CN219454105U - Air conditioner - Google Patents

Abstract

The application discloses an air conditioner belongs to air treatment technical field. An air conditioner includes: the electric appliance box is provided with a heat dissipation hole, and a heating element is arranged in the electric appliance box; the refrigerant heat dissipation assembly is arranged on the electrical box and is provided with a through air flow channel for cooling air flowing through the air flow channel; the heat radiation fan is arranged on the electrical box corresponding to the heat radiation hole; the heat radiation fan and the refrigerant heat radiation assembly are positioned at two sides of the heating component; under the action of the heat radiation fan, after the air flow is cooled at the refrigerant heat radiation assembly, the air flow flows through the heat generating component and takes away the heat of the heat generating component, and the heat is blown out from the heat radiation hole. The air conditioner effectively reduces the temperature in the electric appliance box through the air cooling and refrigerant heat dissipation dual temperature control structure, and has the advantages of good heat dissipation effect and high heat dissipation efficiency.

Description

Air conditioner

Technical Field

The application relates to the technical field of air treatment, in particular to an air conditioner.

Background

In the running process of the outdoor unit of the air conditioner, the electric control system has a heating problem, and the over-high temperature in the electric box can cause failure of components or risk of fire, so that the electric box must be effectively cooled. At present, two common heat dissipation modes are adopted, one is air cooling, for example, an external fan is used for constructing an air duct to ensure ventilation and heat dissipation of an electric box, or a fan is arranged in an electric control system; the other is to dissipate heat by using the refrigerant of the whole machine.

However, the electric box is cooled by simply relying on the air quantity generated by a fan or the refrigerant of the whole machine, and only the heat dissipation requirement under the ordinary ambient temperature condition can be met; in recent years, with the rise of the ambient temperature, the phenomenon of protection shutdown is more and more caused by the overhigh ring temperature.

Disclosure of Invention

The application provides an air conditioner, through forced air cooling and radiating dual accuse temperature structure of refrigerant, effectively reduced the interior temperature of electrical apparatus box, have radiating effect good, radiating efficiency's advantage.

An air conditioner, comprising: the electric appliance box is provided with a heat dissipation hole, and a heating element is arranged in the electric appliance box; the refrigerant heat dissipation assembly is arranged on the electric box and provided with a through air flow channel for cooling air flow flowing through the air flow channel; the heat radiation fan is arranged on the electric box corresponding to the heat radiation hole; the heating element is positioned between the refrigerant heat radiation assembly and the heat radiation fan; under the action of the heat radiation fan, the air flow is cooled at the refrigerant heat radiation assembly, flows through the heating element and takes away the heat of the heating element, and is blown out from the heat radiation hole.

The air conditioner of this application sets up radiator fan and refrigerant cooling module respectively in the electrical apparatus box both sides of components and parts that generate heat, under radiator fan's effect, when the air current when refrigerant cooling module, the air current is cooled down, can more take away the heat that the components and parts produced that generate heat when the air current of lower temperature passes through the components and parts that generate heat to maintain the temperature of components and parts that generate heat in operating temperature range, avoid the high temperature to lead to shutting down in the electrical apparatus box.

Compared with the problem that the fan of utilizing the off-premises station is forced air cooled or simply relies on the refrigerant to dispel the heat and cause poor radiating effect among the prior art, this application is through setting up radiator fan and refrigerant radiating component in the electrical apparatus box, will initiative forced air cooling and refrigerant heat dissipation combine together, and refrigerant radiating component reduces air current temperature, and radiator fan makes low temperature air current pass through heating element to take away heat, have better radiating effect.

In the prior art, the refrigerant radiator always contacts with the heating components to radiate heat, when the layout of the heating components is dispersed, the refrigerant radiator is larger and occupies more space, the refrigerant radiating component does not need to contact with the heating components, and the low-temperature air flow passing through the refrigerant radiating component can be blown to the heating components by using the fan, so that the size of the refrigerant radiating component is smaller than that of the heating components, and the refrigerant radiating component has the advantages of small volume and compact structure.

In some embodiments, the electrical box further comprises: the air outlet duct is connected to the outer side of the electrical box corresponding to the radiating hole and is used for guiding airflow to flow; the air flow from the heat dissipation holes flows out along the air outlet air duct.

In some embodiments, the heat dissipation fan and the refrigerant heat dissipation assembly are located on two sides of the electrical box in the length direction.

In some embodiments, a refrigerant heat dissipating assembly includes: a fin plate having a plurality of fins, the spaces between the fins forming air flow channels; the radiating pipes are divided into a plurality of sections and respectively penetrate through the fin plates.

In some embodiments, the radiating pipe includes: a main liquid inlet pipe and a main liquid return pipe; the N liquid inlet separating pipes are connected with the main liquid inlet pipe and penetrate through the fin plates at intervals; the N liquid return separating pipes are connected with the main liquid return pipe and penetrate through the fin plates at intervals; wherein N is an integer not less than 2.

In some embodiments, the primary feed and return tubes are located on the same side of the fin plate.

In some embodiments, the cooling medium heat dissipation component is connected to a side wall of the electrical box, and the heat dissipation tube is located at an outer side of the electrical box.

In some embodiments, an outdoor heat exchanger, an indoor unit and a gas-liquid separator are arranged on a refrigerant circulation loop of the air conditioner;

the liquid inlet end of the refrigerant heat dissipation assembly is connected between the outdoor heat exchanger and the indoor unit, and the liquid return end of the refrigerant heat dissipation assembly is connected to the input end of the gas-liquid separator.

In some embodiments, further comprising: the temperature sensor is arranged in the electrical box and used for detecting the temperature in the electrical box; and the controller is used for controlling the rotating speed of the heat radiation fan according to the temperature detected by the temperature sensor.

In some embodiments, the heat dissipation fan is an axial flow fan.

Drawings

FIG. 1 illustrates a schematic diagram of an air conditioner according to some embodiments;

FIG. 2 illustrates a partial schematic view of an air conditioner according to some embodiments;

FIG. 3 illustrates a schematic diagram of an electrical box in an air conditioner according to some embodiments;

fig. 4 illustrates a cross-sectional view of an electrical box in an air conditioner according to some embodiments;

fig. 5 illustrates an exploded view of an electrical box in an air conditioner according to some embodiments;

fig. 6 illustrates an internal schematic view of an electrical box in an air conditioner according to some embodiments;

FIG. 7 illustrates a schematic diagram of a cold heat sink assembly in an air conditioner in accordance with some embodiments;

fig. 8 illustrates a cross-sectional view of an electrical box in an air conditioner according to further embodiments;

FIG. 9 shows an enlarged view of FIG. 8A;

FIG. 10 illustrates a schematic diagram of a refrigerant circulation circuit of an air conditioner according to some embodiments;

in the above figures, 1, a housing; 2. an electrical box; 21. a base; 22. a box cover; 221. an outer wall; 222. an inner wall; 223. a retaining wall; 23. an accommodation space; 24. a heat radiation hole; 25. a mounting port; 26. an air outlet duct; 27. an air guide cavity; 271. a vent; 272. wind-guiding rib sheets; 273. an air guide channel; 3. a heating element; 4. a heat radiation fan; 5. a refrigerant heat dissipation assembly; 51. a fin plate; 511. a fin section; 512. a connection part; 52. a heat radiating pipe; 521. a main liquid inlet pipe; 522. a connecting pipe is penetrated; 523. a main liquid return pipe; 524. a liquid separating and feeding pipe; 525. a connecting pipe; 526. a liquid separating and returning pipe; 53. an air flow channel.

Detailed Description

For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.

The compressor compresses refrigerant gas in a low-temperature and low-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.

An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.

Referring to fig. 1 and 2, an air conditioner according to an embodiment of the present application includes a housing 1 and an electrical box 2.

The casing 1 may form an overall exterior appearance of the outdoor unit of the air conditioner, in which a receiving space is defined, and a partition plate is provided in the casing 1 and divides the receiving space into a fan chamber and a press chamber. Specifically, the case 1 may include a front panel, a rear panel disposed rearward of the front panel, a pair of side panels disposed between the front panel and the rear front face, a top plate disposed above the pair of side panels, and a bottom plate disposed below the pair of side panels.

The electrical box 2 is mounted in the press cavity of the housing 1 by means of a form such as a screw or a buckle for realizing an electrical control function of the air conditioner.

Referring to fig. 3 to 6, the electrical box 2 has a substantially rectangular parallelepiped shape, and includes a base 21 and a box cover 22.

The base 21 is mainly a structural support and structural accommodating part of the electrical box 2, and has an accommodating space 23 with one end opened, and the box cover 22 is arranged at the opening of the base 21 in a covering manner for closing the base 21 so as to seal the electrical box 2.

The heat generating component 3 is installed in the accommodation space 23 of the base 21, and the heat generating component 3 generates heat when the air conditioner is operated.

The electrical box 2 further comprises a heat dissipation fan 4 mounted on the base 21 for forcing air to flow so as to dissipate heat of the heat generating components 3 in an air-cooled manner. The heat radiation fan 4 may be an axial flow fan.

In some embodiments, referring specifically to fig. 5, a heat dissipation hole 24 is formed on the base 21, and the heat dissipation fan 4 is disposed corresponding to the heat dissipation hole 24, so that heat in the electrical box 2 can be dissipated through the heat dissipation hole 24.

In addition, the heat dissipation holes 24 may be formed of a grid hole, or the heat dissipation holes 24 may include a plurality of micro holes, thereby blocking contaminants outside the electrical box 2 from entering the box through the heat dissipation holes 24 while ensuring ventilation and heat dissipation.

In the present example, the heat dissipation hole 24 is provided on one side wall of the base 21, on which the heat dissipation fan 4 is fixedly mounted.

In some embodiments, the electrical box 2 further includes a refrigerant heat dissipation component 5, which is connected in a refrigerant circulation loop of the air conditioner, and uses a refrigerant of the air conditioning system to cool down to achieve the purpose of heat dissipation.

The side wall of the electrical box 2 is provided with an installation opening 25, and the refrigerant heat dissipation assembly 5 is installed on the base 21 corresponding to the installation opening 25. The refrigerant heat dissipation component 5 and the heat dissipation fan 4 are respectively positioned on two opposite sides of the base 21. Referring to fig. 7, the refrigerant heat dissipation assembly 5 is provided with an air flow channel 53, and the air flow channel 53 is communicated with the inside and the outside of the electrical box 2.

Referring to fig. 4, arrows in the drawing indicate airflow paths, under the forced action of the heat dissipation fan 4, airflow in the compressor cavity enters the electrical box 2 through the refrigerant heat dissipation component 5, then flows through the area where the heating element 3 is located, takes away heat generated by the heating element 3, and is blown out through the heat dissipation holes 24.

Because the refrigerant with lower temperature flows in the refrigerant heat dissipation assembly 5, the temperature of the refrigerant heat dissipation assembly 5 is lower than the temperature of the air flow, when the air flow passes through the refrigerant heat dissipation assembly 5, the air flow is cooled, and the air flow with lower temperature can more bring away the heat generated by the heating element 3 when passing through the heating element 3, so that the temperature of the heating element 3 is maintained within the working temperature range, and the shutdown caused by overhigh temperature in the electric box 2 is avoided.

Compared with the problem that the fan of utilizing the off-premises station forced air cooling or simply rely on the refrigerant to dispel the heat and cause poor radiating effect among the prior art, this application is through setting up radiator fan 4 and refrigerant radiator unit 5 in electric apparatus box 2, combines together initiative forced air cooling and refrigerant heat dissipation, and refrigerant radiator unit 5 reduces air current temperature, and radiator fan 4 makes low temperature air current pass through heating element 3 to take away the heat, have better radiating effect.

In addition, in prior art, the refrigerant radiator always contacts the heating element 3 to dissipate heat, when the layout of the heating element 3 is more dispersed, the refrigerant radiator is larger and occupies more space, but the refrigerant radiating component 5 in the application does not need to contact with the heating element 3, and the low-temperature air flow passing through the refrigerant radiating component 5 can be blown to the heating element 3 by utilizing the fan, so that the size of the refrigerant radiating component 5 does not need to consider the layout of the heating element 3, and the refrigerant radiating component 5 is smaller and has the advantages of small volume and compact structure.

The temperature of the compressor chamber of the outdoor unit is typically 50-55 ℃, after the air flow in the compressor chamber passes through the refrigerant heat dissipation assembly 5, the air flow temperature is reduced to 40-45 ℃, and then the air flow continues to pass through the heating component 3, so that the heat generated by the heating component 3 is taken away, the temperature of the heating component 3 is maintained in the range of 40-50 ℃, and the normal operation of the component is ensured.

According to the embodiment of the application, referring specifically to fig. 4, the electrical box 2 may further include an air outlet duct 26, where the air outlet duct 26 is installed on the outer side of the base 21 corresponding to the heat dissipation hole 24, that is, one end of the air outlet duct 26 is communicated with the accommodating space 23 through the heat dissipation hole 24, and the other end is communicated with the atmosphere. The air in the electrical box 2 can be emitted to the atmosphere along the air outlet duct 26.

The arrangement of the air outlet duct 26 defines an air outlet path for the cooling air flow so that the cooling air flow can be blown out of the air conditioner along a prescribed path. In the present example, the air outlet duct 26 is curved with its free end facing downward, but in other embodiments, the shape and orientation of the air outlet duct 26 may be set according to actual conditions.

In some embodiments, the cooling fan 4 and the cooling medium cooling component 5 are located on two sides of the electrical box 2 in the length direction. Thus, compared with the arrangement in the width direction, the flow path in the length direction has faster air speed when the air quantity is fixed, and can rapidly take away the heat in the electrical box 2.

In some embodiments, referring to fig. 7, the refrigerant heat dissipating assembly 5 includes a fin plate 51 and a heat dissipating tube 52.

The fin plate 51 has a plurality of fins arranged at intervals, the intervals between the fins forming air flow passages 53, and air flow of the press chamber enters the electrical box 2 through the air flow passages 53.

The radiating pipe 52 is connected in a refrigerant circulation loop of the air conditioner, and refrigerant flows in the radiating pipe; the radiating pipe 52 is penetrated through the fin plate 51 such that a low temperature of the radiating pipe 52 is transferred to the fin plate 51.

The air flow in the press chamber is cooled by contact with the low temperature fin plate 51 while passing through the air flow passage 53.

According to the embodiment of the present application, the fin plate 51 has a substantially rectangular parallelepiped plate shape including the fin portion 511 and the connection portion 512. Wherein the fin portion 511 includes a plurality of parallel fins. The connection portion 512 is connected to the outer circumference of the fin portion 511, and the connection portion 512 is connected to the base 21 by a form such as a screw, thereby achieving the mounting of the refrigerant heat dissipating assembly 5 on the base 21.

In some embodiments, the radiating pipe 52 includes a main inlet pipe 521, a cross-over pipe 522, and a main return pipe 523. Wherein the main liquid inlet pipe 521 and the main liquid return pipe 523 are respectively connected to two ends of the cross-connected pipe 522 for connecting with a refrigerant circulation loop; the penetration pipe 522 penetrates the fin plate 51.

The penetrating pipes 522 are respectively penetrated into the fin plate 51 in a plurality of stages, so that the contact surface plates of the radiating pipes 52 and the fin plate 51 can be increased, and the heat conduction from the radiating pipes 52 to the fin plate 51 can be accelerated.

According to an embodiment of the present application, the penetration pipe 522 includes a sub-inlet pipe 524, a connection pipe 525, and a sub-return pipe 526. The number of the branch liquid inlet pipes 524 is N, and the branch liquid inlet pipes are all connected with the main liquid inlet pipe 521; the number of the liquid return dividing pipes 526 is N, and the liquid return dividing pipes 526 are all connected with the main liquid return pipe 523; the number of the connecting pipes 525 is N, and each of the sub-liquid inlet pipes 524 and each of the sub-liquid return pipes 526 are connected through one connecting pipe 525.

The refrigerant flows in from the main liquid inlet pipe 521, is divided into N paths and flows into the sub liquid inlet pipes 524 respectively, then each path flows into the sub liquid return pipe 526 through the connecting pipe 525, and finally flows out in the main liquid return pipe 523 in a mixing way.

The flow of the multiple paths of refrigerants in the cross-connected pipe 522 can further accelerate the heat conduction from the radiating pipe 52 to the fin plate 51, so that the refrigerant radiating component 5 is rapidly cooled.

In the refrigerant cooling assembly 5, the multi-piece structure of the fin plate 51 and the multi-way flow dividing structure of the cooling tube 52 enable the contact area between the air flow and the refrigerant cooling assembly 5 to be larger when the air flow passes through the refrigerant cooling assembly 5, so that the temperature of the air flow is effectively reduced, and the cooling effect in the electric box 2 is improved, and the cooling efficiency is improved.

According to the embodiment of the application, the main liquid inlet pipe 521 and the main liquid return pipe 523 are located on the same side of the fin plate 51, so that the connection position of the heat dissipating pipe 52 in the refrigerant circulation loop can be concentrated, and the connection structure of the pipeline is compact.

In addition, the radiating pipe 52 can be arranged outside the electrical box 2, so that the space occupied by the refrigerant radiating component 5 in the electrical box 2 can be reduced.

Along with the diversification of the functions of the air conditioner, the electric control system in the air conditioner is more and more complex, so that the types of components in the electric box 2 are more and more, and the heating conditions of different electric components are different. However, the air flow is relatively uniform and dispersed while passing through the accommodating space 23, which results in high temperature in the area where heat is generated and low temperature in the area where heat is not generated. Therefore, in order to ensure uniform heat dissipation in the electrical box 2, in some embodiments of the present application, different air volumes are allocated for different components to cool, that is, components with more heat generate are allocated with more air volumes, and components with less heat generate are allocated with relatively less air volumes.

Referring to fig. 8 and 9, an air guiding cavity 27 is arranged in the electrical box 2, and the air guiding cavity 27 is communicated with the refrigerant heat dissipation assembly 5, so that air flow passing through the refrigerant heat dissipation assembly 5 can enter the air guiding cavity 27.

The air guide cavity 27 is provided with a vent 271 facing the heating element 3, and air flow in the air guide cavity 27 can be directly blown to the heating element 3 through the vent 271, so that accurate cooling is realized.

The position layout of the ventilation opening 271 is set according to the positions of different components in the electrical box 2, so that more air quantity can be given to the components with larger heat generation, and the rest parts distribute relatively less air quantity, thereby ensuring uniform heat dissipation in the electrical box 2.

In some embodiments, the air guiding rib 272 extending towards the heating element 3 is arranged on the air guiding cavity 27, the air guiding channel 273 is formed on the air guiding rib 272, and the air opening 271 is positioned at the end part of the air guiding rib 272, so that air can be intensively supplied to the heating element 3 through the air guiding rib 272, and air quantity distribution is realized.

The wind-guiding rib 272 is inclined, and the wind-guiding rib 272 inclines from top to bottom to the direction of the heat radiation fan 4, namely, the wind-guiding rib 272 inclines to the direction along the airflow, so that the airflow in the wind-guiding cavity 27 flows into the wind-guiding channel 273 along an obtuse angle, and the wind resistance is reduced.

Alternatively, the ventilation opening 271 may be an opening directly formed in the wall of the air guiding chamber 27.

In some embodiments, the air guide chamber 27 may be formed inside the box cover 22.

Lid 22 includes an outer wall 221 and an inner wall 222; the space enclosed between the outer wall 221 and the inner wall 222 forms the air guiding chamber 27. The inner wall 222 has a blocking wall 223 extending downward near one end of the refrigerant heat dissipating component 5, and the blocking wall 223 separates the heat generating component 3 from the refrigerant heat dissipating component 5, so that the air flow passing through the refrigerant heat dissipating component 5 enters the air guiding cavity 27.

Referring to fig. 8 specifically, the arrows in the drawing illustrate the airflow path, after the airflow outside the electrical box 2 is cooled at the refrigerant heat dissipation component 5, the airflow enters the air guiding cavity 27, blows to the heating component 3 along the air guiding rib 272 or the opening, takes away the heat at the heating component 3, and finally is discharged out of the electrical box 2 through the air outlet duct 26.

The temperature in the cavity of the press can change along with the different environment temperatures of the outdoor unit and the different working strengths of the outdoor unit, and the electric box 2 generates different temperature ranges due to the different heating of the heating components 3; if the heat dissipation fan 4 is only at a single rotation speed, electric energy is wasted due to the fact that the rotation speed of the fan is high when the temperature in the electric box 2 is low, and heat dissipation is poor due to the fact that the rotation speed of the fan is low when the temperature in the electric box 2 is high. In view of this situation, in some embodiments of the present application, the temperature condition in the electrical box 2 is monitored in real time by setting a temperature sensor near the heating element 3 in the electrical box 2, and the rotation speed of the heat dissipation fan 4 is controlled according to the monitored temperature condition, so that more reasonable heat dissipation is performed on the electrical box 2.

Specifically, a temperature sensor is provided in the electrical box 2, and the temperature sensor is provided near the heating element 3 for monitoring the temperature in the electrical box 2.

The controller controls the cooling fan 4 to work in the corresponding gear according to the temperature T detected by the temperature sensor.

For example, when T.ltoreq.T0, the radiator fan 4 is in the O range. The temperature condition shows that the temperature in the electric box 2 is relatively low, air cooling and heat dissipation are not needed, and the heat dissipation fan 4 does not need to work.

When T0 is more than or equal to T1, the heat radiation fan 4 is in a low-speed gear; when T1 is more than or equal to T2, the heat radiation fan 4 is in a medium speed gear; when T2 is more than or equal to T3, the heat radiation fan 4 is in a high-speed gear; when T3 is more than or equal to T4, the heat radiation fan 4 is in an ultra-high speed gear.

The temperature in the electrical apparatus box 2 is detected through the temperature sensor, so that the cooling fan 4 works in a corresponding gear, the fan rotating speed can be adjusted along with the temperature in the electrical apparatus box 2, the problems of poor heat dissipation and electric energy waste when the temperature is high and the temperature is low under the fixed rotating speed are avoided, and the cooling fan has the advantages of reasonable heat dissipation and energy conservation.

Referring to fig. 10, a refrigerant circulation circuit of an air conditioner includes a refrigerant circulation circuit in which a compressor, a four-way valve, an outdoor heat exchanger, a throttling element, an indoor unit, and a gas-liquid separator are connected by refrigerant pipes.

In the present application, the refrigerant heat dissipating unit 5 is mainly connected to the outdoor unit side of the refrigerant circulation circuit, and therefore, an indoor heat exchanger, an indoor throttling element, and the like on the indoor unit side of the refrigerant circulation circuit are not further described in the drawings.

In the refrigerant circulation loop, the output end of the compressor is connected with a first interface of a four-way valve, a second interface of the four-way valve is connected with an outdoor heat exchanger, the outdoor heat exchanger is connected with an outdoor side throttling element in series and then is connected with an indoor unit, the indoor unit is connected with a fourth interface of the four-way valve, and a third interface of the four-way valve is connected with the input end of a gas-liquid separator, and the gas-liquid separatorIs connected to the input of the compressor. The outdoor throttle element may be an outdoor electronic expansion valve EV _o 。

In some embodiments of the present application, in a refrigerant circulation loop of an air conditioner, an input end of a refrigerant heat dissipation assembly is connected between an outdoor heat exchanger and an indoor heat exchanger, and an output end of the refrigerant heat dissipation assembly is connected with an input end of a gas-liquid separator. Stated another way, the refrigerant heat dissipating assembly is in parallel with the evaporator in the refrigerant circulation loop. The high-pressure medium-temperature refrigerant flows through the radiating pipes of the refrigerant radiating component, so that the temperature of the refrigerant radiating component can be reduced.

In the actual use of the outdoor unit, due to the different working environments and the influence of extremely severe environments, in some extreme environments, even if the rotation speed of the cooling fan 4 is the maximum, the cooling fan still cannot effectively dissipate heat inside the electrical box 2, so in some embodiments of the application, in the refrigerant circulation loop, the upstream series flow throttling element of the refrigerant cooling assembly can enable the refrigerant state in the refrigerant cooling assembly to be changed from high-pressure medium temperature to low-pressure low temperature, and the refrigerant cooling assembly can further reduce the air flow temperature entering the electrical box 2.

In this embodiment, since the throttling element is connected in series to the upstream of the refrigerant heat dissipation assembly, the temperature of the refrigerant flowing through the refrigerant heat dissipation assembly is reduced, so that the temperature of the refrigerant heat dissipation assembly is reduced, and when the air flow passes through the refrigerant heat dissipation assembly, the temperature of the air flow can be reduced to 10-15 ℃, and the low-temperature air flow passes through the heating element, so that the heat dissipation effect in the electrical box 2 is better, and the heat dissipation speed is faster.

Specifically, the throttling element may be an electronic expansion valve EVB. The electronic expansion valve EVB is connected in series at the input end side of the refrigerant heat dissipation component. The refrigerant flows to the refrigerant heat dissipation component after being throttled by the electronic expansion valve EVB.

An outdoor electronic expansion valve EV is connected in series between the outdoor heat exchanger and the liquid pipe stop valve _o The input end of the refrigerant heat radiation component is connected between the outdoor electronic expansion valve and the liquid pipe stop valve.

In some embodiments, the electronic expansion valve EVB opening may be adjusted based on the temperature detected by the temperature sensor.

When T is smaller than T1, the temperature in the electric box 2 is lower, the temperature in the electric box 2 can be reduced only by controlling the heat radiation fan 4, the electronic expansion valve EVB is in a closed state, and the refrigerant heat radiation component 5 does not participate in heat radiation in the state.

When t=t1, the electronic expansion valve EVB opening reaches the opening a state;

when the temperature T1 is less than T2, the opening of the electronic expansion valve EVB is calculated according to an opening formula:

opening 1= (opening b-opening a)/(T2-T1)/(T-T1);

when the temperature t=t2, the opening degree of the electronic expansion valve EVB reaches the opening degree b state;

when the temperature T2 is less than T3, the opening of the electronic expansion valve EVB is calculated according to an opening formula:

opening 2= (opening c-opening b)/(T3-T2)/(T-T2);

when the temperature T is more than or equal to T3, the opening degree of the electronic expansion valve EVB reaches the opening degree c state;

wherein T1, T2, T3, a, b, c are preset values; and T1 < T2 < T3, a < b < c.

In addition, the opening degree of the electronic expansion valve EVB may be controlled in combination with the rotation speed of the heat radiation fan 4.

According to the first utility model, as the heat dissipation fan 4 and the refrigerant heat dissipation assembly 5 are respectively arranged on the two sides of the heating element 3 in the electrical box 2, under the action of the heat dissipation fan 4, when air flows through the refrigerant heat dissipation assembly 5, the air flows are cooled, and the lower-temperature air flows can more bring away the heat generated by the heating element 3 when passing through the heating element 3, so that the temperature of the heating element 3 is maintained in a working temperature range, and the shutdown caused by overhigh temperature in the electrical box 2 is avoided.

Compared with the problem of poor heat dissipation effect caused by air cooling of a fan of an outdoor unit or simply by means of refrigerant heat dissipation in the prior art, the second utility model concept combines active air cooling and refrigerant heat dissipation by arranging the heat dissipation fan 4 and the refrigerant heat dissipation assembly 5 in the electric box 2, the refrigerant heat dissipation assembly 5 reduces the air flow temperature, and the heat dissipation fan 4 enables low-temperature air flow to pass through the heating element 3, so that heat is taken away, and the electric box has better heat dissipation effect.

In the third inventive concept of the present application, in the prior art, the coolant radiator always contacts the heating element 3 to radiate heat, when the layout of the heating element 3 is dispersed, the coolant radiator is larger, and occupies more space, but the coolant radiating component 5 in the present application does not need to contact with the heating element 3, and the low-temperature air flow passing through the coolant radiating component 5 can be blown to the heating element 3 by using the fan, so that the size of the coolant radiating component 5 does not need to consider the heating element 3, and the coolant radiating component 5 can be relatively smaller, and has the advantages of small volume and compact structure.

According to the fourth utility model conception, the air guide cavity 27 is arranged in the electric appliance box 2, and the ventilation opening 271 facing the heating element 3 is arranged on the air guide cavity 27 according to the layout of the heating element 3, so that more air quantity is distributed to a place with more heat, and the uniform heat dissipation in the whole electric appliance box is ensured.

According to the fifth utility model, the throttling element is connected in series with the upstream of the refrigerant heat dissipation assembly 5 on the refrigerant circulation loop, so that the temperature of the refrigerant at the refrigerant heat dissipation assembly 5 is reduced, and then the lower-temperature air flow passes through the heating element 3, so that the heating element 3 is better cooled, and the heat dissipation efficiency is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. An air conditioner, comprising:

the electric appliance box is provided with a heat dissipation hole, and a heating element is arranged in the electric appliance box;

the refrigerant heat dissipation assembly is arranged on the electrical box and is provided with a through air flow channel for cooling air flowing through the air flow channel;

the heat radiation fan is arranged on the electrical box corresponding to the heat radiation hole;

the heating element is positioned between the refrigerant heat dissipation assembly and the heat dissipation fan;

under the action of the heat radiation fan, after the air flow is cooled at the refrigerant heat radiation assembly, the air flow flows through the heat generating component and takes away the heat of the heat generating component, and the heat is blown out from the heat radiation hole.

2. The air conditioner of claim 1, wherein the electrical box further comprises:

the air outlet duct is connected to the outer side of the electrical box corresponding to the heat dissipation hole and is used for guiding airflow to flow;

and the air flow from the radiating holes flows out along the air outlet air duct.

3. The air conditioner of claim 1, wherein the heat dissipation fan and the refrigerant heat dissipation assembly are located at both sides of the electrical box in a length direction.

4. The air conditioner as set forth in claim 1, wherein said refrigerant heat dissipating assembly includes:

a fin plate having a plurality of fins, the spaces between the fins forming the air flow channels;

the radiating pipes are divided into a plurality of sections and respectively penetrate through the fin plates.

5. The air conditioner of claim 4, wherein the radiating pipe comprises:

a main liquid inlet pipe and a main liquid return pipe;

the N liquid inlet separating pipes are connected with the main liquid inlet pipe and penetrate through the fin plate at intervals;

the N liquid return separating pipes are connected with the main liquid return pipe and penetrate through the fin plates at intervals;

wherein N is an integer not less than 2.

6. The air conditioner of claim 5, wherein the main intake pipe and the main return pipe are located on the same side of the fin plate.

7. The air conditioner of claim 4, wherein the refrigerant heat dissipating assembly is connected to a side wall of the electrical box, and the heat dissipating pipe is located at an outer side of the electrical box.

8. The air conditioner according to claim 1, wherein an outdoor heat exchanger, an indoor unit and a gas-liquid separator are provided on a refrigerant circulation circuit of the air conditioner;

the liquid inlet end of the refrigerant heat dissipation assembly is connected between the outdoor heat exchanger and the indoor unit, and the liquid return end of the refrigerant heat dissipation assembly is connected to the input end of the gas-liquid separator.

9. The air conditioner of claim 1, further comprising:

the temperature sensor is arranged in the electrical box and used for detecting the temperature in the electrical box; and

and the controller is used for controlling the rotating speed of the cooling fan according to the temperature detected by the temperature sensor.

10. The air conditioner of claim 1, wherein the heat dissipation fan is an axial flow fan.