CN219976616U

CN219976616U - Air conditioner

Info

Publication number: CN219976616U
Application number: CN202321046845.5U
Authority: CN
Inventors: 于小杰; 陈见兴
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2023-11-07
Anticipated expiration: 2033-05-04

Abstract

The utility model discloses an air conditioner, relates to the technical field of air conditioning, and aims to solve the problem that a frequency converter has larger heating value. The air conditioner comprises a compressor, a frequency converter and a frequency conversion heat dissipation assembly. The frequency converter is electrically connected with the compressor and controls the rotating speed of the compressor. The variable-frequency heat dissipation assembly comprises a water tank, a variable-frequency heat exchanger and a heat dissipation circulating pump, wherein the water tank, the variable-frequency heat exchanger and the heat dissipation circulating pump are arranged in the variable-frequency heat exchange tank. The water-cooling heat exchanger of the frequency conversion heat dissipation assembly is in contact installation with the frequency converter and is provided with a water-cooling heat exchange channel. The water tank is used for containing cooling liquid, and one end of the water-cooling heat exchange channel is communicated with the water tank. The variable-frequency heat exchanger is provided with a variable-frequency first heat exchange channel, one end of the variable-frequency first heat exchange channel is communicated with the water tank, and the other end of the variable-frequency first heat exchange channel is communicated with the other end of the water-cooling heat exchange channel. The heat dissipation circulating pump is used for driving the cooling liquid to circularly flow among the water cooling heat exchange channel, the water tank and the variable-frequency first heat exchange channel. The air conditioner provided by the utility model can radiate heat of the frequency converter.

Description

Air conditioner

Technical Field

The utility model belongs to the technical field of air conditioning, and particularly relates to an air conditioner.

Background

An air conditioner is a device which can regulate and control parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure. The compressor is a core device of the air conditioner, so that the air conditioner has a high energy efficiency ratio when adjusting the ambient air.

At present, the air conditioner generally adopts a variable frequency compressor, and the variable frequency compressor can be controlled and regulated to rotate through the variable frequency compressor, so that the compressor can be operated in an optimal rotating speed state according to different user working conditions, and the energy efficiency ratio of the air conditioner is further improved. Therefore, when the working condition load of a user is large, the frequency converter needs to output large power to control the variable-frequency compressor of the variable-frequency type to run at a high speed, and the frequency converter can have large heating value.

Disclosure of Invention

The utility model provides an air conditioner, which aims to solve the problem that a frequency converter has larger heating value.

The embodiment of the utility model provides an air conditioner which comprises a compressor, a frequency converter and a frequency conversion radiating component. The frequency converter is electrically connected with the compressor and controls the rotating speed of the compressor. The variable-frequency heat dissipation assembly comprises a water tank, a variable-frequency heat exchanger and a heat dissipation circulating pump, wherein the water tank, the variable-frequency heat exchanger and the heat dissipation circulating pump are arranged in the variable-frequency heat exchange tank. The water-cooling heat exchanger of the frequency conversion heat dissipation assembly is in contact installation with the frequency converter and is provided with a water-cooling heat exchange channel. The water tank is used for containing cooling liquid, and one end of the water-cooling heat exchange channel is communicated with the water tank. The variable-frequency heat exchanger is provided with a variable-frequency first heat exchange channel, one end of the variable-frequency first heat exchange channel is communicated with the water tank, and the other end of the variable-frequency first heat exchange channel is communicated with the other end of the water-cooling heat exchange channel. The heat dissipation circulating pump is used for driving the cooling liquid to circularly flow among the water cooling heat exchange channel, the water tank and the variable-frequency first heat exchange channel.

Because the water-cooling heat exchanger contacts the frequency converter, and the water-cooling heat exchange channel is formed in the water-cooling heat exchanger, one end of the water-cooling heat exchanger is communicated with the water tank, and the other end of the water-cooling heat exchanger is communicated with one end of the frequency converter. And the variable frequency heat exchanger can be communicated with the water tank through a heat dissipation circulating pump. Based on the above, the cooling liquid in the water tank can circularly flow in the water tank, the heat dissipation circulating pump, the variable frequency heat exchanger, the water cooling heat exchanger and the water tank under the drive of the heat dissipation circulating pump. Therefore, the heat generated during the operation of the frequency converter can be quickly absorbed by the cooling liquid flowing through the water-cooled heat exchanger, and the heat can be quickly emitted along with the cooling liquid when flowing through the frequency-converted heat exchanger, so that the continuous and stable cooling effect of the frequency converter is realized, and the frequency converter can control the compressor to continuously and stably operate.

Based on this, when arranging the frequency conversion heat dissipation subassembly, can be directly with installing the frequency conversion heat exchange box of water tank, heat dissipation circulating pump and frequency conversion heat exchanger and be close to the off-premises station of air conditioner and arrange, perhaps directly install in the off-premises station, after later contacting the installation with the converter with the water-cooling heat exchanger, can pass the frequency conversion heat exchange box through the pipeline to make water-cooling heat exchange channel's one end and water tank intercommunication, and make water-cooling heat exchange channel's the other end and the export side intercommunication of frequency conversion first heat exchange channel. In the process, components such as a water tank, a heat dissipation circulating pump, a variable frequency heat exchanger and the like are not required to be additionally installed and arranged, and the installation process is convenient and quick.

In some embodiments, an air conditioner includes a condensing heat exchanger, a first restrictor, and an evaporating heat exchanger. One end of the first throttle is connected with one end of the condensing heat exchanger, and the other end of the first throttle is connected with one end of the evaporating heat exchanger. The compressor has an inlet end and an outlet end, the inlet end of the compressor is connected with the other end of the evaporation heat exchanger, and the outlet end of the compressor is connected with the other end of the condensation heat exchanger, so that the refrigerant circularly flows among the compressor, the condensation heat exchanger, the first throttle and the evaporation heat exchanger. The variable-frequency heat exchanger is a liquid-liquid type heat exchanger and is also provided with a variable-frequency second heat exchange channel, and the variable-frequency second heat exchange channel is used for absorbing heat of the variable-frequency first heat exchange channel. The variable-frequency heat dissipation assembly further comprises a second restrictor, one end of the variable-frequency second heat exchange channel is communicated with the first restrictor through the second restrictor, and the other end of the variable-frequency second heat exchange channel is communicated with the air inlet end of the compressor.

In some embodiments, the variable frequency heat sink assembly includes a temperature sensor mounted between the water-cooled heat exchanger and the variable frequency heat exchanger along a flow direction of the cooling fluid for detecting a temperature of the cooling fluid flowing from the variable frequency heat exchanger to the water-cooled heat exchanger and outputting a temperature acquisition signal. The air conditioner further comprises a controller, the second restrictor is an electronic expansion valve and is used for controlling the flow of the refrigerant in the variable-frequency second heat exchange channel; the controller is electrically connected with the temperature sensor and the second throttle, and the controller is used for receiving the temperature acquisition signal. When the temperature acquisition signal is greater than or equal to a first preset temperature threshold value, the controller controls the second restrictor to increase the opening. And when the temperature acquisition signal is smaller than a second preset temperature threshold value, the controller controls the second restrictor to reduce the opening. The first preset temperature threshold is greater than the second preset temperature threshold.

In some embodiments, the controller is further electrically connected to the frequency converter and the heat-dissipating circulation pump, and controls the frequency converter and the heat-dissipating circulation pump to be turned on synchronously.

In some embodiments, the tank has a liquid inlet aperture, a liquid outlet aperture, and a strip aperture. Along the flow direction of cooling liquid, the one end that water-cooling heat transfer passageway is close to the water tank communicates with the feed liquor hole, and goes out the liquid hole and passes through the heat dissipation circulating pump and communicates with the one end that frequency conversion first heat transfer passageway is close to the water tank. The water tank includes the second printing opacity board, and the bar hole extends along vertical direction, and the edge connection in second printing opacity board and bar hole seals the bar hole.

In some embodiments, the variable frequency heat sink assembly further comprises a flow switch and a fluid replacement valve, and the heat-dissipating circulation pump is in communication with the variable frequency first heat exchange channel through the flow switch. The flow switch is used for detecting the flow of the cooling liquid flowing through the heat dissipation circulating pump and outputting a flow acquisition signal. The water tank is also provided with a fluid supplementing hole, one end of the fluid supplementing valve is communicated with the fluid supplementing hole, the other end of the fluid supplementing valve is used for being connected with a water supply pipe, and the fluid supplementing valve is in a normally closed state. Under the condition that the variable-frequency heat dissipation assembly further comprises a controller, the fluid infusion valve is an electric control valve, the controller is electrically connected with the fluid infusion valve and the flow switch, and the controller is used for receiving flow acquisition signals. When the flow acquisition signal is smaller than or equal to a preset flow threshold, the controller controls the liquid supplementing valve to be opened.

In some embodiments, the water tank further comprises a tank body and a tank top cover. The box main body encloses into the solution chamber that has one side open-ended, and is equipped with feed liquor hole, play liquid hole and bar hole on the box main body, and the solution chamber is used for splendid attire coolant liquid. The tank top cover is arranged close to the opening of the solution cavity and is connected with the edge of the tank body close to the opening.

In some embodiments, the water tank further includes a drain valve, the tank body is provided with a drain hole, the drain hole is disposed near a lower end of the tank body in a vertical direction and communicated with the solution chamber, and one end of the drain valve is communicated with the drain hole.

In some embodiments, the top cover of the tank is provided with an exhaust hole, and the exhaust hole is used for communicating with the solution cavity and balancing the air pressure inside and outside the solution cavity.

In some embodiments, the evaporative heat exchanger is a liquid-to-liquid heat exchanger, the evaporative heat exchanger including a first evaporative heat exchange channel and a second evaporative heat exchange channel. The air conditioner further comprises a plurality of indoor heat exchangers, a plurality of indoor temperature control valves and at least one indoor circulating pump. The plurality of indoor temperature control valves are arranged in one-to-one correspondence with the plurality of indoor heat exchangers, one indoor temperature control valve is communicated with one indoor heat exchanger to form one refrigeration branch, and the plurality of refrigeration branches are communicated in parallel. The same end of the plurality of refrigeration branches is communicated with one end of the second evaporation heat exchange channel, and the other ends of the plurality of refrigeration branches are communicated with the other end of the second evaporation heat exchange channel through an indoor circulating pump. Along the flow direction of refrigerant, the one end that indoor condensation heat exchanger was kept away from to first throttle is through first evaporation heat transfer passageway and compressor's inlet end intercommunication, and first evaporation heat transfer passageway is used for absorbing the heat of second evaporation heat transfer passageway.

In some embodiments, the air conditioner further includes an oil separator installed between the outlet end of the compressor and the condensing heat exchanger for filtering and separating the lubricant oil flowing out from the compressor.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a connection structure of an air conditioner according to an embodiment of the present application;

FIG. 2 is a schematic view of the connection of the evaporative heat exchanger shown in FIG. 1 to a secondary circulation heat exchange limb;

FIG. 3 is a schematic view of a configuration of the compressor of FIG. 1 with an outlet connected to an oil separator;

FIG. 4 is a schematic view of a connection structure of the air conditioner shown in FIG. 3 including a plurality of compressors;

fig. 5 is a schematic circuit connection diagram of an air conditioner according to an embodiment of the present application;

fig. 6 is a frequency conversion heat dissipation assembly for heat dissipation of a frequency converter according to an embodiment of the present application;

FIG. 7 is an exploded view of the water cooled heat exchanger shown in FIG. 6 mounted in contact with a frequency converter;

fig. 8 is a schematic diagram of a connection structure of a variable frequency heat dissipation assembly according to an embodiment of the present application for dissipating heat through refrigerant circulation of a compressor;

FIG. 9 is a schematic view of a connection structure of the variable frequency heat sink assembly shown in FIG. 8 further including a temperature sensor and a water flow switch;

FIG. 10 is a front view of a variable frequency heat dissipating assembly according to an embodiment of the present application further comprising a variable frequency heat exchanging box;

FIG. 11 is a front view of a water tank of the type shown in FIG. 10;

fig. 12 is a right side view of the water tank shown in fig. 11;

fig. 13 is a rear view of the water tank shown in fig. 11.

Reference numerals:

100-an air conditioner;

10-a compressor; 11-an air inlet end; 12-an exhaust end; 13-a liquid inlet end;

20-condensing heat exchanger; 21-condensing inlet; 22-a condensate outlet; 23-condensing liquid return port;

30-a first throttle;

40-an evaporative heat exchanger; 41-a first evaporative heat exchange channel; 411-evaporation inlet; 412-an evaporation vent; 42-a second evaporative heat exchange channel;

51-an indoor heat exchanger; 52-an indoor temperature control valve; 53-an indoor circulation pump;

50-oil separator;

60-a condensation circulating pump;

70-frequency converter;

80-a controller;

90-a variable frequency heat dissipation assembly;

91-a water tank; 911-case body; 913-a bin top cover; 912-solution chamber; 9141-an exhaust hole; 9142-liquid inlet; 9143-a liquid outlet hole; 9144-drain hole; 9145-a bar-shaped hole; 9146-fluid infusion well; 915-a second light-transmitting panel; 916-drain valve; 917-a make-up valve;

92-a water-cooled heat exchanger; 921-heat dissipation plates; 922-water cooling radiating pipes; 93-a heat dissipation circulating pump; 94-a variable frequency heat exchanger; 941-a variable-frequency first heat exchange channel; 942-frequency conversion second heat exchange channel; 95-a second restrictor; 96-temperature sensor; 97-flow switch.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or relative positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Unless otherwise specified, the above description of the azimuth may be flexibly set in the course of practical application in the case where the relative positional relationship shown in the drawings is satisfied.

The terms "first," "second," and the like, 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" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly stated 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 directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. Wherein "connected" has the meaning of connected and conducting. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In embodiments of the present utility model, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, article or apparatus that comprises the element.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment of the present utility model is not to be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The embodiment of the utility model provides an air conditioner, namely an air conditioner, which is equipment capable of adjusting and controlling parameters such as temperature, humidity, circulation flow rate and the like of ambient air in a building or a structure.

As shown in fig. 1, fig. 1 is a schematic diagram of a connection structure of an air conditioner 100 according to an embodiment of the present utility model. The air conditioner 100 may include a compressor 10, a condensing heat exchanger 20, a first throttle 30, and an evaporating heat exchanger 40. Wherein the compressor 10 may have an inlet end and an outlet end. The air inlet end of the compressor 10 may be connected to one end of the condensing heat exchanger 20, the other end of the condensing heat exchanger 20 may be connected to one end of the first restrictor 30, the other end of the first restrictor 30 may be connected to one end of the evaporating heat exchanger 40, and the other end of the evaporating heat exchanger 40 may be connected to the air outlet end of the compressor 10. So that the refrigerant may circulate among the compressor 10, the condensing heat exchanger 20, the first restrictor 30, the evaporating heat exchanger 40, and the compressor 10.

Based on this, the refrigerant can circulate between the condensing heat exchanger 20 and the evaporating heat exchanger 40, and a reversible phase change is generated, and the refrigerant can release or absorb heat while generating a phase change, so that heat can circulate between the condensing heat exchanger 20 and the evaporating heat exchanger 40. Referring to fig. 1, a high-pressure gaseous refrigerant compressed by a compressor 10 may flow to a condensing heat exchanger 20 so that the refrigerant may liquefy and release heat at the condensing heat exchanger 20 to heat other media near the condensing heat exchanger 20. Then, the pressure of the liquid refrigerant flowing into the evaporation heat exchanger 40 is reduced by the first throttle 30, so that the refrigerant can absorb heat and evaporate at the evaporation heat exchanger 40, thereby cooling the medium near the evaporation heat exchanger 40 and achieving heat exchange transfer between the condensation heat exchanger 20 and the evaporation heat exchanger 40.

The air conditioner 100 may be installed as a cooling or dehumidifying device application. At this time, the condensing heat exchanger 20 may be used as an outdoor heat exchanger, such as a gas-liquid heat exchanger, and may be used to make the flowing gaseous refrigerant emit heat and be fully liquefied by air, spraying a cooling liquid, or may be used to quickly absorb heat of the refrigerant by a liquid-liquid heat exchanger such as a plate heat exchanger or a shell heat exchanger. The liquid refrigerant may then flow through the first throttle 30 to the evaporation heat exchanger 40, and the evaporation heat exchanger 40 may be a heat exchanger for cooling the user side air. For example, the evaporative heat exchanger 40 may be mounted within a user-side compartment to directly cool the air within the user-side compartment. In addition, the evaporation heat exchanger 40 may be disposed away from the user side, and in this case, the heat of the evaporation heat exchanger 40 may be brought to the vicinity of the user side through the secondary circulation heat exchange branch, for cooling the air in the vicinity of the user side. Alternatively, the air conditioner 100 may be applied as a high-power heat pump device. In this case, the condensing heat exchanger 20 may be an indoor heat exchanger for heating the user-side air, or may be a heat exchanger for heating another medium. For example, the condensing heat exchanger 20 may be installed in a room at the user side to heat air in the room at the user side. In addition, the condensing heat exchanger 20 may be disposed away from the user side, and in this case, the heat of the condensing heat exchanger 20 may be brought to the vicinity of the user side through the secondary circulation heat exchange branch, so as to heat air or other medium (such as hot water) in the vicinity of the user side. In this way, the refrigerant may liquefy and release heat in the condensing heat exchanger 20, and then the liquid refrigerant may flow to the evaporating heat exchanger 40 through the first throttle 30. The evaporating heat exchanger 40 can be used as an outdoor heat exchanger, such as a gas-liquid heat exchanger, and can enable the flowing liquid refrigerant to absorb heat and fully vaporize through media such as air, spray cooling liquid and the like, and can also be used for enabling the refrigerant to quickly absorb heat through a liquid-liquid heat exchanger such as a plate heat exchanger or a shell-and-tube heat exchanger and the like.

For example, when the evaporation heat exchanger 40 is used for cooling the user side, as shown in fig. 2, the evaporation heat exchanger 40 may be a plate heat exchanger including a first evaporation heat exchange passage 41 and a second evaporation heat exchange passage 42, or a shell-and-tube heat exchanger, or the like. Wherein, along the flow direction of the refrigerant, one end of the first restrictor 30 away from the condensing heat exchanger 20 can be communicated with the air inlet end of the compressor 10 through the first evaporation heat exchange channel 41. Correspondingly, the air conditioner 100 may further include a plurality of indoor heat exchangers 51, a plurality of indoor temperature control valves 52, and at least one indoor circulation pump 53. The plurality of indoor heat exchangers 51 may be disposed in one-to-one correspondence with the plurality of indoor temperature control valves 52, that is, one indoor temperature control valve 52 may be connected with one indoor heat exchanger 51 to form one refrigeration branch. After the plurality of refrigeration branches are connected in parallel, one end of the refrigeration branches may be communicated with one end of the second evaporation heat exchange channel 42, and the other end of the refrigeration branches may be communicated with the other end of the second evaporation heat exchange channel 42 through the indoor circulation pump 53, so as to form a secondary circulation heat exchange branch.

Therefore, the secondary circulation heat exchange branch can be filled with the refrigerant capable of changing phase, and can also be filled with conventional cooling liquid (such as water). Taking the cooling liquid filled in the secondary circulation heat exchange branch as an example, the cooling liquid can circularly flow along the second evaporation heat exchange channel 42, the indoor temperature control valve 52, the indoor heat exchanger 51, the indoor circulation pump 53 and the second evaporation heat exchange channel 42 under the driving of the indoor circulation pump 53. When the cooling liquid flows through the second evaporation heat exchange channel 42, the liquid refrigerant flowing through the first evaporation heat exchange channel 41 can absorb heat of the cooling liquid and evaporate, so as to reduce the temperature of the cooling liquid. Then, when the low-temperature cooling liquid flows to the indoor heat exchanger 51, ambient air can quickly flow through the indoor heat exchanger 51 under the drive of the fan, and the cooling effect on the air is realized.

In the same refrigeration branch, an indoor thermostat 52 can be used to regulate the flow of cooling liquid through the indoor heat exchanger 51. If the temperature near the indoor heat exchanger 51 is high, the opening degree of the indoor thermostat 52 may be adjusted to increase the flow rate of the coolant, thereby increasing the cooling effect on the nearby air. If the temperature near the indoor heat exchanger 51 is low, the opening degree of the indoor thermostat 52 may be adjusted to decrease the flow rate of the coolant, thereby reducing the cooling effect on the nearby air. In the secondary circulation heat exchange branch, the number of the indoor circulation pumps 53 may be one, and the indoor circulation pumps 53 may be disposed near one of both ends of the second evaporation heat exchange passage 42 in the flow direction of the refrigerant. Alternatively, the number of the indoor circulation pumps 53 may be plural, and the indoor circulation pumps 53 and the indoor heat exchangers 51 are disposed in a one-to-one correspondence, that is, one indoor circulation pump 53, one indoor temperature control valve 52 and one indoor heat exchanger 51 may be sequentially connected to form one refrigeration branch, and the plural refrigeration branches are connected in parallel and then connected to two ends of the second evaporation heat exchange channel 42.

As the compressor 10 may comprise a piston compressor, a screw compressor, a centrifugal compressor, a linear compressor, etc. of different configurations. When the compressor 10 is a fuel injection type compressor, lubrication oil is required to reduce the rotation resistance of the internal structure during the continuous operation of the compressor 10, but part of the lubrication oil in the compressor 10 flows out from the air outlet end of the compressor 10 along with the compressed refrigerant, and if the lubrication oil flows into the evaporation heat exchanger 40 and the condensation heat exchanger 20, the lubrication oil attached to the inner wall of the heat exchanger reduces the heat exchange effect of the evaporation heat exchanger 40 and the condensation heat exchanger 20.

Based on this, as shown in fig. 3, the air conditioner 100 may further include an oil separator 50, and the oil separator 50 may be installed between the outlet end of the compressor 10 and the condensing heat exchanger 20. In this way, the high-temperature and high-pressure gaseous refrigerant can flow from the outlet end of the compressor to the oil separator 50, and the oil separator 50 can separate the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant, so as to avoid the lubricating oil adhering to the inner walls of the condensing heat exchanger 20 and the evaporating heat exchanger 40 when flowing through the two, so that the evaporating heat exchanger 40 and the condensing heat exchanger 20 have higher heat exchange efficiency.

When the compressor 10 is an oil-free compressor having a magnetic suspension structure or the like, lubrication by using lubricating oil is not required in the cylinder of the compressor 10, that is, when the high-temperature and high-pressure gaseous refrigerant flows out from the gas outlet end of the compressor 10, the lubricating oil is not mixed. At this time, there is no need to install an oil separator at the air outlet end of the compressor 10, and the structure is simple.

It should be noted that, the air conditioner 100 provided in the embodiment of the present application may be a large-sized central air conditioner such as a centrifugal chiller, a screw chiller, and the like. When the evaporation heat exchanger 40 is arranged, the liquid refrigerant can absorb heat and evaporate sufficiently in the process of flowing through the evaporation heat exchanger 40, so as to avoid the situation that the liquid refrigerant is sucked into the compressor 10 after flowing out of the evaporation heat exchanger 40, thereby causing the liquid impact damage of the compressor 10.

For example, a sufficient external heat source may be provided at the evaporating heat exchanger 40 by means of a plate heat exchanger, a shell and tube heat exchanger, a spray heat exchanger, etc., for complete evaporation and vaporization of the liquid refrigerant flowing therethrough. Alternatively, taking the case where the evaporative heat exchanger 40 is a shell-and-tube heat exchanger of a larger volume, it is possible to provide that the first evaporative heat exchange channel 41 is a larger chamber enclosed by the housing and the second evaporative heat exchange channel 42. An outlet of the first evaporation heat exchange passage 41 communicating with the intake end of the compressor 10 may be provided above the chamber. Thus, even if the liquid refrigerant cannot be evaporated in time in the chamber, the larger chamber can accumulate the liquid refrigerant below the first evaporation heat exchange channel 41 under the action of gravity, so as to avoid the liquid refrigerant flowing out from the outlet above the chamber and entering the air inlet end of the compressor 10. Based on this, there may be no need to arrange a gas-liquid separator at the intake end of the compressor 10.

For a large air conditioning unit, the heat exchange power of the air conditioner 100 may be increased by connecting a plurality of compressors 10 in parallel. As shown in fig. 4, fig. 4 is a schematic diagram of a connection structure of the air conditioner 100 shown in fig. 3 including a plurality of compressors 10, taking the example that the number of compressors 10 in the air conditioner 100 is two and the condensing heat exchanger 20 and the evaporating heat exchanger 40 are shell-and-tube heat exchangers. The compressor 10 may have an inlet end 11, an outlet end 12, and a liquid inlet end 13. Two condensation air inlets 21 may be formed on the condensation heat exchanger 20, and each condensation air inlet 21 is communicated with the air outlet end 12 of one compressor 10 through a pipeline. The condensing heat exchanger 20 is further provided with a condensing liquid outlet 22 and a condensing liquid return opening 23, the two condensing air inlets 21 are air inlet sides of the first condensing heat exchange channel, the condensing liquid outlet 22 and the condensing liquid return opening 23 are liquid outlet sides of the first condensing heat exchange channel, so that the refrigerant can liquefy and release heat in the first condensing heat exchange channel, and the released heat can be absorbed by external cooling liquid flowing in the second condensing heat exchange channel of the condensing heat exchanger 20, for example, the second condensing heat exchange channel can be circularly communicated with an external cooling tower.

With continued reference to fig. 4, the condensate outlet 22 may be connected to the first throttle 30 through a pipeline and then connected to the evaporation inlet 411, the evaporation inlet 411 on the evaporation heat exchanger 40 may be a liquid inlet side of the first evaporation heat exchange channel 41 (as shown in fig. 2), and two evaporation air outlets 412 provided on the evaporation heat exchanger 40 may be air outlet sides of the first evaporation heat exchange channel 41. And each of the gas outlets 412 may be connected to the gas inlet 11 of one of the compressors 10 by a pipe to provide the increased gaseous refrigerant to the compressor 10 for compression. In the evaporation heat exchanger 40, the first evaporation heat exchange passage 41 can absorb heat of the cooling liquid in the second evaporation heat exchange passage 42, so that the cooling liquid in the second evaporation heat exchange passage 42 can cool to the user side.

During operation of the compressor 10, heat is generated by friction of the rotating structure itself and the compressed refrigerant. In order to make the compressor 10 continuously operate in a temperature environment of a matter, with continued reference to fig. 4, the air conditioner 100 may further include a condensation circulation pump 60, and the condensation liquid return port 23 may be connected to the liquid inlet ends 13 of the plurality of compressors 10 through the condensation circulation pump 60, so that the refrigerant liquefied in the first condensation heat exchange channel may flow into the liquid inlet ends 13 of the compressors 10 under the driving of the condensation circulation pump 60, and the liquid refrigerant may absorb the heat generated by the compressors 10 in the compressors 10 and evaporate and vaporize, and then be introduced into the condensation air inlet 21 for circulation through the air outlet end 12 of the compressors 10, thereby implementing rapid cooling of the compressors 10.

The rotating speed of the variable frequency compressor 10 can be flexibly adjusted, so that the variable frequency compressor can be flexibly adapted to different user working conditions, and the energy efficiency ratio of the air conditioner can be improved. Based on this, the compressor 10 may be provided as a compressor of a variable frequency structure. In order to control the rotation speed of the inverter compressor 10, as shown in fig. 5, fig. 5 is a schematic circuit connection diagram of an air conditioner 100 according to an embodiment of the present application. The air conditioner 100 may further include a frequency converter 70, and the frequency converter 70 may be electrically connected with the compressor 10 and control the rotation speed of the compressor 10. In this way, the rotation speed of the compressor 10 can be flexibly adjusted through the frequency converter 70, so that the compressor 10 can be operated in an optimal rotation speed state according to different user working conditions, and the energy efficiency ratio of the air conditioner 100 is improved.

When the load of the working condition of the user is large, the frequency converter 70 needs to output large power to control the frequency-converted compressor 10 to operate at high speed, which results in a large heating value of the frequency converter 70. To solve the heat dissipation problem of the inverter 70.

As shown in fig. 6, the air conditioner 100 may further include a variable frequency heat sink assembly 90, and the variable frequency heat sink assembly 90 may include a water tank 91, a water-cooled heat exchanger 92, a heat-dissipating circulation pump 93, and a variable frequency heat exchanger 94.

Referring to fig. 7, the water-cooled heat exchanger 92 may be installed in contact with the inverter 70, or the water-cooled heat exchanger 92 may be installed in contact with the inverter 70 through other heat conducting structures for absorbing heat generated from the inverter 70. The water-cooled heat exchanger 92 may be a split component, that is, the water-cooled heat exchanger 92 may include two heat dissipation plates 921 and a water-cooled heat dissipation tube 922, a water-cooled heat exchange channel (not shown in the drawing) is formed in the water-cooled heat dissipation tube 922, the water-cooled heat dissipation tube 922 may be extruded between the two heat dissipation plates 921 and in contact with the two heat dissipation plates 921, the heat dissipation plates 921 may be in contact with the frequency converter 70, so that the cooling liquid flowing through the water-cooled heat exchange channel (i.e., in the water-cooled heat dissipation tube 922) may take away the heat generated by the frequency converter 70, and is used for rapidly cooling the frequency converter 70, so as to ensure that the frequency converter 70 may continuously run at low temperature, and has better stability.

In addition, the water-cooled heat exchanger 92 may be an integral member, a sidewall of the water-cooled heat exchanger 92 may contact the inverter 70, and a water-cooled heat exchanging channel (not shown) may be formed inside the water-cooled heat exchanger 92 for flowing a cooling liquid and taking away heat generated from the inverter 70. To rapidly cool the inverter, with continued reference to fig. 6, one end of the water-cooled heat exchanger 92 may be in communication with the water tank 91, and the other end of the water-cooled heat exchanger 92 may be in communication with one end of the inverter heat exchanger 94. And the variable frequency heat exchanger 94 may be communicated with the water tank 91 through a heat radiation circulation pump 93. Based on this, a proper amount of cooling liquid (such as cooling water or a mixed solution of water and an antifreezing agent) may be added into the water tank 91, and the cooling liquid may circulate in the water tank 91, the heat dissipation circulation pump 93, the variable frequency heat exchanger 94, the water-cooled heat exchanger 92 and the water tank 91 under the driving of the heat dissipation circulation pump 93. Thus, in conjunction with fig. 7, the heat generated by the inverter 70 during high-load operation can be quickly absorbed by the cooling liquid flowing through the water-cooled heat exchanger 92, and the heat can be quickly dissipated along with the cooling liquid flowing through the inverter heat exchanger 94, so as to realize a continuous and stable cooling effect on the inverter 70, so as to avoid damage to the inverter 70 caused by continuous high-temperature overload.

The heat radiation circulating pump 93 may be installed between the water tank 91 and the inverter heat exchanger 94 as shown in fig. 6. The heat radiation circulating pump 93 may be installed between the water-cooled heat exchanger 92 and the variable frequency heat exchanger 94. The cooling liquid can be driven to circulate in the water tank 91, the heat-dissipating circulating pump 93, the variable frequency heat exchanger 94, the water-cooling heat exchanger 92 and the water tank 91, which is not limited.

For the variable frequency heat exchanger 94, a heat exchanger of a gas-liquid structure such as a coil heat exchanger, a fin heat exchanger or a flat tube heat exchanger may be provided as the variable frequency heat exchanger 94 for heat exchange between gas and liquid. At this time, the variable frequency heat exchanger 94 is provided with a variable frequency first heat exchange channel corresponding to the water cooling heat exchange channel, one end of the variable frequency first heat exchange channel may be communicated with one end of the water cooling heat exchange channel, the other end of the water cooling heat exchange channel may be communicated with the liquid inlet side of the water tank 91, and the other end of the variable frequency first heat exchange channel may be communicated with the liquid outlet side of the water tank 91 through the heat dissipation circulating pump 93. So that the cooling fluid, after absorbing the heat from the inverter 70 at the water-cooled heat exchange channels, can dissipate heat to the nearby air through the inverter heat exchanger 94 at the first heat exchange channels. At this time, in order to improve the heat dissipation efficiency of the frequency conversion heat exchanger 94, the frequency conversion heat dissipation assembly 90 may further include a heat dissipation fan, which may be installed near the frequency conversion heat exchanger 94, for driving air to rapidly flow through the frequency conversion heat exchanger 94, so as to improve the heat exchange efficiency of the cooling liquid and the air in the frequency conversion first heat exchange channel, and satisfy the requirement of rapid heat dissipation.

In addition, the variable frequency heat exchanger 94 may be a liquid-liquid type heat exchanger such as a plate heat exchanger or a shell-and-tube heat exchanger, and may be used for heat exchange between liquids. Taking the variable frequency heat exchanger 94 as an example, as shown in fig. 8, fig. 8 is a schematic diagram of a connection structure of the variable frequency heat dissipation assembly 90 according to the embodiment of the present application for dissipating heat by the refrigerant circulation of the compressor 10. The variable frequency heat exchanger 94 may include a variable frequency first heat exchange channel 941 and a variable frequency second heat exchange channel 942. Along the flow direction of the refrigerant, the downstream port of the variable frequency first heat exchange channel 941 may be in communication with the water-cooled heat exchanger 92, and the upstream port of the variable frequency first heat exchange channel 941 may be in communication with the water tank 91 through the heat dissipation circulation pump 93.

Correspondingly, with continued reference to fig. 8, the variable frequency heat sink assembly 90 may further include a second restrictor 95, and one end of the variable frequency second heat exchange channel 942 may be in communication with the first restrictor 30 through the second restrictor 95. For example, an end of the second restrictor 95 away from the variable frequency heat exchanger 94 may be connected to any refrigerant line between the first restrictor 30 and the condensing heat exchanger 20 along the flow direction of the refrigerant. Alternatively, the end of the second restrictor 95 remote from the variable frequency heat exchanger 94 may be connected to any refrigerant line between the first restrictor 30 and the evaporative heat exchanger 40. It is only necessary to enable the liquid refrigerant to flow into the variable frequency second heat exchange channel 942 through the second restrictor 95 for evaporating and vaporizing in the variable frequency heat exchanger 94 and absorbing heat in the variable frequency first heat exchange channel 941, thereby rapidly taking away heat generated by the frequency converter 70 (as shown in fig. 7).

As shown in fig. 8, the refrigerant in the variable frequency second heat exchange channel 942 can flow out from the other end of the variable frequency second heat exchange channel 942 after evaporating and vaporizing by absorbing heat. Based on this, the end of the variable frequency second heat exchanging channel 942 may be provided to communicate with the inlet end of the compressor 10, thereby realizing the circulating flow of the refrigerant at the variable frequency second heat exchanging channel 942. In addition, the end of the variable frequency second heat exchange channel 942 may also be in communication with the outlet end of the first evaporative heat exchange channel.

It should be noted that, if the air conditioner 100 has only a single cooling mode, the end of the variable frequency second heat exchange channel 942 away from the second restrictor 95 may be provided to communicate with the end of the evaporation heat exchanger 40 away from the first restrictor 30.

To facilitate controlling the heat dissipation of the variable frequency heat sink assembly 90 so that the frequency converter 92 (shown in fig. 7) may be operated at a suitable temperature range, supercooling or overheating of the frequency converter 70 is avoided. As shown in fig. 9, the variable frequency heat sink assembly 90 may further include at least one of a temperature sensor 96 and a flow switch 97. For example, a temperature sensor 96 may be installed between the water-cooled heat exchanger 92 and the inverter heat exchanger 94 in the flow direction of the cooling liquid for detecting the temperature of the cooling liquid flowing from the inverter heat exchanger 94 to the water-cooled heat exchanger 92, and the temperature sensor 96 may output a temperature acquisition signal. The temperature sensor 96 may be installed near the variable frequency heat exchanger 94 or near the water-cooled heat exchanger 92, but is not limited thereto.

With continued reference to fig. 9 when the flow switch 97 is installed, the heat-dissipating circulation pump 93 may be in communication with the variable-frequency first heat exchange channel 941 through the flow switch 97, and the flow switch 97 may be used to monitor the flow rate of the coolant flowing through the heat-dissipating circulation pump 93 and output a flow rate acquisition signal. The flow switch 97 may be installed between the water tank 91 and the heat radiation circulating pump 93, and the flow rate acquisition signal may be output as well, which is not limited thereto.

Based on this, in connection with fig. 5, the air conditioner 100 may further include a controller 80, and the controller 80 may be electrically connected with the temperature sensor 96, the flow switch 97, the heat dissipation circulation pump 93, and the inverter 70. And the controller 80 can control the heat dissipation circulating pump 93 and the frequency converter 70 to start synchronously, so that the frequency conversion heat dissipation component can dissipate heat of the frequency converter 70 in time. When the frequency converter 70 is turned off, the heat dissipation circulating pump 93 may be turned off in a delayed manner to cool the waste heat of the frequency converter 70, and the delayed turn-off function of the heat dissipation circulating pump 93 may be satisfied by a delay relay. Correspondingly, the second restrictor 95 may also be provided as an electronic expansion valve, and the controller 80 may also be electrically connected to the second restrictor 95.

For example, the controller 80 may include a comparison circuit configured as a thermostat or relay, etc., to facilitate the advance setting of an appropriate preset temperature threshold. In this way, the controller 80 may receive the temperature acquisition signal output by the temperature sensor and compare the temperature acquisition signal with a first preset temperature threshold. When the temperature acquisition signal is greater than or equal to the first preset temperature threshold, it indicates that the temperature of the cooling liquid flowing out of the variable frequency heat exchanger 94 is higher, at this time, the controller 80 may control the second restrictor 95 to open or increase the opening degree to increase the flow rate of the cooling medium in the variable frequency second heat exchange channel 942, so that the temperature of the cooling liquid flowing out of the variable frequency first heat exchange channel 941 is lower, thereby rapidly cooling the frequency converter 70 and operating in a suitable temperature interval.

In addition, the first temperature threshold may be set to be greater than the second temperature threshold, and if the temperature acquisition signal received by the controller 80 is less than the second preset temperature threshold, it indicates that the temperature of the cooling liquid flowing out of the variable frequency heat exchanger 94 is lower, so that the frequency converter 70 is rapidly cooled and is operated in a lower temperature environment. At this time, the controller 80 may control the second restrictor 95 to decrease the opening degree or close. To reduce the flow of the refrigerant in the variable frequency second heat exchange channel 942 and even stop the circulating flow of the refrigerant in the variable frequency second heat exchange channel 942. Thereby allowing the higher temperature coolant flowing in the variable frequency first heat exchange channel 941 to avoid operating the frequency converter 70 in a lower temperature environment.

After receiving the temperature acquisition signal, the controller 80 may also adjust the operating temperature environment of the inverter 70 by controlling the rotational speed of the heat dissipation circulation pump 93. If the temperature acquisition signal is greater than or equal to the first preset temperature threshold, the controller 80 may increase the rotation speed of the heat dissipation circulation pump 93 to take away more heat of the frequency converter 70 through the rapid circulation flow of the cooling liquid. If the temperature acquisition signal is less than the second preset temperature threshold, the controller 80 may decrease the rotation speed of the heat-dissipating circulation pump 93, so as to decrease the flow rate of the cooling liquid, thereby reducing the heat exchange between the water-cooled heat exchanger 92 and the frequency converter 70.

In some embodiments, as shown in fig. 10, the variable frequency heat sink assembly 90 may further include a variable frequency heat exchanger tank 98, and the water tank 91, the heat-dissipating circulation pump 93, and the variable frequency heat exchanger 94 are mounted within the variable frequency heat exchanger tank 98. In the case where the variable frequency heat sink assembly 90 further includes the second restrictor 95, the temperature sensor 96 and the flow switch 97, the second restrictor 95, the temperature sensor 96 and the flow switch 97 are installed in the variable frequency heat sink box 98. Thus, when the variable frequency heat sink assembly 90 is disposed, the variable frequency heat exchange box 98 having the above-mentioned components mounted thereon may be disposed close to the outdoor unit of the air conditioner 100 or may be directly mounted in the outdoor unit, and then the water-cooled heat exchanger 92 (shown in fig. 7) may be mounted in contact with the frequency converter 70, and then the water-cooled heat exchanger may be passed through the variable frequency heat exchange box 98 through a pipe so that one end of the water-cooled heat exchange passage communicates with the water tank 91 and the other end of the water-cooled heat exchange passage communicates with the outlet side of the variable frequency first heat exchange passage. In the process, components such as the water tank 91, the heat dissipation circulating pump 93, the second restrictor 95 of the variable frequency heat exchanger 94, the temperature sensor 96, the flow switch 97 and the like are not required to be additionally installed and arranged, and the installation process is convenient and quick.

In the variable frequency heat sink assembly 90, the water tank 91 is a main structure for storing the cooling liquid. As shown in fig. 11, fig. 11 is a front view of a water tank 91 shown in fig. 10. The water tank 91 may be a split structure, including a tank main body 911 and a tank top cover 912, the tank main body 911 may enclose a solution chamber 913 having an opening at one side, the solution chamber 913 is used for containing a cooling liquid, and the tank top cover 912 may be disposed close to the opening of the solution chamber 913 and connected to an upper edge of the tank main body 911, taking an example that the opening of the solution chamber 913 is located at an upper side of the tank main body 911. The case main body 911 and the case top 912 may be connected to each other by rivets or welding, or the case main body 911 and the case top 912 may be detachably connected to each other by screws or a clip structure.

With continued reference to FIG. 11, one or more vent holes 9141 may be provided in the tank top cover 912 to equalize the air pressure inside and outside the solution chamber 913. Correspondingly, a liquid inlet 9142, a liquid outlet 9143 and a liquid outlet 9144 which are communicated with the solution cavity 913 can be formed on the tank main body 911. The liquid inlet 9142 and the liquid outlet 9143 may be formed on a side wall of the main tank body 911, for example, the liquid inlet 9142 and the liquid outlet 9143 may be formed on a front side wall of the main tank body 911 and distributed at intervals along a left-right direction. The drain hole 9144 may be formed near the bottom of the tank body 911, for example, the drain hole 9144 may be formed in the bottom wall of the tank body 911.

Based on this, during the process of installing the variable frequency heat dissipation assembly 90, along the flow direction of the cooling liquid, one end of the water-cooling heat exchange channel, which is close to the water tank 91, may be communicated with the liquid inlet 9142 for injecting the cooling liquid after absorbing heat into the solution cavity 913. The liquid outlet 9143 may be connected to one end of the variable frequency first heat exchange channel 941 near the water tank 91 through the heat dissipation circulation pump 93, and is used for extracting the cooling liquid (after absorbing heat) in the solution cavity 913 and cooling in the variable frequency first heat exchange channel 941.

As shown in fig. 12, fig. 12 is a right side view of the water tank shown in fig. 11. The case body 911 may be provided with a bar-shaped hole 9145, and the bar-shaped hole 9145 may be provided on a side wall (e.g., a right side wall) of the case body 911 and extend in the up-down direction. The water tank 91 may further include a second light-transmitting plate 915, and the second light-transmitting plate 915 may be connected to an edge of the strip-shaped hole 9145 and seal the strip-shaped hole 9145, thereby preventing leakage of cooling liquid from the strip-shaped hole 9145 in the solution chamber 913. Since the second light-transmitting plate 915 has better light transmittance, the liquid level of the cooling liquid in the tank main body 911 can be clearly observed through the second light-transmitting plate 915 and the strip-shaped holes 9145.

Illustratively, as shown in fig. 13, fig. 13 is a rear view of the tank shown in fig. 11. The side wall of the tank main body 911 may be provided with a liquid replenishing hole 9146 for replenishing the cooling liquid into the solution chamber 913. Referring to fig. 5, the tank 91 may further include a drain valve 916 and a make-up valve 917. Wherein, one end of the fluid-filling valve 917 may be in communication with the fluid-filling hole 9146, and the other end of the fluid-filling valve 917 may be used to connect a water supply pipe, and the fluid-filling valve 917 may be in a normally closed state.

Illustratively, one end of the drain valve 916 may be in communication with the drain hole 9144, and the drain valve 916 is also normally closed. The make-up valve 917 and the drain valve 916 may be electrically controlled valves, and the controller 80 may be electrically connected to the make-up valve 917 and the drain valve 916. The controller 80 may receive the flow rate acquisition signal of the flow switch 97, compare the flow rate acquisition signal with a preset flow rate threshold, and if the flow rate acquisition signal is less than or equal to the preset flow rate threshold, it indicates that the cooling liquid in the water tank 91 is less, and at this time, may control the valve of the liquid replenishment valve 917 to be opened so as to add replenishment cooling into the solution cavity 913.

The controller 80 may control the opening state of the fluid-filling valve 917 through a delay relay, and after a preset time, the delay relay may automatically close the fluid-filling valve 917, thereby avoiding the overflow of the replenished coolant from the solution chamber 913. In the case of the drain valve 916, if the air conditioner 100 is not activated for a long time, the drain valve 916 may be controlled to be opened by the controller 80 to drain the coolant in the solution chamber 913. The drain valve 916 may be a manual valve, that is, the drain valve 916 may be opened or closed manually, which is not limited thereto.

In other embodiments, the water tank 91 may be a unitary structure surrounded by the tank main body 911, which has better sealing performance. In this case, it is necessary to provide an air vent 9141 in the tank main body 911 to balance the air pressure inside and outside the solution chamber 913.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The present application is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. An air conditioner, comprising:

a compressor;

the frequency converter is electrically connected with the compressor and controls the rotating speed of the compressor;

and a variable frequency heat sink assembly comprising:

the water-cooling heat exchanger is arranged in contact with the frequency converter and is provided with a water-cooling heat exchange channel;

the water tank is used for containing cooling liquid, and one end of the water-cooling heat exchange channel is communicated with the water tank;

The variable-frequency heat exchanger is provided with a variable-frequency first heat exchange channel, one end of the variable-frequency first heat exchange channel is communicated with the water tank, and the other end of the variable-frequency first heat exchange channel is communicated with the other end of the water-cooling heat exchange channel;

the heat dissipation circulating pump is used for driving cooling liquid to circularly flow among the water cooling heat exchange channel, the water tank and the variable-frequency first heat exchange channel;

and the heat dissipation circulating pump, the water tank and the variable frequency heat exchanger are arranged in the variable frequency heat exchanger.

2. An air conditioner according to claim 1, wherein the air conditioner comprises:

the condensing heat exchanger is arranged on the bottom of the condenser,

one end of the first throttle is connected with one end of the condensing heat exchanger;

the other end of the first throttle is connected with one end of the evaporation heat exchanger; the compressor is provided with an air inlet end and an air outlet end, the air inlet end of the compressor is connected with the other end of the evaporation heat exchanger, and the air outlet end of the compressor is connected with the other end of the condensation heat exchanger, so that a refrigerant circularly flows among the compressor, the condensation heat exchanger, the first throttle and the evaporation heat exchanger;

The variable-frequency heat exchanger is a liquid-liquid type heat exchanger and is also provided with a variable-frequency second heat exchange channel, and the variable-frequency second heat exchange channel is used for absorbing heat of the variable-frequency first heat exchange channel;

the variable-frequency heat dissipation assembly further comprises a second restrictor, one end of the variable-frequency second heat exchange channel is communicated with the first restrictor through the second restrictor, and the other end of the variable-frequency second heat exchange channel is communicated with the air inlet end of the compressor.

3. The air conditioner according to claim 2, wherein the variable frequency heat radiating assembly includes a temperature sensor installed between the water-cooled heat exchanger and the variable frequency heat exchanger in a flow direction of the cooling liquid, for detecting a temperature of the cooling liquid flowing from the variable frequency heat exchanger to the water-cooled heat exchanger, and outputting a temperature acquisition signal;

the air conditioner further comprises a controller, wherein the second throttle is an electronic expansion valve and is used for controlling the flow of the refrigerant in the variable-frequency second heat exchange channel; the controller is electrically connected with the temperature sensor and the second throttle, and is used for receiving the temperature acquisition signal;

When the temperature acquisition signal is greater than or equal to a first preset temperature threshold value, the controller controls the second restrictor to increase the opening; when the temperature acquisition signal is smaller than a second preset temperature threshold value, the controller controls the second throttle to reduce the opening; the first preset temperature threshold is greater than the second preset temperature threshold.

4. The air conditioner of claim 3, wherein the controller is further electrically connected to the inverter and the heat-dissipating circulation pump, and controls the inverter and the heat-dissipating circulation pump to be turned on synchronously.

5. The air conditioner according to any one of claims 1 to 4, wherein the water tank has a liquid inlet hole, a liquid outlet hole, and a strip-shaped hole; along the flowing direction of the cooling liquid, one end of the water-cooling heat exchange channel, which is close to the water tank, is communicated with the liquid inlet hole, and the liquid outlet hole is communicated with one end of the variable-frequency first heat exchange channel, which is close to the water tank, through the heat dissipation circulating pump;

the water tank comprises a second light-transmitting plate, the strip-shaped holes extend in the vertical direction, and the second light-transmitting plate is connected with the edges of the strip-shaped holes and seals the strip-shaped holes.

6. The air conditioner of claim 5, wherein the variable frequency heat sink assembly further comprises:

the heat dissipation circulating pump is communicated with the variable-frequency first heat exchange channel through the flow switch; the flow switch is used for detecting the flow of the cooling liquid flowing through the heat dissipation circulating pump and outputting a flow acquisition signal;

the water tank is also provided with a fluid supplementing hole, one end of the fluid supplementing valve is communicated with the fluid supplementing hole, the other end of the fluid supplementing valve is used for being connected with a water supply pipe, and the fluid supplementing valve is in a normally closed state;

under the condition that the variable-frequency heat dissipation assembly further comprises a controller, the fluid supplementing valve is an electric control valve, the controller is electrically connected with the fluid supplementing valve and the flow switch, and the controller is used for receiving the flow acquisition signal;

when the flow acquisition signal is smaller than or equal to a preset flow threshold, the controller controls the liquid supplementing valve to be opened.

7. The air conditioner of claim 5, wherein the water tank further comprises:

the box body is surrounded to form a solution cavity with an opening at one side, the box body is provided with the liquid inlet hole, the liquid outlet hole and the strip-shaped hole, and the solution cavity is used for containing cooling liquid;

And the box top cover is arranged close to the opening of the solution cavity and is connected with the edge of the box main body close to the opening.

8. The air conditioner of claim 7, wherein the water tank further comprises a drain valve, the tank body is provided with a drain hole, the drain hole is arranged near a lower end of the tank body in the vertical direction and communicated with the solution cavity, and one end of the drain valve is communicated with the drain hole; and/or the number of the groups of groups,

the top cover of the tank is provided with an exhaust hole which is used for communicating the solution cavity and balancing the air pressure inside and outside the solution cavity.

9. The air conditioner according to any one of claims 2 to 4, wherein the evaporation heat exchanger is a liquid-liquid heat exchanger, the evaporation heat exchanger including a first evaporation heat exchange channel and a second evaporation heat exchange channel; the air conditioner further includes:

a plurality of indoor heat exchangers;

the indoor temperature control valves are arranged in one-to-one correspondence with the indoor heat exchangers; the indoor temperature control valve is communicated with the indoor heat exchanger to form a refrigeration branch, and the refrigeration branches are communicated in parallel;

the same ends of the plurality of refrigeration branches are communicated with one end of the second evaporation heat exchange channel, and the other ends of the plurality of refrigeration branches are communicated with the other end of the second evaporation heat exchange channel through the indoor circulation pump;

Along the flow direction of refrigerant, the one end that first throttle ware kept away from indoor condensation heat exchanger pass through first evaporation heat transfer passageway with the inlet end of compressor communicates, just first evaporation heat transfer passageway is used for absorbing the heat of second evaporation heat transfer passageway.

10. The air conditioner according to any one of claims 2 to 4, further comprising:

and the oil separator is arranged between the air outlet end of the compressor and the condensation heat exchanger and is used for filtering and separating lubricating oil flowing out of the compressor.