CN110864469A

CN110864469A - Air conditioning equipment

Info

Publication number: CN110864469A
Application number: CN201810982390.5A
Authority: CN
Inventors: 刘和成; 岳宝; 林晨; 大森宏
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2018-08-27
Filing date: 2018-08-27
Publication date: 2020-03-06
Anticipated expiration: 2038-08-27
Also published as: WO2020042459A1; CN110864469B

Abstract

The present invention provides an air conditioning apparatus, comprising: the first heat exchanger is an air-cooled heat exchanger; the phase-change energy-storage heat exchange device comprises a phase-change material and a second heat exchanger, and heat can be exchanged between the second heat exchanger and the phase-change material; the refrigerant pipeline is communicated with the first interface of the first heat exchanger and the third interface of the second heat exchanger; the compressor is a variable frequency compressor; the reversing device is connected with the exhaust port and the return port of the compressor, the second interface of the first heat exchanger and the fourth interface of the second heat exchanger, and is used for communicating the exhaust port with the fourth interface and communicating the return port with the second interface in a refrigeration mode; in the regeneration mode, the return air port is communicated with the fourth port, and the exhaust port is communicated with the second port. The air conditioning equipment provided by the scheme has a short regeneration period, can be freely and flexibly regulated and controlled, overcomes the problems that the regeneration period is long and cannot be controlled when the existing energy storage material is naturally regenerated, can improve the product operation energy efficiency, and realizes energy conservation and emission reduction.

Description

Air conditioning equipment

Technical Field

The invention relates to the field of air conditioners, in particular to an air conditioning device.

Background

The prior art provides a scheme for condensing air conditioning equipment by adopting an energy storage material to exchange heat with a heat exchanger, but in the process of implementing the invention, an inventor finds that the prior art has the following problems: air conditioning equipment refrigeration operation need be to the heat release regeneration of energy storage material after a period, however, the latent heat of energy storage material is big, and natural regeneration is slow, and this directly leads to air conditioning equipment's refrigeration interval cycle length, has reduced user's use and has experienced.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide an air conditioning apparatus.

To achieve the above object, an embodiment of the present invention provides an air conditioning apparatus including: the first heat exchanger is an air-cooled heat exchanger and is provided with a first interface and a second interface for the refrigerant to enter and exit; the phase-change energy-storage heat exchange device comprises a phase-change material and a second heat exchanger, heat exchange can be carried out between the second heat exchanger and the phase-change material, and the second heat exchanger is provided with a third interface and a fourth interface for the refrigerant to enter and exit; the refrigerant pipeline is communicated with the first interface and the third interface; the compressor is a variable frequency compressor and is provided with an exhaust port and a return port; the reversing device is connected with the air outlet, the air return port, the second interface and the fourth interface, wherein in a refrigerating mode, the reversing device enables the air outlet to be communicated with the fourth interface and enables the air return port to be communicated with the second interface; in the regeneration mode, the reversing device enables the air return port to be communicated with the fourth interface and enables the air exhaust port to be communicated with the second interface.

The air conditioning equipment provided by the above embodiment of the invention can control and switch the refrigeration mode and the regeneration mode by using the reversing device, wherein in the regeneration mode, the compressor sucks air from the second heat exchanger and exhausts the air to the first heat exchanger, in the whole refrigerant system loop, the second heat exchanger can directly absorb heat from the phase change material as an evaporator to promote the heat release and regeneration of the phase change material, and because the compressor is a variable frequency compressor, the regeneration rate can be further controlled by adjusting the running frequency of the compressor, the regeneration period can be freely and flexibly regulated, the bad experiences of long regeneration period, inconvenient control and the like existing in the natural regeneration of the energy storage material in the existing product are overcome, in addition, the working efficiency of the refrigerant in each heat release stage of the phase change material regeneration can be controlled by adjusting the running frequency of the compressor to be basically matched with the working efficiency of the refrigerant in the same period and maintain high efficiency, therefore, the heat exchange efficiency between the second heat exchanger and the phase-change material is improved, the heat exchange loss is reduced, the aim of improving the operation energy efficiency of the air conditioning equipment in the regeneration mode is fulfilled while the regeneration period is shortened, and therefore energy conservation and emission reduction of products are achieved.

In addition, the air conditioning equipment in the above embodiment provided by the present invention may further have the following additional technical features:

in the above technical solution, the operation frequency of the compressor in the cooling mode is lower than that in the regeneration mode.

In the scheme, the running frequency of the compressor in the refrigeration mode is set to be lower than that in the regeneration mode, so that in the regeneration mode, the high-frequency running of the compressor is controlled to correspondingly increase the regeneration rate and shorten the regeneration time consumption, in the refrigeration mode, the running period of the refrigeration mode is correspondingly prolonged by reducing the frequency of the compressor, so that the long-time specific gravity of the refrigeration period is increased on the whole shaft, the refrigeration continuity is improved, and the use experience of products is improved, and in addition, because the phase-change material has the characteristics of large latent heat and stable temperature, after the running frequency of the compressor in the refrigeration mode is reduced, the problem of insufficient refrigeration amount is not caused, otherwise, the characteristic of good temperature stability of the phase-change material can be more fully utilized to correspondingly ensure the stability of the indoor refrigeration temperature, and the problems of low indoor refrigeration temperature, hard refrigeration and the like are avoided, the comfort level of the product is improved, and compared with the form that the second heat exchanger adopts air-cooled heat exchange, the characteristic that the temperature of the phase-change material is lower than that of the heat dissipation air can be more fully utilized to increase the work capacity of the phase-change material to the refrigerant by absorbing heat, so that the compression work demand of the compressor to the refrigerant in the mode is correspondingly reduced, the compression operation energy consumption of the air conditioning equipment in the refrigeration mode is reduced, the design is realized, the demand of the compression work capacity of the compressor in the mode can be reduced to zero even when the compressor is in use, the compressor can drive the refrigerant, the effect of reducing the energy consumption is obvious, and the energy saving and emission reduction effects of the product are further improved.

Generally, the air conditioning equipment in this design, phase change material regeneration cycle is shorter, and refrigeration continuity effect is better, and when shortening regeneration cycle, extension refrigeration cycle, can compromise and realize its indoor refrigeration temperature and stabilize and avoid the refrigeration temperature condition of refrigeration temperature low more or less hard for harmonious nature between regeneration mode and the refrigeration mode is better, and the product efficiency is higher, and it is also better to use experience.

In any of the above technical solutions, when the air conditioning device operates in the cooling mode, the compressor operates at a frequency within a preset low frequency range, and when the air conditioning device operates in the regeneration mode, the compressor operates at a frequency within a preset high frequency range.

It will be appreciated that the predetermined low frequency interval has a lower frequency value relative to the predetermined high frequency interval.

In the scheme, when the air-conditioning equipment is set to operate in the refrigeration mode, the compressor operates at the frequency within the preset low-frequency interval, specifically, when the controller of the air-conditioning equipment detects that the current operation mode of the air-conditioning equipment is the refrigeration mode, or when the controller detects an instruction sent by an operation terminal (such as an air-conditioning equipment operation panel, a remote controller, a mobile phone terminal, a computer terminal and the like) and used for controlling the air-conditioning equipment to operate in the refrigeration mode, the controller correspondingly controls the operation frequency of the compressor to float within the preset low-frequency interval, wherein the heat absorption and temperature reduction efficiency of the phase-change material on the second heat exchanger is high and stable, the high-efficiency condensation and the stable condensation temperature of the system can be ensured, so that the operation frequency of the compressor is controlled to float within the range of the preset low-frequency interval, the frequency of the compressor cannot fluctuate greatly along with other factors such as room temperature, and the basic fluctuation of the internal heat The balance is realized, the heat exchange efficiency between the phase change material and the second heat exchanger can be basically stabilized in a high-efficiency state corresponding to the preset low-frequency range, the energy efficiency of the air conditioning equipment is improved, and is beneficial to protecting the phase-change material, avoiding the bad conditions of local overheating and the like caused by the heat conduction efficiency in the phase-change material lagging the heat transfer efficiency between the phase-change material and the second heat exchanger, improving the reliability of the product, and the phase-change material can also drive the second heat exchanger to do work on the condensation of the refrigerant in a heat absorption mode and the compressor to do work on the compression of the refrigerant to achieve good adaptation coordination, if the work amount of the condensation work-doing part is large, the work of the compressor can be correspondingly small, thereby avoiding unnecessary energy waste, being beneficial to the maximization of the resource utilization efficiency, avoiding the refrigeration effect being too hard and extremely hard, having good comfort, therefore, the aim of comprehensively improving the operation energy efficiency of the air conditioning equipment is fulfilled while the comfort level is improved; when the regeneration mode of the air conditioning equipment is set, the compressor runs at the frequency in the preset high-frequency interval, specifically, when the controller of the air conditioning equipment detects that the current running mode of the air conditioning equipment is the regeneration mode, or when the controller detects an instruction for controlling the regeneration mode of the air conditioning equipment from an operation terminal (such as an air conditioning equipment operation panel, a remote controller, a mobile phone terminal, a computer terminal and the like), the controller correspondingly controls the compressor to run at the frequency in the preset low-frequency interval, so that the heat absorption rate of the phase-change material in the refrigeration mode is wholly lower than the regeneration rate of the phase-change material in the regeneration mode, the specific gravity of the refrigeration time is increased, the specific gravity of the regeneration time is reduced, the refrigeration continuity is improved, the product use comfort is improved, the refrigeration mode and the regeneration mode are respectively kept to enable the frequency of high-efficiency running, and the harmonicity between the regeneration mode and the, the product energy efficiency is higher.

In any of the above technical solutions, the reversing device includes a four-way valve.

In this scheme, set up the switching-over device and include the cross valve, simple structure, and can realize effectively switching over between refrigeration mode and the regeneration mode, control is accurate reliable.

In any of the above technical solutions, the phase change temperature of the phase change material is 15 ℃ to 40 ℃, and/or the phase change material is a solid-liquid phase change material or a vapor-liquid phase change material, and/or the air conditioning equipment is a mobile air conditioner.

It is understood that the phase transition temperature is the critical temperature at which the phase change material transitions between different phases, for example, for a solid-liquid phase change material, it is understood that the critical temperature at which the phase change material transitions from a solid phase to a liquid phase (and vice versa), and for a vapor-liquid phase change material, it is understood that the critical temperature at which the phase change material transitions from a liquid phase to a vapor phase (and vice versa).

In the scheme, the phase change temperature of the phase change material is set to be 15-40 ℃, so that the harmonicity between the regeneration mode and the refrigeration mode of the air conditioning equipment can be improved, the air conditioning equipment can run at higher efficiency in the regeneration mode and the refrigeration mode, the comprehensive operation energy efficiency of the whole machine is improved, and the energy conservation and emission reduction of products are promoted.

The air conditioning equipment is set as a mobile air conditioner, it can be understood that in the traditional mobile air conditioner, the second heat exchanger adopts air-cooled heat exchange and utilizes a thick connecting pipe to discharge hot air to a position far away from the mobile air conditioner, the mobility of the mobile air conditioner is reduced due to the arrangement of the thick connecting pipe, and the use experience is influenced, while in the scheme, the second heat exchanger adopts phase-change material to absorb heat and condense, thereby a thick connecting pipeline which radiates heat outwards is eliminated, the use of the mobile air conditioner can be more convenient and flexible, and the heat released by the second heat exchanger of the mobile air conditioner can not be transferred to the indoor when the mobile air conditioner refrigerates indoors, the refrigeration use experience is good, in addition, when the phase-change material is regenerated, the mobile air conditioner can be flexibly transferred to the outdoor or other places which can not influence the user experience, so that the mobile air conditioner operates in a regeneration mode, and the regeneration period can be greatly shortened, the product which can quickly finish regeneration can be used for refrigerating again indoors after the refrigeration is temporarily stopped, the indoor refrigeration environment is continuous, and the use experience of the product is improved.

In any one of the above technical solutions, the refrigerant pipeline includes: and the first one-way throttling branch is communicated with the first interface and the third interface and is used for throttling the refrigerant from the second heat exchanger and then conveying the refrigerant to the first heat exchanger.

In this scheme, set up first one-way throttle branch road and be used for carrying to first heat exchanger after the refrigerant throttle from the second heat exchanger, can promote the evaporation efficiency of first heat exchanger department through throttling the refrigerant to can promote refrigeration efficiency, ensure to satisfy user refrigeration efficiency demand.

In the above technical solution, the refrigerant pipeline further includes: and the second one-way throttling branch is communicated with the first interface and the third interface and is used for throttling the refrigerant from the first heat exchanger and then conveying the refrigerant to the second heat exchanger.

In this scheme, set up the one-way throttle branch road of second and can be defeated toward the second heat exchanger after the refrigerant throttle from first heat exchanger, like this, phase change material appears the heat absorption saturation or is close the heat absorption saturation after air conditioning equipment refrigeration operation a period and need make phase change material regenerate again in order to resume the heat absorption capacity when, utilize the one-way throttle branch road of second to send to the second heat exchanger after the refrigerant throttle, can promote the evaporation efficiency of second heat exchanger department, promote the regeneration efficiency to phase change material, realize shortening regeneration period's purpose.

In the above technical scheme, the pressure drop of the refrigerant throttled by the first one-way throttling branch is smaller than the pressure drop throttled by the second one-way throttling branch.

In the scheme, the throttling pressure drop of the first one-way throttling branch which plays a throttling role in the refrigeration mode is designed to be smaller than the throttling pressure drop of the second one-way throttling branch which plays a throttling role in the regeneration mode, so that deep throttling does not occur in the refrigeration mode, namely, compared with the second one-way throttling branch, deep throttling does not occur on the first one-way throttling branch, the effect of maintaining indoor ideal evaporation temperature is better, no harsh refrigeration effect is generated, cold air is softer and more comfortable, the condensation load at the second heat exchanger in the refrigeration mode can be reduced, the selectable range of the phase-change material is correspondingly wider, meanwhile, the heat exchange efficiency between the phase-change material and the second heat exchanger is higher, and the utilization rate of cold energy of the phase-change material is also higher, so that the energy loss of the whole air conditioning equipment is reduced, the operation efficiency is higher, and in the regeneration mode, the throttling depth of the second one-way throttling branch is large, so that the regeneration process of the phase-change material is accelerated, the regeneration period is shortened, the energy loss in the regeneration process can be reduced, the lower cold accumulation temperature of the phase-change material can be realized, the condensation requirement of the second heat exchanger under the refrigeration working condition can be met, on the whole, the difference exists between the cold release period and the regeneration period of the phase-change material through the design, the air conditioning equipment can be comprehensively promoted to be pushed towards the energy efficiency promotion direction, and the energy efficiency promotion of the air conditioning equipment is facilitated.

In any of the above technical solutions, the refrigerant pipeline further includes: and the communication branch is communicated with the first interface and the third interface, and the first interface and the third interface are communicated when the communication branch is communicated.

In the scheme, a communicating branch is arranged and is used for communicating a first interface with a third interface in a conducting state, under the refrigeration mode of the air conditioning equipment, when the temperature of the refrigerant at the third interface of a second heat exchanger is detected to be lower than the room temperature and has a certain temperature difference, the refrigerant discharged from the third interface can be directly discharged into the first heat exchanger through the first interface by using the communicating branch for evaporation, and the refrigerant does not need to be throttled before entering the first heat exchanger, so that the refrigerant does not generate a harsh refrigeration effect when being evaporated in the first heat exchanger, the cold air is softer and more comfortable, particularly, under the condition that the indoor temperature does not need to be rapidly reduced or the requirement on the refrigeration degree is not too high, the refrigeration comfort degree can be improved, the condensation load at the second heat exchanger in the mode is small, and the characteristics that the temperature of a phase-change material can be kept stable in a phase-change temperature interval can be fully utilized to improve the stability of the, the method is favorable for maintaining comfortable room temperature, has higher utilization rate of cold energy of the phase-change material, and is favorable for ensuring the high efficiency of the operation of the air conditioning equipment.

In any of the above technical solutions, the phase change energy storage and heat exchange device has a container, and the phase change material is accommodated in the container, wherein the second heat exchanger is connected to the container through a detachable connection structure, so that the second heat exchanger can be assembled to or disassembled from the container.

In the scheme, the container piece for containing the phase change material is detachably connected with the second heat exchanger through the detachable connecting structure, so that the phase change material can be regenerated by the product in a regeneration mode, the container piece can be detached from the second heat exchanger and placed at a position suitable for regeneration of the container piece (for example, in a refrigerator or in a cool environment, and the like), the phase change material in the container piece is promoted to be naturally regenerated by utilizing the environment, and even, the container piece can be replaced by a new container piece after being detached or the phase change material in the container piece is replaced to realize replacement regeneration, so that the aim of sustainable refrigeration is fulfilled.

More specifically, after the phase-change material is filled with heat and becomes a liquid phase, the container member can be detached, the liquid phase-change material in the container member is led out and is replaced by the solid phase-change material, and therefore the air conditioning equipment can be operated in the refrigeration mode again. When the user does not need to use the air conditioning equipment immediately, the container part containing the liquid phase-change material can be placed in a better ventilated environment for naturally radiating heat and cooling the phase-change material, so that the phase-change material is converted from a liquid phase to a solid phase for regeneration and the like, and the energy consumption is lower.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an air conditioning apparatus according to an embodiment of the present invention in a cooling mode;

FIG. 2 is a schematic diagram of an air conditioning apparatus according to an embodiment of the present invention in a regeneration mode;

fig. 3 is an exploded schematic view of a phase change energy storage device according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

110 first heat exchanger, 111 first interface, 112 second interface, 120 second heat exchanger, 121 third interface, 122 fourth interface, 130 container part, 131 shell cavity, 132 plug channel, 140 fan, 150 compressor, 151 exhaust port, 152 return port, 160 reversing device, 171 first capillary tube, 172 first check valve, 173 second capillary tube, 174 second check valve.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The air conditioning apparatus according to some embodiments of the present invention will be described below with reference to fig. 1 to 3.

As shown in fig. 1 and 2, an embodiment of the present invention provides an air conditioning apparatus including: the heat exchanger comprises a first heat exchanger 110, a phase change energy storage and heat exchange device, a refrigerant pipeline, a compressor 150 and a reversing device 160.

Specifically, the first heat exchanger 110 is an air-cooled heat exchanger, and has a first interface 111 and a second interface 112 for the refrigerant to enter and exit; the phase-change energy-storage heat exchange device comprises a phase-change material and a second heat exchanger 120, heat exchange can be carried out between the second heat exchanger 120 and the phase-change material, and the second heat exchanger 120 is provided with a third interface 121 and a fourth interface 122 for refrigerant to enter and exit; the refrigerant pipeline is communicated with the first interface 111 and the third interface 121; the compressor 150 is a variable frequency compressor and has a discharge port 151 and a return port 152; the reversing device 160 is connected to the air outlet 151, the air return opening 152, the second interface 112 and the fourth interface 122, wherein in the cooling mode, the reversing device 160 enables the air outlet 151 to be communicated with the fourth interface 122 and enables the air return opening 152 to be communicated with the second interface 112; in the regeneration mode, the reversing device 160 communicates the return air port 152 with the fourth port 122 and communicates the exhaust port 151 with the second port 112.

The air conditioning equipment provided by the above embodiment of the present invention utilizes the reversing device 160 to control and switch the refrigeration mode and the regeneration mode, wherein in the regeneration mode, the compressor 150 sucks air from the second heat exchanger 120 and exhausts the air to the first heat exchanger 110, in the whole refrigerant system loop, the second heat exchanger 120 as an evaporator can directly absorb heat from the phase change material to promote the heat release and regeneration of the phase change material, and because the compressor 150 is a variable frequency compressor, the regeneration rate can be further controlled by adjusting the operating frequency of the compressor 150, the regeneration period can be freely and flexibly regulated, the bad experiences of long regeneration period and inconvenient control and the like existing in the natural regeneration of the energy storage material in the existing product are overcome, and in the design, the working efficiency of the phase change material in each heat release stage of the regeneration of the phase change material can be basically matched with the working efficiency of the refrigerant 150 in the same period and can be maintained at high efficiency by adjusting the operating frequency, therefore, the heat exchange efficiency between the second heat exchanger 120 and the phase-change material is improved, the heat exchange loss is reduced, the aim of improving the operation energy efficiency of the air conditioning equipment in the regeneration mode is fulfilled while the regeneration period is shortened, and therefore energy conservation and emission reduction of products are achieved.

More specifically, the phase-change material has small temperature fluctuation in the phase-change region, the phase-change material is added into the phase-change energy-storage heat exchange device to keep the stability of the evaporation temperature and the condensation temperature, and meanwhile, the control of the operation of the air conditioning equipment at the ideal evaporation temperature and condensation temperature is facilitated, the similar Carnot cycle is realized, and the refrigeration efficiency of the air conditioning equipment is improved. The application of the phase-change material in the cold accumulation of the air-conditioning system has related researches, such as ice cold accumulation, but the refrigeration system of the air-conditioning equipment has low efficiency due to low evaporation temperature (lower than 0 ℃ of the freezing point of water) required by the ice cold accumulation, but on the other hand, the phase-change material which is higher than the ice point and is suitable for the refrigeration system (the phase-change temperature is between 5 and 50 ℃) has energy storage density far lower than the cold accumulation density (about 330kJ/L) of the ice, such as the application in the refrigeration system with the cold quantity larger than 1kW, the volume is larger, and the compactness of the product. In the invention, ice is preferably adopted as the phase-change material, so that the purposes of improving the phase-change heat exchange capacity and saving the volume are achieved, of course, the method is only a preferable scheme of the design, and the type of the phase-change material can be correspondingly adjusted by a person skilled in the art according to the requirement.

Preferably, the operation frequency of the compressor 150 in the refrigeration mode is lower than that in the regeneration mode, so that in the regeneration mode, the compressor 150 is controlled to operate at a high frequency to correspondingly increase the regeneration rate and shorten the regeneration time consumption, and in the refrigeration mode, the operation cycle of the refrigeration mode is correspondingly prolonged by reducing the frequency of the compressor 150, so as to increase the long-term specific gravity of the refrigeration cycle on the whole shaft and improve the refrigeration continuity, thereby improving the use experience of the product, and in addition, since the phase-change material has the characteristics of large latent heat and stable temperature, after the operation frequency of the compressor 150 in the refrigeration mode is reduced, not only the problem of insufficient refrigeration capacity is not caused, but also the characteristic of good temperature stability of the phase-change material can be more fully utilized to correspondingly ensure the indoor refrigeration temperature stability, and the problems of low indoor refrigeration temperature, hard refrigeration and the like are avoided, the comfort level of the product is improved, and compared with the form that the air cooling heat exchange is adopted at the position of the second heat exchanger 120, the characteristic that the temperature of the phase change material is lower than that of the heat dissipation air can be fully utilized to increase the work capacity of the phase change material for absorbing heat to the refrigerant, so that the compression work demand of the compressor 150 to the refrigerant in the mode is correspondingly reduced, the compression operation energy consumption of the air conditioning equipment in the refrigeration mode is reduced, the design is well carried out, even the demand of the compression work capacity of the compressor 150 in the mode can be reduced to zero, the compressor 150 can drive the refrigerant, the effect of reducing the energy consumption is obvious, and the energy saving and emission reduction effects of the product are further improved.

Further, when the air conditioning apparatus operates in the cooling mode, the compressor 150 operates at a frequency within a preset low frequency range, and when the air conditioning apparatus operates in the regeneration mode, the compressor 150 operates at a frequency within a preset high frequency range.

In this embodiment, when the air conditioner is set to operate in the cooling mode, the compressor 150 operates at a frequency within a preset low frequency range, specifically, when a controller (such as a microprocessor, a central module, etc.) of the air conditioner detects that the current operation mode of the air conditioner is the cooling mode, or when the controller detects an instruction for controlling the cooling mode of the air conditioner from an operation terminal (such as an operation panel of the air conditioner, a remote controller, a mobile phone terminal, a computer terminal, etc.) and the like, the controller correspondingly controls the operation frequency of the compressor 150 to float within the preset low frequency range, wherein, since the phase change material has high and stable heat absorption and temperature reduction efficiency for the second heat exchanger 120, the system can be guaranteed to have high condensation efficiency and stable condensation temperature, so that the operation frequency of the compressor 150 is controlled to float within the preset low frequency range, and the frequency of the compressor 150 does not fluctuate greatly with other factors such as room temperature, this is beneficial to maintaining the heat conduction efficiency inside the phase change material and the heat absorption efficiency of the phase change material to the second heat exchanger 120 to be substantially balanced, so that the heat exchange efficiency between the phase change material and the second heat exchanger 120 can be substantially stabilized in a high-efficiency state corresponding to the preset low frequency range, thereby improving the energy efficiency of the air conditioning equipment, protecting the phase change material, avoiding the adverse conditions of local overheating and the like caused by the heat conduction efficiency of the phase change material lagging behind the heat transfer efficiency between the phase change material and the second heat exchanger 120, improving the reliability of the product, and also enabling the heat absorption mode of the phase change material to drive the second heat exchanger 120 to do work for the condensation of the refrigerant and the compressor 150 to achieve good adaptation coordination for the compression of the refrigerant, if the work amount of the condensation work portion is large, the work of the compressor 150 can be correspondingly small, thereby avoiding unnecessary energy waste, being beneficial to the maximization of the, the comfort is good, so that the aim of comprehensively improving the operation energy efficiency of the air conditioning equipment is fulfilled while the comfort is improved; when the regeneration mode of the air conditioning equipment is set, the compressor 150 operates at the frequency within the preset high-frequency interval, specifically, for example, when the controller of the air conditioning equipment detects that the current operation mode of the air conditioning equipment is the regeneration mode, or when the controller detects an instruction for controlling the regeneration mode of the air conditioning equipment from an operation terminal (such as an operation panel of the air conditioning equipment, a remote controller, a mobile phone terminal, a computer terminal and the like), the controller correspondingly controls the compressor 150 to operate at the frequency within the preset low-frequency interval, so that the overall heat absorption rate of the phase-change material in the refrigeration mode is lower than the regeneration rate of the phase-change material in the regeneration mode, the specific gravity of the refrigeration time is increased, the specific gravity of the regeneration time is reduced, the refrigeration continuity is improved, the product use comfort is improved, and the refrigeration mode and the regeneration mode are respectively kept at, the harmonicity between the regeneration mode and the refrigeration mode is better, and the product energy efficiency is higher.

Preferably, the reversing device 160 comprises a four-way valve, and more specifically, the four-way valve is communicated with the air outlet 151, the air return opening 152, the second interface 112 and the fourth interface 122, wherein when the air conditioning equipment runs in the cooling mode, the interior of the four-way valve switches to control the air outlet 151 to be communicated with the fourth interface 122, and control the air return opening 152 to be communicated with the second interface 112; when the air conditioner operates in the regeneration mode, the four-way valve switches the air return port 152 to be communicated with the fourth interface 122 and controls the air exhaust port 151 to be communicated with the second interface 112.

In any of the above embodiments, when ice is not used as the phase change material, the phase change material preferably adopts a phase change material with a phase change temperature of 15-40 ℃, and a person skilled in the art can specifically select from the existing phase change materials which meet the requirement of a phase change temperature of 15-40 ℃, and the specific selection is not listed here, wherein the phase change temperature of the phase change material is set to 15-40 ℃, so that the harmonicity between the regeneration mode and the refrigeration mode of the equipment can be improved, the air conditioning equipment can run at a higher efficiency in both the regeneration mode and the refrigeration mode, the comprehensive operation energy efficiency of the whole machine is improved, and the energy conservation and emission reduction of the product are facilitated. More preferably, the phase transition temperature of the phase change material is 17 ℃ to 30 ℃, and even more preferably, the phase transition temperature of the phase change material is 20 ℃ to 25 ℃.

In any of the above embodiments, optionally, the phase change material is a solid-liquid phase change material or a vapor-liquid phase change material.

In any of the above embodiments, preferably, the air conditioning equipment is a mobile air conditioner, it can be understood that, in the conventional mobile air conditioner, the air-cooled heat exchange is adopted at the second heat exchanger 120, and the thick connecting pipe is utilized to discharge hot air to a position far away from the mobile air conditioner, the arrangement of the thick connecting pipe can cause the mobility of the mobile air conditioner to be reduced, and the use experience is affected, while in the present scheme, the phase-change material is adopted at the second heat exchanger 120 to absorb heat and condense, so that a thick connecting pipeline for dissipating heat outwards is omitted, the use of the mobile air conditioner can be more convenient and flexible, and the heat released by the second heat exchanger 120 of the mobile air conditioner can not be transferred indoors when the mobile air conditioner refrigerates indoors, and the refrigeration use experience is good, in addition, when the phase-change material is regenerated, the mobile air conditioner can be flexibly transferred outdoors or other places which can not affect the user experience, so that the mobile air conditioner operates in a regeneration, the product which can quickly finish regeneration can be used for refrigerating again indoors after the refrigeration is temporarily stopped, the indoor refrigeration environment is continuous, and the use experience of the product is improved.

In any of the above embodiments, as shown in fig. 1, the refrigerant pipeline includes a first one-way throttling branch, and the first one-way throttling branch is communicated with the first interface 111 and the third interface 121, and is used for throttling the refrigerant from the second heat exchanger 120 and then delivering the refrigerant to the first heat exchanger 110, wherein evaporation efficiency at the first heat exchanger 110 can be improved by throttling the refrigerant, so that refrigeration efficiency can be improved, and the requirement of refrigeration efficiency of a user can be met.

Further, as shown in fig. 2, the refrigerant pipeline further includes a second unidirectional throttling branch, the second unidirectional throttling branch is communicated with the first interface 111 and the third interface 121, and is used for throttling the refrigerant from the first heat exchanger 110 and then conveying the refrigerant to the second heat exchanger 120, so that when the phase change material is required to be regenerated again to recover the heat absorption capacity due to heat absorption saturation or close to the heat absorption saturation after the air conditioning equipment is operated for a period of time, the refrigerant is throttled by the second unidirectional throttling branch and then conveyed to the second heat exchanger 120, the evaporation efficiency at the second heat exchanger 120 can be improved, the regeneration efficiency of the phase change material is improved, and the purpose of shortening the regeneration period is achieved.

Preferably, the pressure drop of the refrigerant throttled by the first one-way throttling branch is smaller than the pressure drop throttled by the second one-way throttling branch, and more specifically, the length of a capillary tube playing a throttling role in the first one-way throttling branch is controlled to be shorter than that of a capillary tube playing a throttling role in the second one-way throttling branch, or for example, the opening degree of a throttle valve playing a throttling role in the first one-way throttling branch is controlled to be larger than that of a throttle valve playing a throttling role in the second one-way throttling branch.

In the scheme, the throttling pressure drop of the first one-way throttling branch which plays a throttling role in the refrigeration mode is designed to be smaller than the throttling pressure drop of the second one-way throttling branch which plays a throttling role in the regeneration mode, so that deep throttling does not occur in the refrigeration mode, namely, compared with the second one-way throttling branch, deep throttling does not occur on the first one-way throttling branch, the effect of maintaining the indoor ideal evaporation temperature is better, no harsh refrigeration effect is generated, cold air is softer and more comfortable, the condensation load at the second heat exchanger 120 in the refrigeration mode can be reduced, the selectable range of the phase-change material is correspondingly wider, meanwhile, the heat exchange efficiency between the phase-change material and the second heat exchanger 120 is higher, the utilization rate of cold energy of the phase-change material is also higher, thus, the energy loss of the whole air conditioning equipment is reduced, the operation energy efficiency is higher, and in the regeneration mode, the throttling depth of the second one-way throttling branch is large, so that the regeneration process of the phase-change material is accelerated, the regeneration period is shortened, the energy loss in the regeneration process can be reduced, the lower cold accumulation temperature of the phase-change material can be realized, the condensation requirement of the second heat exchanger 120 under the refrigeration working condition can be met, generally speaking, the cold release and regeneration periods of the phase-change material are different through the design, the air conditioning equipment can be comprehensively promoted to be pushed towards the energy efficiency promotion direction, and the energy efficiency promotion of the air conditioning equipment is facilitated.

In any of the above embodiments, the refrigerant pipeline further includes a communication branch (not shown), specifically, the communication branch is communicated with the first port 111 and the third port 121, and when the communication branch is conducted, the first port 111 is communicated with the third port 121, more specifically, the communication branch and the first unidirectional throttling branch form a parallel connection.

Wherein, in the refrigeration mode of the air conditioning equipment, when the temperature of the refrigerant at the third interface 121 of the second heat exchanger 120 is lower than the room temperature and has a certain temperature difference, the refrigerant discharged from the third interface 121 can be directly discharged into the first heat exchanger 110 through the first interface 111 by using the communication branch for evaporation, and the refrigerant does not need to be throttled before entering the first heat exchanger 110, so that the refrigerant does not generate a harsh refrigeration effect during the evaporation process in the first heat exchanger 110, the cold air is softer and more comfortable, especially under the condition that the indoor temperature is not required to be rapidly reduced or the requirement on the refrigeration degree is not too high, the refrigeration comfort level can be improved, and the condensation load at the second heat exchanger 120 in such a mode is small, so that the stability of the evaporation temperature and the condensation temperature can be improved by fully utilizing the characteristic that the temperature of the phase-change material can be kept stable in the phase-change temperature interval, and the room temperature can, and the utilization rate of the cold energy of the phase-change material is higher, and the high efficiency of the operation of the air conditioning equipment is ensured.

Specifically, the communication branch includes a refrigerant pipe connecting the first port 111 and the third port 121, and the refrigerant pipe is provided with a valve for controlling the refrigerant pipe to be turned on or off.

In any of the above embodiments, as shown in fig. 3, the phase-change energy-storage heat exchange apparatus has a container member 130, and the phase-change material is contained in the container member 130, wherein the second heat exchanger 120 is connected to the container member 130 through a detachable connection structure, so that the second heat exchanger 120 can be assembled with or disassembled from the container member 130. In this way, in addition to the phase change material regeneration by the regeneration mode, the container 130 can be detached from the second heat exchanger 120 and placed at a position suitable for the regeneration (e.g., in a refrigerator or in a cool environment), so as to promote the natural regeneration of the phase change material in the container 130 by using the environment, and even the replacement regeneration can be realized by replacing the phase change material in the container 130 with a new one after detachment or replacing the phase change material in the container 130, thereby achieving the purpose of sustainable refrigeration.

Specifically, for example, after the phase-change material is filled with heat and becomes a liquid phase, the container member 130 may be detached, and the liquid phase-change material in the container member 130 may be led out and replaced with a solid phase-change material, so that the air conditioning apparatus may be operated in the cooling mode again. When the user does not need to use the air conditioning equipment immediately, the container part 130 containing the liquid phase-change material can be placed in a better ventilated environment for natural heat dissipation, and the phase-change material is cooled, so that the phase-change material is converted from a liquid phase to a solid phase for regeneration and the like, and the energy consumption is lower.

For example, as shown in fig. 3, the container member 130 includes a shell cavity 131 and a phase change material filled in the shell cavity 131, wherein the detachable connection structure includes an insertion channel 132 formed on the shell cavity 131, and the second heat exchanger 120 includes a heat exchange pipe which can be inserted into the insertion channel 132 and can exit the insertion channel 132 to achieve the loading and unloading between the second heat exchanger 120 and the container member 130. Wherein, be equipped with grafting passageway 132 on shell chamber 131 and make shell chamber 131 and the heat exchange tube of second heat exchanger 120 form the removable assembly of grafting form, have simple structure, processing convenience, and the dismouting uses simple and convenient advantage, and the form of heat exchange tube and grafting passageway 132 grafting in this structure can do benefit to the effective corresponding area of promotion heat exchange tube and phase change material in shell chamber 131, promotes the radiating efficiency to the heat exchange tube.

Detailed description of the preferred embodiments example 1 (shown in FIGS. 1 and 2)

The air conditioning equipment is a mobile air conditioner, and specifically comprises a first heat exchanger 110, a second heat exchanger 120, a phase change material, a fan 140, a compressor 150, a reversing device 160 and the like.

The first heat exchanger 110 is an air-cooled heat exchanger, and the fan 140 is used for driving the airflow to exchange heat with the first heat exchanger 110.

The phase change material is disposed on the surface of the second heat exchanger 120 and can exchange heat with the second heat exchanger 120.

The first heat exchanger 110 has two interfaces for refrigerant circulation, which are a first interface 111 and a second interface 112, respectively, one of the first interface 111 and the second interface 112 is a refrigerant inlet through which refrigerant enters the first heat exchanger 110, and the other is a refrigerant outlet through which refrigerant is discharged, although the definition of the refrigerant inlet and the refrigerant outlet is not absolute, the first interface 111 and the second interface 112, and the refrigerant inlet and the refrigerant outlet need to be distinguished according to the refrigeration and regeneration conditions, and exchange understanding is performed when the refrigeration and regeneration conditions are switched, the second heat exchanger 120 has two interfaces for refrigerant circulation, which are a third interface 121 and a fourth interface 122, respectively, and the third interface 121 and the fourth interface 122 can be understood similarly to the first interface 111 and the second interface 112.

The compressor 150 is a variable frequency compressor, that is, a compressor with adjustable operation frequency, as will be understood by those skilled in the art, the compressor 150 has an exhaust port 151 and a return port 152, the reversing device 160 is a four-way valve, the four-way valve includes four interfaces, two interfaces of the four-way valve are correspondingly connected to the return port 152 and the exhaust port 151 of the compressor 150, and the other two interfaces of the four-way valve are correspondingly connected to the fourth interface 122 of the second heat exchanger 120 and the second interface 112 of the first heat exchanger 110, as shown in fig. 1, when the air conditioner operates in a cooling mode, the four-way valve controls the conduction between the exhaust port 151 and the fourth interface 122 of the second heat exchanger 120, and controls the conduction between the return port 152 and the second interface 112 of the first heat exchanger 110, as shown in fig. 2, when the air conditioner operates in a regeneration mode, the four-way valve, and controls the conduction between the exhaust port 151 and the second port 112 of the first heat exchanger 110.

In addition, the first port 111 of the first heat exchanger 110 and the third port 121 of the second heat exchanger 120 are connected by a refrigerant pipeline, specifically, the refrigerant pipeline includes a first one-way throttling branch and a second one-way throttling branch, wherein the first one-way throttling branch is communicated with the first port 111 and the third port 121, the refrigerant pipeline includes a first one-way valve 172 for realizing one-way conduction and reverse cut-off from the third port 121 of the second heat exchanger 120 to the first port 111 of the first heat exchanger 110 and a first capillary tube 171 for playing a throttling function, the second one-way throttling branch is communicated with the first port 111 and the third port 121, the refrigerant pipeline includes a second one-way valve 174 for realizing one-way conduction and reverse cut-off from the first port 111 of the first heat exchanger 110 to the third port 121 of the second heat exchanger 120 and a second capillary tube 173 for playing a throttling function, the length of the first capillary tube 171 is shorter than that of the second capillary tube 173, the pressure drop of the refrigerant throttled by the first one-way throttling branch is smaller than that of the refrigerant throttled by the second one-way throttling branch, so that the refrigeration mode and the regeneration mode can operate at the optimal evaporation temperature and the optimal condensation temperature, and the circulation efficiency is improved.

As shown in fig. 1, when the air conditioning equipment operates in a cooling mode, the air conditioning equipment moves to an indoor environment requiring cooling, at this time, an electromagnetic coil of the four-way valve is in a power-off state, as shown in fig. 1, an exhaust port 151 of the compressor 150 is communicated with the second heat exchanger 120, a return port 152 of the compressor 150 is communicated with the first heat exchanger 110, at this time, the second heat exchanger 120 is a condenser of the system, the first heat exchanger 110 is a system evaporator, a refrigerant absorbs indoor heat through the first heat exchanger 110 to achieve a cooling effect, the refrigerant in the first heat exchanger 110 passes through the four-way valve, enters the compressor 150 along the return port 152 of the compressor 150, is compressed in the compressor 150, and enters the second heat exchanger 120 through the four-way valve, wherein heat emitted by the second heat exchanger 120 is absorbed by a phase change material, and since a temperature change of the phase change material in a phase change region is small, meanwhile, the phase-change material changes from a solid state to a liquid state when absorbing heat to a certain degree. After the second heat exchanger 120, the refrigerant flows through the first capillary tube 171 and the first check valve 172, and enters the first heat exchanger 110 again after being throttled, thereby forming a closed-circuit heat storage refrigeration cycle. The compressor 150 operates at a lower frequency in the refrigeration mode, but the frequency can be adjusted within a preset low-frequency interval, so that a user can select different refrigeration powers, it can be understood that the preset low-frequency interval is relative to the preset high-frequency interval, and the value within the preset low-frequency interval is lower than the value within the preset high-frequency interval, and is set in a specific value range.

As shown in fig. 2, when the air conditioner is in the regeneration mode, the air conditioner moves to the outdoor environment, and the solenoid coil of the four-way valve is in the energized state, as shown in fig. 2, the exhaust port 151 of the compressor 150 is communicated with the first heat exchanger 110, and the return port 152 of the compressor 150 is communicated with the second heat exchanger 120, and at this time, the second heat exchanger 120 is a condenser of the system, and the first heat exchanger 110 is a system evaporator. The refrigerant absorbs the heat stored by the phase change material through the second heat exchanger 120, so that the phase change material is changed from a liquid state to a solid state, namely, heat release and heat storage can be performed again, the phase change material is regenerated, then, the refrigerant in the second heat exchanger 120 enters the compressor 150 through the four-way valve along the air return port 152 of the compressor 150, is compressed in the compressor 150 and then enters the first heat exchanger 110 through the four-way valve, in the first heat exchanger 110, the refrigerant exchanges heat with air through the first heat exchanger 110 to reduce the temperature, then flows through the second capillary tube 173 and the second one-way valve 174, and enters the second heat exchanger 120 again after throttling, so that a closed heat release and regeneration cycle is formed. In the regeneration mode, the compressor 150 and the fan 140 operate at a higher frequency so as to quickly conduct the heat stored in the phase change material to the outdoor environment, specifically, if the compressor 150 operates at a frequency within a preset high frequency range, the fan 140 operates at a frequency higher than that in the refrigeration mode, thereby increasing the heat release regeneration speed of the phase change material.

In the scheme, the stability of the evaporation temperature and the condensation temperature is controlled by using the characteristic that the temperature fluctuation of the phase-change material in the phase-change area is small, so that approximate clamping circulation is realized, the efficiency of the system is improved, in addition, in order to ensure that the system operates at higher efficiency in two modes, the phase-change temperature of the used phase-change material is preferably between 15 ℃ and 40 ℃, the phase change can be solid-liquid or vapor-liquid phase-change material, the used capillary tube can also be replaced by an electronic expansion valve, and the electronic expansion valve adjusts the optimal throttling depth in the two modes by adjusting the opening degree.

Detailed description of the preferred embodiments 2 (shown in FIG. 3)

In addition to the features of embodiment 1, it is further provided that the container body for containing the phase change material is connected to the second heat exchanger 120 by a detachable connection structure, so that the second heat exchanger 120 and the container member 130 can be assembled or disassembled.

More specifically, as shown in fig. 3, the second heat exchanger 120 may be an inclined tube heat exchanger (more preferably, an inclined tube without fins), and the heat exchange tube thereof is preferably integrally processed, so as to facilitate the assembly and separation of the container body containing the phase change material and the inclined tube heat exchanger, and not to easily cause refrigerant leakage, and when the phase change material is fully charged with heat and the cooling effect is lower than the cooling requirement for the phase change material, the liquid phase change material in the shell cavity 131 of the container body may be led out, and changed into the solid phase change material to be filled into the shell cavity 131, so that the air conditioning equipment may continue to operate in a cooling mode, and when the user does not need to immediately use the air conditioning equipment, the detached shell cavity 131 containing the liquid phase change material may also be placed in a well ventilated environment, and the shell cavity 131 and the phase change material therein naturally dissipate heat, so as to cool the phase change material from the liquid phase to the solid phase, and realizing regeneration of the phase-change material.

In the present invention, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning apparatus, characterized by comprising:

the first heat exchanger is an air-cooled heat exchanger and is provided with a first interface and a second interface for the refrigerant to enter and exit;

the phase-change energy-storage heat exchange device comprises a phase-change material and a second heat exchanger, heat exchange can be carried out between the second heat exchanger and the phase-change material, and the second heat exchanger is provided with a third interface and a fourth interface for the refrigerant to enter and exit;

the refrigerant pipeline is communicated with the first interface and the third interface;

the compressor is a variable frequency compressor and is provided with an exhaust port and a return port;

a reversing device connected with the exhaust port, the return air port, the second interface and the fourth interface, wherein,

in a cooling mode, the reversing device enables the exhaust port to be communicated with the fourth interface and enables the return air port to be communicated with the second interface;

in the regeneration mode, the reversing device enables the air return port to be communicated with the fourth interface and enables the air exhaust port to be communicated with the second interface.

2. Air conditioning apparatus according to claim 1,

the compressor is operated at a lower frequency in the cooling mode than in the regeneration mode.

3. Air conditioning apparatus according to claim 1 or 2,

when the air conditioning equipment operates in the refrigeration mode, the compressor operates at a frequency within a preset low-frequency interval, and when the air conditioning equipment operates in the regeneration mode, the compressor operates at a frequency within a preset high-frequency interval.

4. Air conditioning apparatus according to claim 1 or 2,

the reversing device comprises a four-way valve.

5. Air conditioning apparatus according to claim 1 or 2,

the phase change temperature of the phase change material is 15-40 ℃, and/or

The phase change material is a solid-liquid phase change material or a vapor-liquid phase change material, and/or

The air conditioning equipment is a mobile air conditioner.

6. The air conditioning apparatus as claimed in claim 1 or 2, wherein the refrigerant line comprises:

and the first one-way throttling branch is communicated with the first interface and the third interface and is used for throttling the refrigerant from the second heat exchanger and then conveying the refrigerant to the first heat exchanger.

7. The air conditioning apparatus as claimed in claim 6, wherein the refrigerant pipeline further comprises:

and the second one-way throttling branch is communicated with the first interface and the third interface and is used for throttling the refrigerant from the first heat exchanger and then conveying the refrigerant to the second heat exchanger.

8. Air conditioning apparatus according to claim 7,

the pressure drop of the refrigerant throttled by the first one-way throttling branch is smaller than that of the refrigerant throttled by the second one-way throttling branch.

9. The air conditioning apparatus as claimed in claim 1 or 2, wherein the refrigerant line further comprises:

and the communication branch is communicated with the first interface and the third interface, and the first interface and the third interface are communicated when the communication branch is communicated.

10. Air conditioning apparatus according to claim 1 or 2,

the phase change energy storage heat exchange device is provided with a container piece, the phase change material is contained in the container piece, the second heat exchanger is connected with the container piece through a detachable connecting structure, and the second heat exchanger and the container piece can be assembled or disassembled.