromagnetic heating tube 131 is made of iron. The iron electromagnetic heating pipe 131 cuts the alternating magnetic induction lines generated by the coil, so that the inner side of the iron electromagnetic heating pipe 131 generates heat, and the heat is transferred to the refrigerant at the electromagnetic heating pipe 131, thereby improving the heat transfer effect.

At present, an external frost layer of an evaporator is heated first, namely, the defrosting sequence of the electric heating tube defrosting is from outside to inside. Different from an electric heating pipe, in the electromagnetic heating element provided by the embodiment of the disclosure, the heat of a high-temperature refrigerant in an evaporator is transferred from inside to outside, and a blowing plate of the evaporator and a frost layer of the innermost layer of a refrigerant pipe firstly exchange heat with the high-temperature refrigerant, namely, the defrosting sequence is from inside to outside, so that the heat loss of the high-temperature refrigerant is prevented, and the effective utilization rate of the heat generated by the electromagnetic heating element is improved; the frost layer attached to the surface of the evaporator and the contact part of the blowing plate and the refrigerant pipe starts to melt first, so that the adhesion force of the frost layer on the surface of the evaporator is reduced due to the gravity action of the frost layer, and the frost layer is favorably fallen from the surface of the evaporator from top to bottom. Optionally, the surface of the evaporator is coated with a hydrophobic coating to keep the surface of the evaporator dry and free of water, thereby improving defrosting efficiency. Optionally, the surface of the evaporator is coated with a graphene coating, and the graphene coating has certain hydrophobic property and enhanced heat exchange capacity, so that the defrosting speed is increased.

Optionally, the inner diameter of the electromagnetic heating tube 131 of the electromagnetic heating element is greater than or equal to the inner diameter of the refrigerant tube 12. Therefore, the smooth flowing of the refrigerant in the evaporator 1 is improved, and the heat exchange effect of the evaporator 1 is improved.

Optionally, the electromagnetic heating tube 131 is welded to the refrigerant tube 12. The connection stability of the electromagnetic heating pipe and the refrigerant pipe is improved.

Optionally, the electromagnetic heating element 13 is disposed at the refrigerant inlet and behind the first electromagnetic valve 151; alternatively, the electromagnetic heating element 13 is disposed at the refrigerant outlet and in front of the second electromagnetic valve 152. The "electromagnetic heating element is disposed behind the first electromagnetic valve" here can be understood as that, when the refrigerator does not defrost but performs a refrigeration cycle, the refrigerant flows through the first electromagnetic valve 151 first and then flows through the electromagnetic heating element 13; the phrase "the electromagnetic heating element is disposed in front of the second electromagnetic valve" can be understood to mean that, when the refrigerator does not defrost but performs a refrigeration cycle, the refrigerant firstly flows through the electromagnetic heating element 13 and then flows through the second electromagnetic valve 152, as shown in fig. 6, so that, when defrosting is performed, the electromagnetic heating element 13 and the refrigerant pipe 12 of the evaporator are cut off by the first electromagnetic valve 151 and the second electromagnetic valve 152 into a refrigerant pipeline which is closed when defrosting.

Optionally, the electromagnetic heating element is disposed at the refrigerant inlet, and the refrigerant inlet is disposed at the lower portion of the blowing plate; or the electromagnetic heating element is arranged at the refrigerant outlet, and the refrigerant outlet is arranged at the lower part of the blowing plate.

The refrigerant inlet 141 or the refrigerant outlet 142 is disposed at a lower portion of the expansion plate 11, and it is understood that the refrigerant inlet 141 or the refrigerant outlet 142 is not disposed in the expansion plate 11 and is disposed at a lower portion of the expansion plate 11 in position when the evaporator is in a use state. An electromagnetic heating element 13 is also provided at the lower portion of the inflation plate 11, as shown in fig. 1.

When the evaporator is in a use state, the electromagnetic heating element 13 is arranged at the lower part of the inflation plate 11, due to the action of gravity, liquid refrigerants in gas-liquid two-phase refrigerants in the evaporator 1 are located at the lower part of the evaporator 1, the electromagnetic heating element 13 heats the liquid refrigerants, the refrigerants absorb heat and vaporize and rise, the cold energy is absorbed in the rising process, namely heat dissipation is carried out, the refrigerants absorbing the cold energy are changed into liquid, then are liquefied and sink to the bottom of the evaporator 1, and heat circulation is formed between the upper part and the lower part in the evaporator 1, so that the defrosting speed of a refrigerant pipe 12 of the evaporator 1 and a frost layer on the surface of the inflation plate 11 is increased.

Optionally, the evaporator further includes a communication pipe communicating the refrigerant inlet and the refrigerant outlet of the evaporator, and the electromagnetic heating element is disposed in the communication pipe.

As shown in fig. 3, the communicating pipe communicates the refrigerant inlet and the refrigerant outlet of the evaporator, so that the refrigerant pipeline of the evaporator forms a closed loop, when the electromagnetic heating element 13 is used for defrosting the evaporator, the refrigerant heated by the electromagnetic heating element 13 becomes gaseous, and enters the refrigerant pipe 12 arranged in the blowing plate through the refrigerant inlet or the refrigerant outlet, the gaseous refrigerant forms a pressure difference in the closed loop, the gaseous refrigerant pushes the liquid refrigerant to flow in the refrigerant pipe 12 of the evaporator, so that the refrigerant in the closed loop circularly flows between the refrigerant inlet and the refrigerant outlet, and the defrosting efficiency of the electromagnetic heating element 13 on the evaporator is improved. Optionally, the inner diameter of the electromagnetic heating tube 131 of the electromagnetic heating element 13 is greater than the inner diameter of the refrigerant tube 12 penetrating through the expansion plate, and the inner diameter of the electromagnetic heating tube 131 is greater than the inner diameters of the refrigerant inlet 141 and the refrigerant outlet 142 of the evaporator, so that the refrigerant quantity heated by the electromagnetic heating element 13 is increased, the pressure difference in the closed loop is increased, and the defrosting efficiency of the evaporator is increased. Optionally, the electromagnetic heating tube 13 includes a first nozzle communicated with the refrigerant inlet 141 and a second nozzle communicated with the refrigerant outlet 142, and an inner diameter of the first nozzle is different from an inner diameter of the second nozzle, so as to facilitate forming a refrigerant circulation flow path in a specified direction in the closed loop of the evaporator.

Alternatively, the communicating tube is provided at a lower portion of the inflation plate.

The communicating pipe is disposed at the lower portion of the blowing plate, and communicates the refrigerant inlet and the refrigerant outlet disposed at the lower portion of the blowing plate, as shown in fig. 3, and the electromagnetic heating element 13 is also disposed at the lower portion of the blowing plate. The electromagnetic heating element 13 heats the refrigerant in the electromagnetic heating pipe, the heated refrigerant becomes gaseous, the electromagnetic heating element 13 is arranged at the lower part of the blowing plate, the gaseous refrigerant is favorable for rising in the refrigerant pipe, the liquid refrigerant flows downwards under the action of gravity, and the circulation fluidity of the refrigerant in the closed loop is improved.

Optionally, the evaporator further comprises a third solenoid valve disposed in the communication pipe.

The evaporator further comprises a third electromagnetic valve arranged on the communicating pipe. When the refrigerator is in a normal refrigeration mode, controlling to open the first electromagnetic valve and the second electromagnetic valve and close the third electromagnetic valve to enable a refrigerant to perform refrigeration cycle; when the evaporator needs defrosting and the frost is in a defrosting mode, the first electromagnetic valve and the second electromagnetic valve are controlled to be closed, the third electromagnetic valve is controlled to be opened, so that part of refrigerant circularly flows in the closed loop, and the evaporator is defrosted. Optionally, the third solenoid valve is a shut-off valve.

Optionally, the evaporator further comprises a fin set disposed on a side of the blowing plate.

As shown in fig. 4 and 5, the fin group is arranged on the side surface of the blowing plate, so that the heat exchange efficiency of the evaporator is improved. Optionally, the fin set is a folded fin, welded or glued to one side of the blowing plate.

The embodiment of the disclosure also provides a refrigeration device comprising the evaporator.

Alternatively, the refrigerating apparatus may be a refrigerator, an ice chest, or the like, and as shown in fig. 6, the refrigerating apparatus includes an evaporator 1, a compressor 2, a four-way valve 3, a condenser 4, a condenser fan 5, a capillary tube 6, an evaporator fan 7, an electromagnetic heating element 13, a first solenoid valve 151, and a second solenoid valve 152.

When the evaporator needs to be defrosted, the first electromagnetic valve 151 and the second electromagnetic valve 152 are closed, part of the refrigerant is intercepted in the evaporator, the electromagnetic heating element 13 is opened to heat the refrigerant intercepted in the evaporator, and then the evaporator is defrosted.

The defrosting method of the refrigerator provided by the embodiment of the disclosure comprises the following steps:

s01, turning off the compressor after the refrigerator enters the defrosting mode;

s02, closing the first electromagnetic valve and the second electromagnetic valve, and opening the third electromagnetic valve;

s03, closing a first air door of the evaporator chamber leading to a freezing chamber of the refrigerator and a second air door of the evaporator chamber leading to a refrigerating chamber, and when defrosting is carried out, raising the temperature of the evaporator chamber to prevent the temperature of the freezing chamber and the refrigerating chamber of the refrigerator from being influenced;

and S04, turning on the electromagnetic heating element to defrost the evaporator.

When the existing electric heating pipe is used for defrosting, the heat generated by the electric heating pipe can increase the temperature in the refrigerator simultaneously in the heating process of the electric heating pipe. Therefore, when the defrosting process is terminated and the refrigerating cycle process is operated at an initial stage, the refrigerating load of the refrigerator is increased, and the load of the evaporator is increased, thereby reducing the cooling efficiency of the refrigerator. The electromagnetic heating element provided by the embodiment of the disclosure closes the first air door and the second air door when defrosting the evaporator, the heat dissipated into the compartment is less, the temperature rise of the compartment is small, the energy consumption for recovering the temperature of the compartment after defrosting is finished is low, and the cooling efficiency of the refrigerator is ensured.

Meanwhile, the electromagnetic heating element 13 is an internal heating mode, heat is basically not dissipated, the heat is gathered in the electromagnetic heating pipe 131, the surface temperature of the coil 132 is slightly higher than the room temperature, high-temperature protection is not needed, and safety and reliability are achieved.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An evaporator, comprising:

a blow-up plate;

the refrigerant pipe penetrates through the blowing plate;

the first electromagnetic valve is arranged at a refrigerant inlet of the evaporator;

the second electromagnetic valve is arranged at a refrigerant outlet of the evaporator;

the electromagnetic heating element comprises an electromagnetic heating pipe and a coil arranged outside the electromagnetic heating pipe, the electromagnetic heating pipe is communicated with the refrigerant pipe,

the electromagnetic heating element is arranged at the refrigerant inlet or the refrigerant outlet.

2. An evaporator according to claim 1,

the electromagnetic heating element is arranged at the refrigerant inlet and behind the first electromagnetic valve; alternatively, the first and second electrodes may be,

the electromagnetic heating element is arranged at the refrigerant outlet and in front of the second electromagnetic valve.

3. An evaporator according to claim 1,

the electromagnetic heating element is arranged at the refrigerant inlet, and the refrigerant inlet is arranged at the lower part of the blowing plate; alternatively, the first and second electrodes may be,

the electromagnetic heating element is arranged at the refrigerant outlet, and the refrigerant outlet is arranged at the lower part of the blowing plate.

4. An evaporator according to claim 1,

the first electromagnetic valve is a stop valve; and/or the presence of a gas in the gas,

the second electromagnetic valve is a stop valve.

5. An evaporator according to claim 1, further comprising:

a communicating pipe for communicating the refrigerant inlet and the refrigerant outlet of the evaporator,

the electromagnetic heating element is arranged on the communicating pipe.

6. An evaporator according to claim 5,

the communicating pipe is arranged at the lower part of the blowing plate.

7. An evaporator according to claim 5, further comprising:

and the third electromagnetic valve is arranged on the communicating pipe.

8. An evaporator according to claim 7,

the third electromagnetic valve is a stop valve.

9. An evaporator according to any one of claims 1 to 8 further comprising:

and the fin group is arranged on the side surface of the blowing plate.

10. A refrigeration device comprising an evaporator according to any of claims 1 to 9.