Air conditioner heat recovery system, air conditioning system having same, and air conditioning control method

Abstract

The application provides an air conditioner heat recovery system, an air conditioner system with the same and an air conditioner control method, wherein the air conditioner heat recovery system comprises: a liquid storage tank with a first storage cavity for containing a heat exchange working medium; a pumping component; a first heat exchanger which is arranged correspondingly to an indoor heat exchanger of an air conditioner system and is located at an air outlet side of the indoor heat exchanger; and a second heat exchanger which is arranged correspondingly to a compressor of the air conditioner system and can at least partially absorb waste heat generated by the compressor in operation; and the heat exchange working medium can circulate between the first heat exchanger, the second heat exchanger and the liquid storage tank under the driving action of the pumping component. The application can reduce the energy consumption of the air conditioner system in the heating mode, improve the operation energy efficiency, reheat and warm the airflow after condensation and dehumidification, improve the use experience of users, realize the recycling of the waste heat of the compressor in operation, and save energy and protect the environment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioning, and particularly relates to an air conditioner heat recovery system, an air conditioner system having the same, and an air conditioner control method. BACKGROUND

[0002] Traditional household heat pump air conditioners have problems such as short low-temperature heating operation period, large indoor temperature fluctuation during defrosting, and the like, which brings an uncomfortable experience of large temperature change to users. In the process of operation, the waste heat of the compressor and the condenser is also not well recovered and utilized. In particular, in the process of low-temperature heating, the air conditioning system is controlled to operate in a refrigeration mode when the outdoor heat exchanger is defrosted. The defrosting process is not conducive to reducing the temperature on the indoor side, and the indoor temperature fluctuation reduces the user's comfort. In the prior art, an electric heating component is added to the indoor unit to reduce the reduction of the indoor temperature by operating it. However, this method has high energy consumption and cannot effectively recover and utilize the waste heat of the system operation. SUMMARY

[0003] Therefore, the present application provides an air conditioner heat recovery system, an air conditioner system having the same, and an air conditioner control method, which can solve the technical problem that the defrosting of the outdoor heat exchanger in the prior art causes the indoor temperature to fluctuate and reduces the user's comfort, and the method of operating an electric heating component has high energy consumption and is not environmentally friendly.

[0004] To solve the above problems, the present application provides an air conditioner heat recovery system, comprising:

[0005] a liquid storage tank having a first containing cavity containing a heat exchange working medium;

[0006] a pumping component;

[0007] a first heat exchanger corresponding to an indoor heat exchanger of an air conditioning system and located on the air outlet side of the indoor heat exchanger;

[0008] a second heat exchanger corresponding to a compressor of the air conditioning system and capable of at least partially absorbing the waste heat generated by the operating compressor;

[0009] The heat exchange working medium can circulate between the first heat exchanger, the second heat exchanger, and the liquid storage tank under the driving action of the pumping component.

[0010] In some embodiments, the liquid storage tank and the first heat exchanger are connected by a first pipeline, the first heat exchanger and the second heat exchanger are connected by a second pipeline, and the second heat exchanger and the liquid storage tank are connected by a third pipeline. The air conditioner heat recovery system further comprises:

[0011] A third heat exchanger is provided corresponding to an outdoor heat exchanger of the air conditioning system, the third heat exchanger is connected in series on a fourth pipeline, the fourth pipeline is connected in parallel with the first heat exchanger, a first flow regulating valve is further connected in series on the first pipeline, and a second flow regulating valve is further connected in series on the fourth pipeline.

[0012] In some embodiments, the air conditioning heat recovery system further comprises:

[0013] A fifth pipeline is connected in parallel with the second heat exchanger, the fifth pipeline is connected with the second pipeline at a first connection point, a first shutoff valve is further connected in series on the fifth pipeline, a second shutoff valve is further connected in series on the second pipeline, and the second shutoff valve is between the second heat exchanger and the first connection point, the fourth pipeline is connected with the second pipeline at a second connection point, and the second connection point is between the first connection point and the first heat exchanger.

[0014] In some embodiments,

[0015] An outer circumferential wall of the liquid storage tank is surrounded by an outer heat insulation shell.

[0016] In some embodiments,

[0017] A second containing cavity is formed between the outer heat insulation shell and the outer circumferential wall of the liquid storage tank, and the second containing cavity is used for containing condensate water generated during operation of the indoor heat exchanger.

[0018] The application further provides an air conditioning system comprising the air conditioning heat recovery system.

[0019] The application further provides a control method of an air conditioning system, which is used for controlling the air conditioning system, and comprises the following steps:

[0020] Obtaining an operation mode of the air conditioning system;

[0021] According to the obtained operation mode, switching the operation state of a four-way reversing valve, a pumping component, a first flow regulating valve, a second flow regulating valve, a first shutoff valve and a second shutoff valve of the air conditioning system.

[0022] In some embodiments,

[0023] When the operation mode is a defrosting mode, the four-way reversing valve is controlled to be in a refrigeration state, the second flow regulating valve and the first shutoff valve are controlled to be cut off, the first flow regulating valve is controlled to be fully opened, the second shutoff valve is controlled to be connected, and the pumping component is controlled to be operated at a high speed; or

[0024] when the operation mode is the frost prevention heating mode, controlling the four-way reversing valve to be in a heating state, and controlling the second flow regulating valve to be fully open, the first shutoff valve to be shut off, the first flow regulating valve to be open, the second shutoff valve to be communicated, and the pumping component to operate; or,

[0025] when the operation mode is the dehumidification heating mode, controlling the four-way reversing valve to be in a cooling state, and controlling the first flow regulating valve to be fully open, the first shutoff valve to be shut off, the second flow regulating valve to be open, the second shutoff valve to be communicated, and the pumping component to operate; or,

[0026] when the operation mode is the normal heating mode, controlling the four-way reversing valve to be in a heating state, and controlling the first flow regulating valve to be fully open, the first shutoff valve to be shut off, the second flow regulating valve to be closed, the second shutoff valve to be communicated, and the pumping component to operate at a low speed; or,

[0027] when the operation mode is the cooling mode, controlling the four-way reversing valve to be in a cooling state, and controlling the first flow regulating valve to be closed, the first shutoff valve to be communicated, the second flow regulating valve to be fully open, the second shutoff valve to be shut off, and the pumping component to operate.

[0028] In some embodiments,

[0029] when the four-way reversing valve is in the heating state, acquiring an outdoor environment temperature T,

[0030] when T≥t0, controlling the air conditioning system to operate in the normal heating mode; or,

[0031] when T

[0032] when ΔT1≤t1, controlling the air conditioning system to operate in the frost prevention heating mode;

[0033] when ΔT1>t1, controlling the air conditioning system to operate in the defrost mode, wherein t0 is an outdoor temperature setting threshold, and t1 is a first pipe temperature difference value.

[0034] In some embodiments,

[0035] when the air conditioning system operates in the frost prevention heating mode, the opening degree of the first flow regulating valve is proportional to the difference between ΔT1 and t1, and the rotating speed of the pumping component is proportional to the operating frequency of the compressor; or,

[0036] when the air conditioning system operates in the dehumidification heating mode, the opening degree of the second flow regulating valve is proportional to the difference between an indoor environment temperature and an outlet air temperature of the indoor heat exchanger, and the rotating speed of the pumping component is proportional to the operating frequency of the compressor; or,

[0037] When the air conditioning system operates the cooling mode, the rotation speed of the pumping component is proportional to the operating frequency of the compressor.

[0038] The air conditioning heat recovery system provided by the application has the following beneficial effects:

[0039] The first heat exchanger is arranged at the air outlet side of the indoor heat exchanger, and the second heat exchanger is arranged adjacent to the compressor. In this way, when the corresponding air conditioning system operates in the heating mode or the dehumidification mode, the circulating heat exchange medium absorbs the waste heat generated by the operation of the compressor at the second heat exchanger, and transfers this part of heat to the air outlet side of the indoor heat exchanger on the indoor side to heat and warm the indoor air outlet airflow of the air conditioner, thereby reducing the energy consumption of the air conditioning system in the heating mode and improving the operating energy efficiency. In addition, the airflow after condensation and dehumidification can be reheated and warmed, the user's use experience is improved, the operation waste heat of the compressor is recycled and utilized, and energy saving and environmental protection are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0041] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the application can be implemented, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the application can produce, should still fall within the scope of the technical content disclosed by the application.

[0042] Figure 1 System schematic diagram of the air conditioning heat recovery system of the embodiment of the application;

[0043] Figure 2 System schematic diagram of the air conditioning system with the air conditioning heat recovery system of the embodiment of the application;

[0044] Figure 3 State schematic diagram of the air conditioning system of the embodiment of the application when operating the defrosting mode;

[0045] Figure 4 State schematic diagram of the air conditioning system of the embodiment of the application when operating the anti-frosting heating mode;

[0046] Figure 5 Fig. 1 is a state diagram of the air conditioning system of the embodiment of the present application in a dehumidification and heating mode;

[0047] Figure 6 Fig. 2 is a state diagram of the air conditioning system of the embodiment of the present application in a normal heating mode;

[0048] Figure 7 Fig. 3 is a state diagram of the air conditioning system of the embodiment of the present application in a cooling mode;

[0049] Figure 8 Fig. 4 is a control logic diagram of the air conditioning system of the embodiment of the present application.

[0050] The reference signs are as follows:

[0051] 1, liquid storage tank; 11, heat-insulating outer shell; 111, condensed water introduction pipe; 112, condensed water discharge pipe; 2, pumping component; 3, first heat exchanger; 4, second heat exchanger; 5, third heat exchanger; 61, first flow regulating valve; 62, second flow regulating valve; 71, first shutoff valve; 72, second shutoff valve; 10, indoor heat exchanger; 101, indoor fan; 20, compressor; 30, outdoor heat exchanger; 301, outdoor fan; 40, throttling element; 50, four-way reversing valve. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0053] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component, and / or combinations thereof.

[0054] It should be understood that the term "and / or" used herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0055] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only and not to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered within the scope of the disclosure where appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is needed.

[0056] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application; the orientation terms "inner", "outer" refer to the inner and outer of the contour of the parts themselves.

[0057] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices as described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0058] In addition, it should be noted that the use of the terms "first", "second", and the like to describe various components does not limit the corresponding components in any way unless otherwise specifically stated, and therefore should not be construed as limiting the scope of protection of the present application.

[0059] With reference to Figure 1 and Figure 8 As shown in the drawings, according to the embodiment of the present application, an air conditioner heat recovery system is provided, comprising: a liquid storage tank 1 having a first storage cavity (not labeled in the drawings) containing heat exchange working medium; a pumping component 2, which can be a commonly used liquid pump; a first heat exchanger 3, which is arranged corresponding to an indoor heat exchanger 10 of an air conditioning system, and is located at the air outlet side of the indoor heat exchanger 10; a second heat exchanger 4, which is arranged corresponding to a compressor 20 of the air conditioning system, and can at least partially absorb the waste heat generated by the running compressor 20; the heat exchange working medium can circulate between the first heat exchanger 3, the second heat exchanger 4 and the liquid storage tank 1 under the driving action of the pumping component 2, and the heat exchange working medium can be, for example, water containing an antifreeze agent. The corresponding arrangement specifically refers to the arrangement of the two heat exchangers adjacent to each other, with the principle of being able to realize heat exchange between the two.

[0060] In this technical solution, the first heat exchanger 3 is arranged at the air outlet side of the indoor heat exchanger 10, and the second heat exchanger 4 is arranged adjacent to the compressor 20. In this way, when the corresponding air conditioning system is running in heating mode or dehumidification mode, the circulating heat exchange working medium absorbs the waste heat generated by the running compressor 20 at the second heat exchanger 4, and transfers this part of heat to the air outlet side of the indoor heat exchanger 10 on the indoor side to heat and warm the indoor air outlet flow of the air conditioner, which can reduce the energy consumption of the air conditioning system in heating mode, improve the operating energy efficiency, and also reheat and warm the airflow after condensation and dehumidification, improve the user's experience, realize the recycling of the waste heat of the compressor 20, and save energy and protect the environment.

[0061] As shown in Figure 1 The liquid storage tank 1 and the first heat exchanger 3 are communicated through a first pipeline, the first heat exchanger 3 and the second heat exchanger 4 are communicated through a second pipeline, and the second heat exchanger 4 and the liquid storage tank 1 are communicated through a third pipeline. The air conditioner heat recovery system further comprises: a third heat exchanger 5, which is arranged corresponding to an outdoor heat exchanger 30 of the air conditioning system, the third heat exchanger 5 is connected in series on a fourth pipeline, and the fourth pipeline is connected in parallel with the first heat exchanger 3, a first flow regulating valve 61 is also connected in series on the first pipeline, and a second flow regulating valve 62 is also connected in series on the fourth pipeline.

[0062] In the technical solution, the first flow regulating valve 61 and the second flow regulating valve 62 are used to control the flow of the heat exchange medium in the first pipeline and the second pipeline respectively, and when the flow is adjusted to 0, the first flow regulating valve 61 and the second flow regulating valve 62 are used as a shut-off valve. The third heat exchanger 5 is arranged adjacent to the outdoor heat exchanger 30. In the cooling mode, the cold energy of the condensate water generated in the indoor heat exchanger 10 can be at least partially transferred to the outdoor heat exchanger 30 to pre-cool the outdoor heat exchanger 30 and improve the heat exchange effect. In the dehumidification and heating mode, the waste heat of the outdoor heat exchanger 30 can be transferred to the first heat exchanger 3 on the indoor side through the third heat exchanger 5 to heat and warm the dehumidified and condensed air flow, improve the comfort of the indoor user, and prevent the dehumidified and condensed air flow from directly contacting the user to cause discomfort.

[0063] Continuing to refer to Figure 1 As shown, the air conditioning heat recovery system further comprises a fifth pipeline in parallel with the second heat exchanger 4, the fifth pipeline communicates with the second pipeline at a first connection point, the fifth pipeline further has a first shut-off valve 71 connected in series, the second pipeline further has a second shut-off valve 72 connected in series, and the second shut-off valve 72 is between the second heat exchanger 4 and the first connection point, the fourth pipeline communicates with the second pipeline at a second connection point, and the second connection point is between the first connection point and the first heat exchanger 3.

[0064] In the technical solution, the first shut-off valve 71 and the second shut-off valve 72 are used to control whether the heat exchange medium flows in the second heat exchanger 4, that is, whether the heat exchange medium is used to recover and utilize the waste heat of the compressor 20. Specifically, when the cold energy of the condensate water formed by the indoor heat exchanger 10 is used to cool the outdoor heat exchanger 30 in the cooling mode, the heat exchange medium can flow back to the liquid tank 1 directly through the fifth pipeline without flowing through the second heat exchanger 4.

[0065] In some embodiments, the outer periphery of the liquid tank 1 is surrounded by a heat-insulating shell 11, which can be made of thermal insulation material. The heat-insulating shell 11 can ensure heat exchange between the heat exchange medium in the liquid tank 1 and the external environment, and prevent the full utilization of the recovered heat or cold energy.

[0066] In a preferred embodiment,

[0067] The second containing cavity is formed between the heat insulation shell 11 and the outer peripheral wall of the liquid storage tank 1, and is used for containing the condensed water generated during the operation of the indoor heat exchanger 10. It can be understood that the heat insulation shell 11 has a condensed water introduction pipe 111 and a condensed water outlet pipe 112 which are in controllable communication with the second containing cavity, wherein the condensed water introduction pipe 111 is in communication with the drain pipe of the water pan of the indoor unit, and the condensed water outlet pipe 112 is in communication with the external drain pipe. In this way, the condensed water generated by the indoor heat exchanger 10 can be guided into the second containing cavity to cool and lower the temperature of the heat exchange working medium in the first containing cavity, and then the cold energy of the condensed water is used to cool the outdoor heat exchanger 30.

[0068] According to the embodiment of the present application, an air conditioning system is also provided, as shown in Figure 2 The first heat exchanger 3 is arranged on the air outlet side of the indoor heat exchanger 10, the second heat exchanger 4 is arranged adjacent to the compressor 20, and the third heat exchanger 5 is arranged adjacent to the outdoor heat exchanger 30. It can be understood that the indoor heat exchanger 10 is correspondingly provided with an indoor fan 101, the outdoor heat exchanger 30 is correspondingly provided with an outdoor fan 301, and the condensed water introduction pipe 111 of the liquid storage tank 1 is in communication with the water pan of the indoor heat exchanger 10.

[0069] According to the embodiment of the present application, a control method of an air conditioning system is also provided, which is used for controlling the above-mentioned air conditioning system, and includes the following steps:

[0070] Obtaining the operation mode of the air conditioning system;

[0071] According to the obtained operation mode, the operation state of the four-way reversing valve 50, the pumping component 2, the first flow regulating valve 61, the second flow regulating valve 62, the first shutoff valve 71 and the second shutoff valve 72 of the air conditioning system is switched.

[0072] In the technical scheme, different states of the valves can be matched in each operation mode, so that the waste heat generated by the compressor 20 or the cold energy of the condensed water generated by the indoor heat exchanger 10 can be recycled in each operation mode, which is energy-saving and environment-friendly, and the system has high energy efficiency and low power consumption.

[0073] Specifically referring to Figure 3As shown, when the operation mode is the defrosting mode, the four-way reversing valve 50 is controlled to be in the refrigeration state, the second flow regulating valve 62 and the first shutoff valve 71 are controlled to be shutoff, the first flow regulating valve 61 is controlled to be fully open, the second shutoff valve 72 is controlled to be connected, and the pumping component 2 is controlled to operate at high speed (opposite to the low speed, which is higher than the low speed). At this time, the second heat exchanger 4 transfers the waste heat generated by the compressor 20 to the first heat exchanger 3 at the air outlet side of the indoor heat exchanger 10, and the waste heat absorbed by the heat exchange medium is used to heat and increase the temperature of the indoor air outlet. This reduces the adverse effect of the decrease in the indoor temperature caused by the indoor heat exchanger 10 as an evaporator in the defrosting mode. At this time, it can be understood that the speed of the indoor fan 101 should be relatively low, and the outdoor fan 301 should be stopped, so as to ensure that the indoor air supply temperature is not too low while the outdoor heat exchanger 30 is quickly and efficiently defrosted, thereby ensuring the use comfort of the indoor user. The high-speed operation of the pumping component 2 is beneficial to the full recycling of the waste heat of the compressor 20.

[0074] Specifically referring to Figure 4 As shown, when the operation mode is the defrosting mode, the four-way reversing valve 50 is controlled to be in the refrigeration state, the second flow regulating valve 62 and the first shutoff valve 71 are controlled to be shutoff, the first flow regulating valve 61 is controlled to be fully open, the second shutoff valve 72 is controlled to be connected, and the pumping component 2 is controlled to operate at high speed (opposite to the low speed, which is higher than the low speed). At this time, the second heat exchanger 4 transfers the waste heat generated by the compressor 20 to the first heat exchanger 3 at the air outlet side of the indoor heat exchanger 10, and the waste heat absorbed by the heat exchange medium is used to heat and increase the temperature of the indoor air outlet. This reduces the adverse effect of the decrease in the indoor temperature caused by the indoor heat exchanger 10 as an evaporator in the defrosting mode. At this time, it can be understood that the speed of the indoor fan 101 should be relatively low, and the outdoor fan 301 should be stopped, so as to ensure that the indoor air supply temperature is not too low while the outdoor heat exchanger 30 is quickly and efficiently defrosted, thereby ensuring the use comfort of the indoor user. The high-speed operation of the pumping component 2 is beneficial to the full recycling of the waste heat of the compressor 20.

[0075] In the technical solution, the waste heat generated by the operation of the compressor 20 is used to increase the temperature of the outdoor heat exchanger 30, so as to prevent the outdoor unit from frosting due to the excessively low temperature. The aforementioned anti-frosting is to delay the frosting as much as possible. The larger the difference between the aforementioned △T1 and t1, the higher the possibility of frosting. At this time, introducing more heat exchange medium to the outdoor heat exchanger 30 can significantly delay the frosting process. Meanwhile, the operating frequency of the compressor 20 is proportional to the speed of the pumping component 2, so that the large amount of heat generated by the high-speed operation of the compressor 20 can be timely transferred. This is beneficial to the reliable operation of the compressor, and the indoor air outlet is additionally heated at the first heat exchanger 3, thereby improving the energy efficiency of the system.

[0076] Specifically referring to Figure 5As shown, when the operation mode is the dehumidification and heating mode, the four-way reversing valve 50 is controlled to be in the refrigeration state, the first flow regulating valve 61 is controlled to be fully open, the first shutoff valve 71 is controlled to be shut off, the second flow regulating valve 62 is controlled to be open, the second shutoff valve 72 is controlled to be connected, and the pumping component 2 is operated. Specifically, when the air conditioning system operates in the dehumidification and heating mode, the opening degree of the second flow regulating valve 62 is proportional to the difference AT2 between the indoor environment temperature and the outlet air temperature of the indoor heat exchanger 10, and the rotating speed of the pumping component 2 is proportional to the operating frequency of the compressor 20.

[0077] In this technical solution, the indoor heat exchanger 10 condenses and dehumidifies the indoor airflow, and the air conditioning system as a whole is in a refrigeration cycle state. The first heat exchanger 3 transfers the waste heat generated at the compressor 20 and the outdoor heat exchanger 30 to the indoor side to heat and warm the dehumidified and cooled airflow, and then discharges the airflow to the indoor side, thereby effectively preventing the over-cooled airflow after cooling from being blown to the user to cause discomfort to the user. In this technical solution, the greater the difference AT2 between the indoor environment temperature and the outlet air temperature of the indoor heat exchanger 10, the greater the opening degree of the second flow regulating valve 62, so as to ensure the stability of the indoor environment temperature and reduce the temperature fluctuation to the minimum.

[0078] Specifically referring to Figure 6 As shown, when the operation mode is the ordinary heating mode, the four-way reversing valve 50 is controlled to be in the heating state, the first flow regulating valve 61 is controlled to be fully open, the first shutoff valve 71 is controlled to be shut off, the second flow regulating valve 62 is controlled to be closed, the second shutoff valve 72 is controlled to be connected, and the pumping component 2 is operated at a low speed. In this technical solution, the second heat exchanger 4 absorbs and transfers the waste heat generated at the compressor 20 to the first heat exchanger 3 to assist indoor heating, thereby improving the operating energy efficiency of the system; or,

[0079] Specifically referring to Figure 7 As shown, when the operation mode is the refrigeration mode, the four-way reversing valve 50 is controlled to be in the refrigeration state, the first flow regulating valve 61 is controlled to be closed, the first shutoff valve 71 is controlled to be connected, the second flow regulating valve 62 is controlled to be fully open, the second shutoff valve 72 is controlled to be shut off, and the pumping component 2 is operated. At this time, the rotating speed of the pumping component 2 is proportional to the operating frequency of the compressor 20.

[0080] In this technical solution, the indoor heat exchanger 10 is an evaporator, and condensate water is generated during operation. The generated condensate water flows into the second containing cavity, and the cold energy of the condensate water cools the heat exchange medium in the first containing cavity. The cooled heat exchange medium is transferred to the third heat exchanger 5, so as to be cooled together with the outdoor fan 301 to cool the outdoor heat exchanger 30, thereby improving the energy efficiency of the system.

[0081] Referring to Figure 8 As shown, in some embodiments,

[0082] When the four-way reversing valve 50 is in the heating state, an outdoor environment temperature T is acquired,

[0083] When T≥t0, the air conditioning system is controlled to run the normal heating mode; or,

[0084] When T<t0, the size relationship between the outdoor environment temperature T and a first temperature difference value ΔT1 of the third heat exchanger 5 and t1 is judged,

[0085] When ΔT1≤t1, the air conditioning system is controlled to run the anti-frosting heating mode;

[0086] When ΔT1>t1, the air conditioning system is controlled to run the defrosting mode, wherein t0 is an outdoor temperature setting threshold value, and t1 is the first temperature difference value.

[0087] The following is combined Figure 8 An embodiment of the present application is further described:

[0088] When the air conditioning system runs in the heating mode (i.e., the four-way reversing valve 50 is in the heating state), the outdoor environment temperature is divided according to the outdoor environment temperature. When the temperature is high, the outdoor heat exchanger is not easy to frost, at this time, the second flow regulating valve 62 is fully closed, the first flow regulating valve 61 is fully opened, the first shutoff valve 71 is closed, the second shutoff valve 72 is opened, the pump (i.e., the pumping component 2, the same below) runs at low speed, the first heat exchanger 3 absorbs the heat of the second heat exchanger 4, and the compressor heat (i.e., the waste heat generated by the operation of the compressor 20, the same below) is transferred through the pump and the internal fluid (i.e., the heat exchange working medium, the same below), and the evaporation temperature of the outdoor heat exchanger 30 is correspondingly improved, and the heating energy efficiency is improved;

[0089] When the temperature is low and does not meet the defrosting condition (i.e., the anti-frosting heating mode described above), the second flow regulating valve 62 is fully opened, the first flow regulating valve 61 is controlled to be opened and the opening degree is controlled according to the difference between ΔT1 and t1, the smaller the difference, the smaller the opening degree of the first flow regulating valve 61, the first shutoff valve 71 is closed, and the second shutoff valve 72 is opened, when the compressor temperature is too low, the first shutoff valve 71 is also opened, to avoid affecting the efficiency of the compressor, the pump speed is freely adjusted according to the compressor speed, the compressor runs at high frequency, and the pump runs at high speed, the third heat exchanger 5 absorbs the heat of the first heat exchanger 3 and the second heat exchanger 4, not only recovers the waste heat of the compressor (i.e., waste heat), but also uses part of the heat pump heating capacity, effectively prolongs the defrosting period of the outdoor heat exchanger, and improves the user's use comfort;

[0090] When the temperature is low and the defrosting condition is met, the second flow regulating valve 62 is fully closed, the first flow regulating valve 61 is fully opened, the first cut-off valve 71 is closed, the second cut-off valve 72 is opened, the pump is operated at high speed, the first heat exchanger 3 absorbs the heat of the second heat exchanger 4, the indoor air is reheated by the waste heat of the compressor and the heat storage of the fluid in the accumulator, and the pump and the indoor fan are stopped when the outlet air temperature is lower than the set temperature, so as to avoid the cold wind affecting the use of the user.

[0091] When the indoor humidity is large and the dehumidification mode is opened, the second flow regulating valve 62 is opened and the opening degree is controlled according to the difference ΔT2 between the indoor environment temperature and the outlet air temperature, the larger the difference, the larger the opening degree of the second flow regulating valve 62, the first flow regulating valve 61 is fully opened, the first cut-off valve 71 is closed, the second cut-off valve 72 is opened, the pump is freely adjusted according to the compressor speed, the compressor is operated at high frequency, the first heat exchanger 3 absorbs the heat of the third heat exchanger 5 and the second heat exchanger 4, so as to realize the reheating of the dehumidified air and improve the comfort.

[0092] When the ordinary refrigeration mode is opened, the second flow regulating valve 62 is fully opened, the first flow regulating valve 61 is fully closed, the first cut-off valve 71 is opened, the second cut-off valve 72 is closed, the pump is freely adjusted according to the compressor speed, the accumulator absorbs the cold water cold energy, and the outdoor heat exchanger 30 is pre-cooled, so as to improve the energy efficiency of the air conditioner.

[0093] The mode switching of the air conditioner is performed according to the setting, the pump is stopped during the switching process, and the air conditioning system performs corresponding actions according to the conditions after the air conditioner operates for a certain period of time. The fluid in the accumulator 1 needs to meet the characteristics of large specific heat capacity, strong fluidity, not easy to freeze and safe and reliable, and the heat exchanger needs to meet the heat exchange capacity while trying to reduce the space. The outside of the accumulator 1 needs to be insulated with insulation materials, the indoor condensate water drainage pipe is connected with the outer surface of the accumulator 1 (i.e. the aforementioned heat insulation shell 11), enters the cavity between the outer wall wrapped by the insulation materials and the inner wall, the heat insulation shell 11 is provided with a liquid level drainage hole (i.e. the aforementioned condensate water outlet pipe 112), which can control whether water needs to be stored in the cavity. The use of a set of air conditioning heat recovery system meets the needs of various use environments of the air conditioning system, reduces energy consumption and improves user comfort.

[0094] The above description is only the preferred embodiment of the present application, and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioning heat recovery system, characterised in that, The air conditioner heat recovery system comprises: a liquid storage tank (1) having a first storage cavity for containing a heat exchange medium; a pumping component (2); a first heat exchanger (3) corresponding to an indoor heat exchanger (10) of an air conditioner system and arranged at an air outlet side of the indoor heat exchanger (10); a second heat exchanger (4) corresponding to a compressor (20) of the air conditioner system and capable of at least partially absorbing waste heat generated by the compressor (20) in operation; the heat exchange medium is capable of circulating between the first heat exchanger (3), the second heat exchanger (4) and the liquid storage tank (1) under the driving action of the pumping component (2); the liquid storage tank (1) is in communication with the first heat exchanger (3) through a first pipeline, the first heat exchanger (3) is in communication with the second heat exchanger (4) through a second pipeline, and the second heat exchanger (4) is in communication with the liquid storage tank (1) through a third pipeline; the air conditioner heat recovery system further comprises a third heat exchanger (5) corresponding to an outdoor heat exchanger (30) of the air conditioner system, the third heat exchanger (5) is connected in series on a fourth pipeline, and the fourth pipeline is connected in parallel with the first heat exchanger (3); a first flow regulating valve (61) is further connected in series on the first pipeline, and a second flow regulating valve (62) is further connected in series on the fourth pipeline; the air conditioner heat recovery system further comprises a fifth pipeline connected in parallel with the second heat exchanger (4), the fifth pipeline is in communication with the second pipeline at a first connection point, a first shutoff valve (71) is further connected in series on the fifth pipeline, a second shutoff valve (72) is further connected in series on the second pipeline, and the second shutoff valve (72) is located between the second heat exchanger (4) and the first connection point; the fourth pipeline is in communication with the second pipeline at a second connection point, and the second connection point is located between the first connection point and the first heat exchanger (3).

2. The air conditioner heat recovery system according to claim 1, wherein an outer peripheral wall of the liquid storage tank (1) is surrounded by a heat insulation shell (11).

3. The air conditioner heat recovery system according to claim 2, wherein a second storage cavity is formed between the heat insulation shell (11) and the outer peripheral wall of the liquid storage tank (1), and the second storage cavity is used for containing condensate water generated during operation of the indoor heat exchanger (10).

4. An air conditioning system characterized by comprising: The air conditioner heat recovery system according to any one of claims 1 to 3.

5. A control method of an air conditioning system, characterized by, The control method for the air conditioner system according to claim 4 comprises the following steps: obtaining an operation mode of the air conditioner system; controlling switching of operation states of a four-way reversing valve (50), a pumping component (2), a first flow regulating valve (61), a second flow regulating valve (62), a first shutoff valve (71) and a second shutoff valve (72) of the air conditioner system according to the obtained operation mode.

6. The control method according to claim 5, wherein When the operation mode is the defrosting mode, the four-way reversing valve (50) is controlled to be in the refrigeration state, the second flow regulating valve (62) and the first shutoff valve (71) are controlled to be cut off, the first flow regulating valve (61) is controlled to be fully opened, the second shutoff valve (72) is controlled to be connected, and the pumping component (2) is controlled to run at high speed; or, When the operation mode is the frost prevention heating mode, the four-way reversing valve (50) is controlled to be in the heating state, the second flow regulating valve (62) is controlled to be fully opened, the first shutoff valve (71) is controlled to be cut off, the first flow regulating valve (61) is controlled to be opened, the second shutoff valve (72) is controlled to be connected, and the pumping component (2) is controlled to run; or, When the operation mode is the dehumidification and heating mode, the four-way reversing valve (50) is controlled to be in the refrigeration state, the first flow regulating valve (61) is controlled to be fully opened, the first shutoff valve (71) is controlled to be cut off, the second flow regulating valve (62) is controlled to be opened, the second shutoff valve (72) is controlled to be connected, and the pumping component (2) is controlled to run; or, When the operation mode is the normal heating mode, the four-way reversing valve (50) is controlled to be in the heating state, the first flow regulating valve (61) is controlled to be fully opened, the first shutoff valve (71) is controlled to be cut off, the second flow regulating valve (62) is controlled to be closed, the second shutoff valve (72) is controlled to be connected, and the pumping component (2) is controlled to run at low speed; or, When the operation mode is the refrigeration mode, the four-way reversing valve (50) is controlled to be in the refrigeration state, the first flow regulating valve (61) is controlled to be closed, the first shutoff valve (71) is controlled to be connected, the second flow regulating valve (62) is controlled to be fully opened, the second shutoff valve (72) is controlled to be cut off, and the pumping component (2) is controlled to run.

7. The control method according to claim 6, wherein, when the four-way reversing valve (50) is in the heating state, an outdoor environment temperature T is obtained, when T≥t0, the air conditioning system is controlled to run in the normal heating mode; or when T when ΔT1≤t1, the air conditioning system is controlled to run in the frost prevention heating mode; and when ΔT1>t1, the air conditioning system is controlled to run in the defrosting mode, wherein t0 is an outdoor temperature setting threshold, and t1 is a first pipe temperature difference value.

8. The control method according to claim 7, wherein, when the air conditioning system runs in the frost prevention heating mode, an opening degree of the first flow regulating valve (61) is proportional to a difference between ΔT1 and t1, and a rotating speed of the pumping component (2) is proportional to a running frequency of the compressor (20); or when the air conditioning system runs in the dehumidification and heating mode, an opening degree of the second flow regulating valve (62) is proportional to a difference between an indoor environment temperature and an outlet air temperature of the indoor heat exchanger (10), and the rotating speed of the pumping component (2) is proportional to the running frequency of the compressor (20); or when the air conditioning system runs in the refrigeration mode, the rotating speed of the pumping component (2) is proportional to the running frequency of the compressor (20). ​ ​

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