CN219640371U

CN219640371U - Air conditioner

Info

Publication number: CN219640371U
Application number: CN202320955370.5U
Authority: CN
Inventors: 魏留柱; 周宏亮; 程超; 姬安生; 张波; 龙小建; 宣卫豪; 付思远; 乐成承; 余军; 陈海威; 李凯龙
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-09-05
Anticipated expiration: 2033-04-24

Abstract

The utility model discloses an air conditioner, which comprises: a compressor provided with a first outlet and a first inlet; the first heat exchanger is used for exchanging heat with outdoor air and comprises a first heat exchange tube, and the first heat exchange tube is provided with a second inlet communicated with the first outlet and a second outlet; a throttle device provided with a third inlet communicated with the second outlet and a third outlet; the gas-liquid separator is provided with a refrigerant inlet communicated with the third outlet, a liquid outlet and a gas outlet communicated with the first inlet, and is used for separating gas from liquid of the refrigerant input by the refrigerant inlet and outputting liquid and gas of the refrigerant from the liquid outlet and the gas outlet respectively; and the second heat exchanger comprises a second heat exchange tube, and the second heat exchange tube is provided with a fourth inlet communicated with the liquid outlet and a fourth outlet communicated with the first inlet. The technical scheme provided by the utility model aims at solving the technical problem of how to improve the heat exchange efficiency.

Description

Air conditioner

Technical Field

The utility model relates to the technical field of refrigeration, in particular to an air conditioner.

Background

The pressure loss is small when the heat exchanger with the conventional pipe diameter is used for heat exchange, and the influence on the heat exchange performance of the heat exchanger is small.

But if the air conditioner uses CO ₂ The refrigerant has high system pressure, high side pressure up to 14MPa and low side pressure up to 3-5MPa. If a heat exchanger with a conventional pipe diameter is used as an evaporator for heat exchange, for example, a heat exchanger with a D5 pipe diameter, serious pressure loss can be caused, and the heat exchange efficiency of the system is low.

Taking a single-cooled integral air conditioner as an example, CO is adopted ₂ The refrigerant is used as working fluid to carry out transcritical cycle refrigeration, the pressure loss is increased, the heat exchange efficiency of the system cannot reach the optimum, and the air conditioner energy efficiency ratio is low.

Disclosure of Invention

The utility model mainly aims to provide an air conditioner, which aims to solve the technical problem of how to improve heat exchange efficiency.

The air conditioner includes:

a compressor provided with a first outlet and a first inlet;

the first heat exchanger is used for exchanging heat with outdoor air and comprises a first heat exchange tube, and the first heat exchange tube is provided with a second inlet and a second outlet which are communicated with the first outlet;

a throttle device provided with a third inlet communicated with the second outlet and a third outlet;

the gas-liquid separator is provided with a refrigerant inlet communicated with the third outlet, a liquid outlet and a gas outlet communicated with the first inlet, and is used for performing gas-liquid separation on the refrigerant input by the refrigerant inlet and outputting liquid refrigerant and gaseous refrigerant from the liquid outlet and the gas outlet respectively; and

the second heat exchanger comprises a second heat exchange tube, and the second heat exchange tube is provided with a fourth inlet communicated with the liquid outlet and a fourth outlet communicated with the first inlet.

In an exemplary embodiment, the air conditioner further includes:

a water receiving disc provided with a water tank for accommodating condensed water generated on the second heat exchanger;

the water-flushing wheel at least partially stretches into the water tank, and can throw condensed water in the water tank onto the first heat exchanger when rotating;

the motor is connected with the water-beating wheel in a transmission way and used for driving the water-beating wheel to rotate; and

and the cooling pipe is at least partially arranged in the water tank, and the gas outlet is communicated with the first inlet through the cooling pipe.

In an exemplary embodiment, the water tank is disposed below the first heat exchanger;

the first heat exchanger is provided with a through groove extending from the bottom to the top, and one side of the water-filling wheel, which is away from the water groove, is accommodated in the through groove.

In an exemplary embodiment, the cooling tube is connected to the bottom of the first heat exchanger.

In an exemplary embodiment, the air conditioner further includes

A first temperature sensor for detecting a pre-valve temperature of the refrigerant before flowing into the third inlet of the throttle device;

the water level sensor is used for detecting the depth of condensed water in the water tank; and

the motor is used for driving the water-beating wheel to rotate when the current depth of the condensed water is larger than or equal to a preset depth and the current temperature before the valve is larger than or equal to a preset temperature;

the preset depth is larger than the distance between the bottom of the water tank and the water beating wheel.

In an exemplary embodiment, the air conditioner further includes a first valve and a second valve;

the first valve is arranged on a pipeline which is communicated with the liquid outlet and the fourth inlet;

the second valve is disposed on a line that communicates the gas outlet with the cooling tube.

In an exemplary embodiment, the air conditioner further includes a second temperature sensor for detecting a temperature of the condensed water in the water tank;

the second valve is used for being opened when the current water temperature of the condensed water is greater than or equal to a preset temperature.

In an exemplary embodiment, the air conditioner further includes a third temperature sensor for measuring an air temperature of the outdoor air before exchanging heat with the first heat exchanger;

the preset temperature is the optimal valve front temperature of the refrigerant when the compressor is predicted to run at the maximum power according to the current air temperature of the outdoor air.

In an exemplary embodiment, the air conditioner further includes a third heat exchanger;

the third heat exchanger comprises a first heat exchange flow channel and a second heat exchange flow channel which can exchange heat with the first heat exchange flow channel;

the second outlet is communicated with the third inlet through the first heat exchange flow channel, and the fourth inlet is communicated with the first inlet through the second heat exchange flow channel.

In one illustrative embodiment, the refrigerant is carbon dioxide.

In an exemplary embodiment, the air conditioner further includes:

the shell is internally provided with a first air duct and a second air duct;

the first fan is arranged in the first air duct and used for driving air to flow along the first air duct; and

the second fan is arranged in the second air duct and used for driving air to flow along the second air duct;

the first heat exchanger is arranged in the second air duct, and the second heat exchanger is arranged in the first air duct.

In the refrigeration mode, the compressor pressurizes the refrigerant and then conveys the refrigerant to the first heat exchanger, the refrigerant transfers heat to outdoor air to cool and liquefy when passing through the first heat exchanger, the liquefied refrigerant is conveyed to the throttling device, the static pressure of the refrigerant is reduced when the refrigerant flows through the throttling device, and a part of the refrigerant is gasified, so that the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixing state is conveyed to the gas-liquid separator for gas-liquid separation, the gas-liquid separator conveys the separated liquid refrigerant to the second heat exchange tube of the second heat exchanger, the refrigerant absorbs heat of indoor air when flowing through the second heat exchange tube, so that the indoor air is cooled, and the refrigerant output from the gas outlet of the second heat exchange tube and the gas-liquid separator can flow back to the compressor again for compression.

In the process, the refrigerant in the gas-liquid mixing state is separated into the liquid refrigerant and the gaseous refrigerant by the gas-liquid separator, the liquid refrigerant is conveyed to the second heat exchanger to exchange heat with indoor air, and the gaseous refrigerant does not enter the second heat exchanger to exchange heat, so that the pressure loss of the refrigerant when flowing through the second heat exchanger can be greatly reduced, the heat exchange efficiency of the whole system is improved, and the energy efficiency ratio of the air conditioner is further improved.

Drawings

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

Fig. 1 is a schematic cross-sectional view of an air conditioner according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating connection of internal pipelines of an air conditioner according to an embodiment of the present utility model;

FIG. 3 is a schematic front view of a first heat exchanger, a water pump, and a motor according to an embodiment of the present utility model;

FIG. 4 is a schematic top view of a first heat exchanger, a water pump, and a motor according to an embodiment of the present utility model;

FIG. 5 is a schematic left-hand view of a first heat exchanger, a water-filled wheel, and a motor in an embodiment of the utility model;

fig. 6 is a schematic cross-sectional view of a first heat exchanger in an embodiment of the utility model.

Reference numerals illustrate:

100. an air conditioner; 1a, a motor; 2a, a water beating wheel; 1. a compressor; 2. a first heat exchanger; 21. a first heat exchange tube; 211. a second inlet; 212. a second outlet; 22. a first fin; 23. a through groove; 3. a throttle device; 31. a third inlet; 32. a third outlet; 4. a gas-liquid separator; 41. a refrigerant inlet; 42. a liquid outlet; 43. a gas outlet; 5. a second heat exchanger; 51. a second heat exchange tube; 511. a fourth inlet; 512. a fourth outlet; 6. a third heat exchanger; 61. a first heat exchange flow passage; 62. a second heat exchange flow passage; 71. a first valve; 72. a second valve; 8. a water tank; 9. a cooling tube; 10. a housing; 101. a first air duct; 102. a second air duct; 103. a first air inlet; 104. a first air outlet; 105. a second air inlet; 106. a second air outlet; 107. a partition plate; 20. a first fan; 30. and a second fan.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. 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 addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

As shown in fig. 1 and 2, fig. 1 and 2 show a structure of an air conditioner 100 in the present embodiment. The air conditioner 100 may be a unitary air conditioner 100. The air conditioner 100 includes a housing 10, a compressor 1, a first heat exchanger 2, a throttling device 3, a gas-liquid separator 4, a second heat exchanger 5, a first fan 20, and a second fan 30.

The housing 10 of the air conditioner 100 may be configured as a rectangular housing. The wall surface of the shell 10 is provided with a first air inlet 103, a first air outlet 104, a second air inlet 105 and a second air outlet 106. The first air inlet 103 and the first air outlet 104 may be disposed at one side of the housing 10, and the second air inlet 105 and the second air outlet 106 may be disposed at the other side of the housing 10. A first air duct and a second air duct are provided in the housing 10. The first air duct extends from the first air inlet 103 to the first air outlet 104. The second air duct extends from the second air inlet 105 to the second air outlet 106. The first air duct 101 and the second air duct 102 may be partitioned by a partition 107 provided in the housing 10, and the first air duct 101 and the second air duct 102 are not connected to each other.

In the installed state of the air conditioner 100, the first air inlet 103 is connected to an indoor space inside the building or to an outdoor space outside the building, the first air outlet 104 is connected to an indoor space inside the building, the second air inlet 105 is connected to an indoor space inside the building or to an outdoor space outside the building, and the second air outlet 106 is connected to an outdoor space outside the building.

The first fan 20 may be a centrifugal fan, a cross-flow fan, or an axial flow fan. The first fan 20 is disposed in the first air duct 101, and the first fan 20 can drive the airflow in the first air duct 101 to flow along the first air duct 101, and the airflow direction in the first air duct 101 flows from the first air inlet 103 to the first air outlet 104. When the first fan 20 is operated, indoor air in the inner chamber space is sucked into the first air duct 101 from the first air inlet 103 and then is conveyed to the indoor space through the first air outlet 104.

The second fan 30 may be a centrifugal fan, a cross-flow fan, or an axial flow fan. The second fan 30 is disposed in the second air duct 102, and the second fan 30 can drive the airflow in the second air duct 102 to flow along the second air duct 102, where the airflow direction in the second air duct 102 is from the second air inlet 105 to the second air outlet 106. When the second fan 30 is operated, the outdoor air in the outdoor space is sucked into the second air duct 102 from the second air inlet 105 and then is delivered to the outdoor room through the second air outlet 106.

As shown in fig. 2, the compressor 1 is provided with a first inlet 11 and a first outlet 12. The compressor 1 can suck the refrigerant from the first inlet 11 during operation, pressurize the refrigerant, and output the refrigerant from the first outlet 12. Since the refrigerant is compressed by the compressor 1, the temperature of the refrigerant is high when the refrigerant is output from the first outlet 12 of the compressor 1.

The refrigerant is carbon dioxide. Carbon dioxide is one of the main components of air, has no damage to the atmospheric ozone layer, has wide sources and low price, can greatly reduce the cost of refrigerant substitution, saves energy, solves the problem of pollution of the conventional refrigerant to the environment, and has good economical efficiency. Carbon dioxide is used as a refrigerant, is safe, nontoxic, nonflammable and non-explosive, has good thermal stability, can not decompose harmful gas even at high temperature, and has no harm to human body and ecology due to carbon dioxide leakage. Carbon dioxide has thermal physical properties suitable for refrigeration cycle and equipment, has small molecular weight and large refrigeration capacity, and the refrigeration capacity of a carbon dioxide refrigerant is 5-8 times higher than that of a conventional refrigerant, so that the size and weight of the compressor 1 can be obviously reduced for a refrigeration system with the same refrigeration load, and the whole air conditioner 100 is very compact; the lubrication condition is easy to meet, the common materials of the refrigeration system are not corroded, the sealing performance of the open-type compressor 1 can be improved, and leakage is reduced. The viscosity of carbon dioxide is small, the flow resistance of fluid is small, the heat transfer performance is good, and the heat dissipation of the totally-enclosed compressor 1 can be improved.

The first heat exchanger 2 may be a fin heat exchanger. The first heat exchanger 2 includes a first heat exchange tube 21 and a plurality of first fins 22. The first heat exchange tube 21 may be a metal tube, such as a copper tube. The plurality of first fins 22 are arranged side by side, two adjacent first fins 22 are arranged at intervals, and the first fins 22 are connected to the first heat exchange tube 21. The first heat exchange tube 21 is one or a plurality of in parallel. The first heat exchange tube 21 is provided with a second inlet 211 and a second outlet 212. The second inlet 211 and the second outlet 212 are respectively located at opposite ends of the first heat exchange tube 21. In the cooling mode of the air conditioner 100, the second inlet 211 of the first heat exchange tube 21 is connected to the first outlet 12 of the compressor 1, the compressor 1 sends high-temperature and high-pressure refrigerant to the first heat exchange tube 21 through the second inlet 211, and the refrigerant flows through the first heat exchange tube 21 and is output from the second outlet 212. The first heat exchanger 2 is disposed in the second air duct 102, and when the outdoor air in the second air duct 102 flows through the first heat exchanger 2, the outdoor air exchanges heat with the refrigerant flowing through the first heat exchange tube 21, and the outdoor air takes away a part of heat of the refrigerant, so that the refrigerant is cooled and liquefied in the first heat exchange tube 21.

The throttle device 3 may be a throttle valve or a capillary tube. The throttle device 3 is provided with a third inlet 31, a third outlet 32 and a throttle passage. The throttle passage is connected at both ends to the third inlet 31 and the third outlet 32, respectively. The throttling channel is provided with a throttling part with a contracted inner diameter, and the inner diameter of the throttling part is smaller than the inner diameter of other parts of the throttling channel. The third inlet 31 of the throttling means 3 communicates with the second outlet 212 of the first heat exchange tube 21. The high-pressure refrigerant outputted from the first heat exchange tube 21 enters the throttle device 3 through the third inlet 31, flows through the throttle passage, and then is outputted from the third outlet 32 to the throttle device 3. When the refrigerant flows through the throttling part of the throttling channel, the flow rate of the refrigerant is increased and the static pressure is reduced due to the narrowing of the flow channel, part of the liquid refrigerant is gasified into the gaseous refrigerant, and the refrigerant output by the third outlet 32 of the throttling device 3 is the refrigerant in a gas-liquid mixed state.

The gas-liquid separator 4 is used for separating the refrigerant into gas and liquid. The gas-liquid separator 4 may be a gravity sedimentation type gas-liquid separator, a baffle separation type gas-liquid separator, a centrifugal separation type gas-liquid separator, a wire mesh separation type gas-liquid separator, a microporous filtration separation type gas-liquid separator or a filler separation type gas-liquid separator. The gas-liquid separator 4 is provided with a refrigerant inlet 41, a liquid outlet 42, and a gas outlet 43. The refrigerant inlet 41 of the gas-liquid separator 4 is connected to the third outlet 32 of the throttle device 3, and the throttle device 3 injects the refrigerant in a gas-liquid mixture state into the gas-liquid separator 4 through the refrigerant inlet 41. The gas-liquid separator 4 performs gas-liquid separation of the refrigerant in a gas-liquid mixture state, and then outputs a gaseous refrigerant from the gas outlet 43 and a liquid refrigerant from the liquid outlet 42. The gas outlet 43 of the gas-liquid separator 4 is connected to the first inlet 11 of the compressor 1, and the gaseous refrigerant can flow back to the compressor 1.

The second heat exchanger 5 may be a fin heat exchanger. The second heat exchanger 5 includes a second heat exchange tube 51 and a plurality of second fins. The second heat exchange tube 51 may be a metal tube, and may be a copper tube. The plurality of second fins are arranged side by side, two adjacent second fins are arranged at intervals, and the second fins are connected to the second heat exchange tube 51. The second heat exchange tube 51 may be one or a plurality of in parallel. The second heat exchange tube 51 is provided with a fourth inlet 511 and a fourth outlet 512. The fourth inlet 511 and the fourth outlet 512 are provided at opposite ends of the second heat exchange tube 51, respectively.

In the cooling mode of the air conditioner 100, the fourth inlet 511 of the second heat exchanging pipe 51 is connected to the liquid outlet 42 of the gas-liquid separator 4, and the fourth outlet 512 of the second heat exchanging pipe 51 is connected to the first inlet 11 of the compressor 1. The second heat exchanger 5 is disposed in the first air duct 101. When the indoor air in the first air duct 101 flows through the second heat exchanger 5, the refrigerant flowing through the second heat exchange tube 51 exchanges heat with the indoor air, the indoor air absorbs the cold energy of the refrigerant and cools, the indoor air can be return air, the cooled indoor air is conveyed to the indoor space again, the liquid refrigerant in the second heat exchange tube 51 absorbs the heat of the indoor air and then gasifies to become a gaseous refrigerant or a gas-liquid mixed state refrigerant, and then the gaseous refrigerant and the gas-liquid mixed state refrigerant flow back to the compressor 1 again for the next refrigeration cycle.

In this way, in the cooling mode, the compressor 1 pressurizes the refrigerant and then conveys the refrigerant to the first heat exchanger 2, the refrigerant transfers heat to the air leading to the outside to cool and liquefy when passing through the first heat exchanger 2, the liquefied refrigerant is conveyed to the throttling device 3, the static pressure of the refrigerant is reduced when the refrigerant flows through the throttling device 3, and a part of the refrigerant is gasified, so that the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixture state is transferred to the gas-liquid separator 4 for gas-liquid separation, the gas-liquid separator 4 transfers the separated liquid refrigerant to the second heat exchange tube 51 of the second heat exchanger 5, and the refrigerant absorbs heat of indoor air when flowing through the second heat exchange tube 51, thereby cooling the indoor air, and the refrigerant outputted from the gas outlet 43 of the second heat exchange tube 51 and the gas-liquid separator 4 can be re-flowed back to the compressor 1 to be compressed again.

In the process, the refrigerant in the gas-liquid mixing state is separated into the liquid refrigerant and the gaseous refrigerant by the gas-liquid separator 4, then the liquid refrigerant is conveyed to the second heat exchanger 5 to exchange heat with indoor air, and the gaseous refrigerant does not enter the second heat exchanger 5 to exchange heat, so that the pressure loss of the refrigerant when flowing through the second heat exchanger 5 can be greatly reduced, the heat exchange efficiency of the whole system is improved, and the energy efficiency ratio of the air conditioner is further improved.

In an exemplary embodiment, as shown in fig. 3 to 6, the air conditioner 100 further includes a water receiving tray (not shown), a water-drawing wheel 2a, a motor 1a, and a cooling pipe 9.

The water pan is constructed in a disk-shaped structure, and a water tank 8 is arranged in the water pan. The water tank 8 of the water pan is arranged below the first heat exchanger 2 and the second heat exchanger 5, and the opening of the water tank 8 faces the first heat exchanger 2 and the second heat exchanger 5. The water tank 8 is to be understood in a broad sense, the same water tank 8 can be arranged below the first heat exchanger 2 and the second heat exchanger 5, or different water storage mechanisms can be arranged below the first heat exchanger 2 and the second heat exchanger 5, the different water storage mechanisms are connected through a water delivery mechanism, and the water storage mechanism and the water delivery mechanism jointly form the water tank 8. In the cooling mode, the temperature of the surface of the second heat exchanger 5 is lower than the temperature of the indoor air, the water vapor in the indoor air is pre-cooled and condensed on the surface of the second heat exchanger 5 to form condensed water when the indoor air flows through the second heat exchanger 5, the condensed water is condensed into water drops under the action of gravity and then drops into the water receiving disc, the condensed water is collected into the water tank 8 of the water receiving disc, and the condensed water can flow below the first heat exchanger 2.

The water-filling wheel 2a is constructed in a circular structure. The motor 1a is connected with the water beating wheel 2a in a transmission way, and the motor 1a can drive the water beating wheel 2a to rotate around the axis of the water beating wheel. The main shaft of the motor 1a may be directly connected with the water-beating wheel 2a, or the main shaft of the motor 1a may be connected with the water-beating wheel 2a through a transmission mechanism. The transmission may be a gear mechanism, a chain transmission or a belt transmission. The axis of the water-flushing wheel 2a may be parallel to the bottom surface of the water tank 8. At least part of the water-filling wheel 2a extends into the water tank 8, and the condensed water in the water tank 8 can submerge a part of the water-filling wheel 2a. The water-pumping wheel 2a can throw out the condensed water in the water tank 8 to the outer side of the water-pumping wheel 2a when rotating, and part of the condensed water thrown out by the water-pumping wheel 2a can directly splash on the first heat exchanger 2. The condensed water can cool down the first heat exchanger 2, so that the heat exchange efficiency of the first heat exchanger 2 is improved.

As shown in fig. 2, the cooling tube 9 may be a metal tube, such as a copper tube. One end of the cooling pipe 9 is connected to the first inlet 11 of the compressor 1 through a pipeline, and the other end of the cooling pipe 9 is connected to the gas outlet 43 of the gas-liquid separator 4 through another pipeline. The cooling tube 9 is at least partially arranged in the water trough 8 of the water pan. The cooling pipes 9 may be all arranged in the water tank 8 of the water pan.

The gaseous refrigerant outputted from the gas outlet 43 of the gas-liquid separator 4 flows through the cooling pipe 9 and then flows back into the compressor 1. The gaseous refrigerant can cool down the condensed water in the water tank 8 of the water receiving tray when flowing through the cooling pipe 9, so that the cooling effect of the condensed water on the first heat exchanger 2 can be further improved, and the heat exchange efficiency of the first heat exchanger 2 is improved.

In an exemplary embodiment, as shown in fig. 4 and 6, the first heat exchanger 2 is provided with a through groove 23. The through slots 23 may be adjacent. The side of the water-filling wheel 2a facing away from the water tank 8 of the water-receiving tray extends into the through groove 23. The motor 1a is arranged at one side of the first heat exchanger 2, and a main shaft of the motor 1a extends into the through groove 23 and is connected with the water beating wheel 2a. The water-filling wheel 2a is arranged coaxially with the main shaft of the motor 1a.

The water-flushing wheel 2a can throw condensed water to the parts of the first heat exchanger 2 located at the two sides of the through groove 23, and at the same time, can throw the condensed water to the top of the shell 10, and the condensed water drops from the top of the shell 10 to the top of the first heat exchanger 2 and then flows downwards along the first heat exchanger 2, so that the whole first heat exchanger 2 is soaked.

In an exemplary embodiment, as shown in fig. 5, the bottom of the first heat exchanger 2 is connected to a cooling pipe 9. The cooling tube 9 may be connected to the first heat exchanger 2 at one end thereof facing downward with the first fin 22. The cooling tube 9 vertically penetrates the plurality of first fins 22.

The cooling pipe 9 is fixed at the bottom of the first heat exchanger 2, and the cooling pipe 9 does not shake to knock the water pan when the air conditioner 100 is operated.

In another exemplary embodiment, the cooling pipe 9 may also be provided separately from the first heat exchanger 2.

In one exemplary embodiment, the air conditioner 100 further includes a first temperature sensor, a water level sensor, and a controller. The first temperature sensor may be provided at the third inlet 31 of the throttle device 3 or may be provided on a line to which the third inlet 31 is connected. The first temperature sensor is used for measuring the pre-valve temperature of the refrigerant, which is the temperature of the refrigerant before the refrigerant flows into the throttling device 3. The water level sensor may be provided in the water tank 8 for detecting the depth of condensed water in the water tank 8.

The controller is a logic control unit of the air conditioner 100. The controller is electrically connected to the first temperature sensor, the water level sensor and the motor 1a. The controller is configured to implement a control method of the air conditioner 100, the control method including the steps of:

step S0: the controller drives the compressor 1, the first fan 20 and the second fan 30 to operate, and the step S1 is entered;

after the controller receives the cooling command, the compressor 1, the first fan 20, and the second fan 30 are driven to operate so that the air conditioner 100 starts to enter the cooling cycle.

Step S1: the controller controls the water level sensor to detect the current depth of the condensed water in the water tank 8, and the step S2 is performed;

step S2: the controller judges whether the current depth of the condensed water in the water tank 8 is larger than a preset depth, if so, the step S3 is carried out, otherwise, the step S1 is carried out;

the preset depth is a preset value. The preset depth is set to be smaller than or equal to the maximum depth of the water tank 8 and is larger than the distance from the bottom of the water tank 8 to the water beating wheel 2a.

When the depth of the condensed water in the water tank 8 of the water receiving disc is larger than the preset depth, the condensed water immersed part in the water tank 8 is provided with a water-filling wheel 2a.

Step S3: the controller controls the first temperature sensor to detect the current temperature of the refrigerant before the valve, and the step S4 is performed;

step S4: the controller judges whether the current temperature before the valve is greater than or equal to the preset temperature, if so, the step S5 is carried out, otherwise, the step S3 is carried out.

The preset temperature is a preset value, can be calibrated in advance, and indicates that the current temperature is too high before the valve and needs to be cooled when the current temperature before the valve is larger than or equal to the preset temperature. The preset temperature may be an optimal pre-valve temperature of the refrigerant when the compressor 1 is operated at the maximum power. The optimal pre-valve temperature is a pre-valve temperature at which the compressor 1 is operated at maximum power and the cooling capacity of the air conditioner 100 is maximized.

Step S5: the controller controls the motor 1a to drive the water-filling wheel 2a to rotate.

When the depth of the condensed water in the water tank 8 is detected to be larger than the preset depth and the current temperature before the valve is larger than the preset temperature, enough condensed water submerging the part of the water-flushing wheel 2a exists in the water tank 8 at the moment, the first heat exchanger 2 needs to be cooled to further reduce the temperature before the valve of the refrigerant, the controller drives the motor 1a to drive the water-flushing wheel 2a to rotate, the water-flushing wheel 2a throws the condensed water onto the first heat exchanger 2 to reduce the temperature before the valve of the refrigerant, and the refrigerating capacity of the air conditioner 100 is improved.

And when the condensed water in the water tank 8 is insufficient or the first heat exchanger 2 does not need to be cooled, the motor 1a is not started to reduce the energy consumption.

In one illustrative embodiment, the air conditioner 100 further includes a first valve 71 and a second valve 72. The first valve 71 and the second valve 72 may be electrically operated valves. The first valve 71 is provided on a line that communicates the liquid outlet 42 of the gas-liquid separator 4 with the fourth inlet 511 of the second heat exchange tube 51. The second valve 72 is provided on a line that communicates the gas outlet 43 of the gas-liquid separator 4 with one end of the cooling pipe 9.

The output of the liquid refrigerant in the gas-liquid separator 4 can be controlled by opening and closing the first valve 71, and the output of the gaseous refrigerant can be controlled by opening and closing the second valve 72.

In one illustrative embodiment, the air conditioner 100 further includes a second temperature sensor. The controller is electrically connected to the first valve 71, the second valve 72 and the second temperature sensor. The second temperature sensor is arranged in the water tank 8 of the water receiving disc. The second temperature sensor is used for measuring the water temperature of the condensed water in the water tank 8.

Step S0 further comprises: the controller opens the first valve 71 and closes the second valve 72.

When the controller starts to enter the refrigeration cycle by driving the compressor 1 to operate, the first valve 71 is opened, the second valve 72 is closed, the refrigerant in the gas-liquid separator 4 can be output from the liquid outlet 42 of the gas-liquid separator 4 to the second heat exchanger 5, and the gaseous refrigerant in the gas-liquid separator 4 cannot be output from the gas outlet 43 of the gas-liquid separator 4 to the cooling pipe 9.

Since the cooling is started, the condensed water in the water tank 8 of the water receiving tray is very small, and at this time, it is unnecessary to feed the gaseous refrigerant into the cooling pipe 9.

The control method further includes steps S6 to S8 after step S5.

Step S6: the controller obtains the current water temperature of the condensed water in the water tank 8 through a second temperature sensor, and the step S7 is performed;

step S7: the controller judges whether the current water temperature is greater than or equal to a preset temperature, if so, the step S8 is carried out, otherwise, the step S6 is carried out;

the preset temperature is a preset value and can be calibrated in advance. The preset temperature may be the current pre-valve temperature or the optimal pre-valve temperature of the refrigerant when the compressor 1 is operated at the maximum power.

Step S8: the controller opens the second valve 72.

The temperature of the refrigerant fed from the compressor 1 to the first heat exchanger 2 is up to 110 degrees celsius. Condensed water in the water tank 8 of the water receiving disc is thrown onto the first heat exchanger 2, and after absorbing heat emitted by the first heat exchanger 2, the condensed water drops into the water tank 8, the water temperature of the condensed water in the water tank 8 can rise gradually along with the time, and the water temperature can be higher than 60 ℃. When the current water temperature obtained by the second temperature sensor is greater than or equal to the preset temperature, it is indicated that the water temperature of the condensed water in the water tank 8 is too high, and the condensed water may heat the refrigerant with the lower temperature at the end of the first heat exchange tube 21. At this time, the second valve 72 is opened, so that the gaseous refrigerant in the gas-liquid mixer can be conveyed to the cooling pipe 9 to cool the condensed water in the water tank 8, the water temperature of the condensed water is reduced, and the condensed water can continuously cool the first heat exchanger 2, thereby avoiding the condensed water in the water tank 8 from heating the refrigerant flowing through the first heat exchanger 2, and improving the heat exchange efficiency. At this time, the first valve 71 may remain open.

In step S8, the controller may also adjust the opening of the second valve 72, for example, the opening of the second valve 72 may be adjusted according to the current water temperature of the condensed water.

In one exemplary embodiment, the air conditioner 100 further includes a third temperature sensor. The third temperature sensor is electrically connected to the controller. The third temperature sensor may be disposed within the second air duct 102 upstream of the first heat exchanger 2. The third temperature sensor may be provided at the second air inlet 105. The third temperature sensor can measure the air temperature of the outdoor air before heat exchange with the first heat exchanger 2, i.e., the air temperature of the outdoor air located upstream of the first heat exchanger 2 in the second air duct 102 or the air temperature of the outdoor space.

Step S4a and step S4b are also included before step S4 of the control method.

Step S4a: the controller controls the third temperature sensor to measure the current air temperature of the outdoor air before heat exchange with the first heat exchanger 2, and the step S4b is performed;

step S4b: the controller predicts the optimal pre-valve temperature of the refrigerant when the compressor 1 operates at the maximum power according to the current air temperature of the outdoor air, takes the optimal pre-valve temperature as the preset temperature, and proceeds to step S4.

The air temperature of the outdoor air before heat exchange with the first heat exchanger 2 has a corresponding relation with the optimal pre-valve temperature of the refrigerant when the compressor 1 operates at the maximum power, the corresponding relation between the air temperature of the outdoor air and the optimal pre-valve temperature can be calibrated in advance, and the controller can acquire the optimal pre-valve temperature corresponding to the current air temperature according to the current air temperature of the outdoor air and takes the optimal pre-valve temperature as the preset temperature.

In steps S4 and S5, when the current pre-valve temperature is greater than or equal to the preset temperature, the motor 1a drives the water-flushing wheel 2a to rotate so as to throw condensed water onto the first heat exchanger 2 to cool the first heat exchanger 2, so that the pre-valve temperature can be adjusted to be close to or equal to the preset temperature. In step S7, the condensed water is cooled when the temperature of the condensed water is greater than or equal to a preset temperature so that the temperature of the condensed water is kept below the preset temperature. In the steps S4a and S4b, the optimal pre-valve temperature is predicted in advance from the current air temperature of the outdoor air, and is set as a preset temperature, whereby the pre-valve temperature can be adjusted to be close to or equal to the optimal pre-valve temperature, the cooling capacity of the air conditioner is maximized, and the energy efficiency ratio of the air conditioner 100 is high.

In an exemplary embodiment, the air conditioner 100 further includes a third heat exchanger 6. The third heat exchanger 6 includes a first heat exchange flow passage 61 and a second heat exchange flow passage 62. A heat conduction wall surface is arranged between the first heat exchange flow channel 61 and the second heat exchange flow channel 62 at intervals. The heat transfer wall surface separates the first heat exchange flow passage 61 and the second heat exchange flow passage 62 from each other. The heat-conducting wall surface may be made of a material with good heat-conducting property, such as a metal material. The fluid in the first heat exchange flow channel 61 and the fluid in the second heat exchange flow channel 62 can transfer heat through the heat conducting wall surface to realize heat exchange. The heat transfer wall surfaces may be wall surfaces of the flow channels, the first heat transfer flow channel 61 and the second heat transfer flow channel 62 may share the same heat transfer wall surface, or may be provided with heat transfer wall surfaces, respectively, and a heat transfer material is provided between the heat transfer wall surfaces of the first heat transfer flow channel 61 and the second heat transfer flow channel 62.

Both ends of the first heat exchange flow passage 61 are respectively communicated with the second outlet 212 of the first heat exchange tube 21 and the third inlet 31 of the throttle device 3. One end of the second heat exchanging flow path 62 is connected to the fourth inlet 511 of the second heat exchanging pipe 51 and the fifth inlet 521 of the third heat exchanging pipe 52, and the other end of the second heat exchanging flow path 62 is connected to the first inlet 11 of the compressor 1.

In this way, the high-temperature liquid refrigerant output by the first heat exchanger 2 flows through the first heat exchange flow channel 61 of the third heat exchanger 6 and then is conveyed to the throttling device 3, the low-temperature gaseous refrigerant output by the second heat exchanger 5 flows through the second heat exchange flow channel 62 of the third heat exchanger 6 and then flows back to the compressor 1, the low-temperature gaseous refrigerant in the second heat exchange flow channel 62 absorbs heat of the high-temperature liquid refrigerant in the first heat exchange flow channel 61, the temperature of the liquid refrigerant conveyed to the throttling device 3 is further reduced, the temperature of the refrigerant flowing through the second heat exchanger 5 is further reduced, the heat exchange efficiency between the second heat exchanger 5 and indoor air is higher, and the heat exchange effect is remarkably improved.

In some embodiments, the temperature of the refrigerant output from the second heat exchanger 5 is 15-16 ℃ under the condition of 35/24 ℃ in the air conditioner, the temperature is relatively reduced, and the temperature of the refrigerant output from the first heat exchanger 2 is more than 45 ℃ and the temperature is relatively higher. The two heat exchangers can exchange heat in the third heat exchanger 6 efficiently, so that the temperature of the refrigerant output by the first heat exchanger 2 can be further reduced before entering the second heat exchanger 5.

In an exemplary embodiment, the third heat exchanger 6 is a regenerator. The first heat exchange flow channel 61 is a tube side channel of the regenerator. The second heat exchange flow path 62 is the shell side path of the regenerator.

The refrigeration cycle system in the embodiment shown in fig. 2 can be used for a split type air conditioner in addition to the integrated air conditioner 100 shown in fig. 1, the first air duct 101 of the split type air conditioner can be arranged in an indoor housing in a building, and the second heat exchanger 5 and the first fan 20 can be arranged in the first air duct 101; the second air duct 102 of the split air conditioner may be disposed in an outdoor housing outside the building, and the compressor 1, the first heat exchanger 2, the second fan 30, etc. may be disposed in the second air duct 102. A refrigerant pipeline is arranged between the indoor unit and the outdoor unit and is connected with the compressor 1, the first heat exchanger 2, the throttling device 3 and the second heat exchanger 5 to form a refrigeration cycle loop.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. An air conditioner, comprising:

a compressor provided with a first outlet and a first inlet;

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

3. The air conditioner according to claim 2, wherein the water tank is disposed below the first heat exchanger;

the first heat exchanger is provided with a through groove extending from the bottom to the top, and one side of the water pumping wheel, which is away from the water tank, is accommodated in the through groove.

4. An air conditioner according to claim 2 wherein the cooling tube is connected to the bottom of the first heat exchanger.

5. The air conditioner according to claim 2, further comprising:

the water level sensor is used for detecting the depth of condensed water in the water tank;

6. The air conditioner of claim 5, further comprising a first valve and a second valve;

7. The air conditioner of claim 6, further comprising a second temperature sensor for detecting a temperature of condensed water in the water tank;

8. The air conditioner according to any one of claims 5 to 7, further comprising a third temperature sensor for measuring an air temperature of the outdoor air before heat exchange with the first heat exchanger;

9. The air conditioner of claim 1, further comprising a third heat exchanger;

10. The air conditioner according to any one of claims 1 to 7 and 9, wherein the refrigerant is carbon dioxide.

11. The air conditioner according to any one of claims 1 to 7, further comprising:

the shell is internally provided with a first air duct and a second air duct;