Air conditioner with waste heat recovery function

Abstract

The air conditioner with the waste heat recovery function comprises an indoor unit with an air outlet, the indoor unit is used for absorbing indoor air for heat exchange treatment and then discharging the indoor air into a room again so as to adjust the indoor temperature, a first fan is arranged on one side of a coil pipe, and a refrigerating system is used for conducting heat exchange with the air entering the indoor unit; according to the embodiment of the invention, the indoor unit and the refrigerating system are arranged, the indoor unit is used for absorbing indoor air for heat exchange treatment and then discharging the air into a room again so as to adjust the indoor temperature, and the refrigerating system is used for carrying out heat exchange on the air sucked by the indoor unit, so that the indoor temperature is adjusted. In addition, the auxiliary heating system is arranged on one side of the condenser in the refrigerating system, when the indoor temperature needs to be increased, the auxiliary heating system can absorb heat at the position of the condenser and transfer the heat into the room to achieve heating, waste heat recycling is improved, and the energy use efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning with a waste heat recovery function. Background Art

[0002] Air conditioning is an air conditioner, which generally includes cold source and heat source equipment, cold and hot medium distribution system, terminal device and other parts and other auxiliary equipment, mainly including refrigeration main unit, water pump, fan and piping system. The terminal device is responsible for using the cold and heat distributed to specifically process the air state so that the air parameters of the target environment meet certain requirements. The refrigeration working principle of the air conditioner is as follows: the compressor can compress the refrigerant into liquid, and then send the liquid into the room. At this time, the indoor hot air contacts the evaporator, and the liquid refrigerant is heated to become gaseous, taking away the indoor heat to the outdoor condenser. Under the blowing of the fan and the pressure change, it quickly releases heat to the outdoors; the heating principle is as follows: the liquid refrigerant flows to the outdoor unit, absorbs heat and becomes gas, and the formed gas refrigerant flows to the indoor unit, and returns to liquid state after releasing heat indoors.

[0003] In the process of implementing the utility model, the inventor found that there are at least the following technical problems in the prior art:

[0004] At present, during the operation of the air conditioner, the ordinary air conditioner usually handles the heat generated at the condenser by directly discharging the heat to the outside through a fan, resulting in waste of excess heat and not conducive to improving energy efficiency. Utility Model Content

[0005] In view of this, the present application provides an air conditioner with waste heat recovery function, so as to at least solve the technical problem in the prior art that ordinary air conditioners directly discharge the heat at the condenser to the outside, causing waste heat and being not conducive to improving energy utilization efficiency.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] The embodiment of the present application provides an air conditioner with a waste heat recovery function, comprising:

[0008] An indoor unit with an air outlet is used to absorb indoor air for heat exchange and then discharge it back into the room to adjust the indoor temperature. The indoor unit includes a coil and a first fan, and the first fan is arranged on one side of the coil;

[0009] a refrigeration system for exchanging heat with air entering the indoor unit;

[0010] An outdoor unit, wherein the refrigeration system is arranged in the outdoor unit, and the outdoor unit is connected to the indoor unit through a pipeline;

[0011] The auxiliary heating system is arranged in the outdoor unit and communicated with the coil.

[0012] Optionally, the refrigeration system includes a compressor, a condenser, an electronic expansion valve and a first heat exchanger which are connected in sequence through pipelines to form a loop.

[0013] Optionally, the refrigeration system includes a compressor, a condenser, a solenoid valve, a capillary tube and a first heat exchanger which are connected in sequence through pipelines to form a loop.

[0014] Optionally, the auxiliary heat system includes a second heat exchanger, which is arranged at one side of the condenser and is used to absorb heat from the condenser. The second heat exchanger is connected to the fan coil unit.

[0015] Optionally, the auxiliary heat system further includes a heating element connected in series with the second heat exchanger.

[0016] Optionally, the refrigeration system further includes a second fan and a third fan, the second fan is arranged on one side of the first heat exchanger, and the third fan is arranged on one side of the condenser.

[0017] Optionally, the air conditioner further comprises:

[0018] a first three-way valve, through which the inlet end of the coil is respectively connected to the outlet of the first heat exchanger and the outlet of the second heat exchanger;

[0019] A second three-way valve, through which the outlet end of the coil is respectively connected to the inlet of the first heat exchanger and the inlet of the second heat exchanger.

[0020] Optionally, the air conditioner further comprises:

[0021] A control system is arranged in the indoor unit, and the control system is electrically connected to the refrigeration system and the auxiliary heating system.

[0022] Optionally, the refrigeration system further comprises a filter, and the filter is arranged in series in a pipeline between the condenser and the electronic expansion valve.

[0023] Optionally, the refrigeration system further includes a temperature sensor and a pressure sensor, the temperature sensor is arranged in series in a pipe between the condenser and the filter, and the pressure sensor is arranged in series in a pipe between the compressor and the condenser.

[0024] The air conditioner with waste heat recovery function provided in the embodiment of the present application has at least the following beneficial effects:

[0025] In the embodiment of the present application, an indoor unit and a refrigeration system are provided, wherein the indoor unit is used to absorb indoor air, perform heat exchange processing, and then discharge it back into the room to achieve indoor temperature regulation, while the refrigeration system performs heat exchange on the air sucked into the indoor unit. In addition, an auxiliary heating system is provided on the condenser side of the refrigeration system. When the indoor temperature needs to be increased, the auxiliary heating system can absorb heat from the condenser and transfer the heat to the room for heating, thereby improving waste heat recovery and energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present application;

[0028] Figure 2 is a structural schematic diagram of an air conditioner provided by another embodiment of the present application;

[0029] Figure 3 It is a structural schematic diagram of an air conditioner provided in another embodiment of the present application.

[0030] The specific reference numerals are as follows:

[0031] Indoor unit 1. Air outlet 101, coil 102, first fan 103;

[0032] Refrigeration system 2, compressor 201, condenser 202, electronic expansion valve 203, first heat exchanger 204, second fan 205, third fan 206, solenoid valve 207, capillary tube 208, filter 209, temperature sensor 210, pressure sensor 211;

[0033] Outdoor unit 3;

[0034] Auxiliary heat system 4, second heat exchanger 401, heating element 402;

[0035] First three-way valve 5;

[0036] Second three-way valve 6;

[0037] Control system. DETAILED DESCRIPTION

[0038] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Air conditioning is an air conditioner, which generally includes cold source and heat source equipment, cold and hot medium distribution system, terminal device and other parts and other auxiliary equipment, mainly including refrigeration main unit, water pump, fan and piping system. The terminal device is responsible for using the cold and heat distributed to specifically process the air state so that the air parameters of the target environment meet certain requirements. The refrigeration working principle of the air conditioner is as follows: the compressor can compress the refrigerant into liquid, and then send the liquid into the room. At this time, the indoor hot air contacts the evaporator, and the liquid refrigerant is heated to become gaseous, taking away the indoor heat to the outdoor condenser. Under the blowing of the fan and the pressure change, it quickly releases heat to the outdoors; the heating principle is as follows: the liquid refrigerant flows to the outdoor unit, absorbs heat and becomes gas, and the formed gas refrigerant flows to the indoor unit, and returns to liquid state after releasing heat indoors.

[0041] At present, during the operation of the air conditioner, the ordinary air conditioner usually handles the heat generated at the condenser by directly discharging the heat to the outside through a fan, resulting in waste of excess heat and not conducive to improving energy efficiency.

[0042] In order to solve the problems of the prior art, the applicant has improved the structure of the air conditioner. The embodiments of the present application are further described below.

[0043] In order to better understand this application, Figures 1 to 3 The embodiments of the present application are described.

[0044] The embodiment of the present application provides an air conditioner with a waste heat recovery function, including an indoor unit 1 with an air outlet 101, which is used to absorb indoor air for heat exchange treatment and then re-discharge it into the room to achieve indoor temperature regulation, the indoor unit 1 includes a coil 102 and a first fan 103, the first fan 103 is arranged on one side of the coil 102; a refrigeration system 2, which is used to exchange heat with the air entering the indoor unit 1; an outdoor unit 3, the refrigeration system 2 is arranged in the outdoor unit 3, and the outdoor unit 3 is connected to the indoor unit 1 through a pipeline; an auxiliary heat system 4, which is arranged in the outdoor unit 3 and connected to the coil 102.

[0045] Please refer to Figure 1 In this embodiment, the indoor unit 1 cooperates with the refrigeration system 2 to adjust the indoor temperature. It can be understood that the air conditioner in this embodiment can not only cool but also heat. Taking the air conditioner as a cooling system as an example, its specific refrigeration working principle is: a refrigerant circulates in the refrigeration system 2, and the refrigeration system 2 will reduce the temperature of the refrigerant. A refrigerant circulates in the circuit connected between the coil 102 and the refrigeration system 2. The refrigerant absorbs the heat of the refrigerant, thereby reducing the temperature of the refrigerant. When the low-temperature refrigerant flows to the coil 102, the liquid refrigerant in the coil 102 will evaporate into a gaseous refrigerant, thereby absorbing the heat of the hot air. The cooled hot air will re-enter the room from the air outlet 101 of the indoor unit 1 to reduce the ambient temperature of the entire room and achieve the purpose of cooling. The function of the auxiliary heating system 4 is that when the indoor temperature needs to be increased, the auxiliary heating system can absorb the heat at the condenser and transfer the heat to the room for heating, thereby improving the waste heat recovery and energy efficiency. It is not difficult to understand that in this embodiment, the refrigeration system 2 is arranged in the outdoor unit 3, and is arranged outdoors when in use, while the indoor unit 1 is placed indoors. At this time, the indoor unit 1 can be, but not limited to, a wall-mounted indoor unit, a cabinet-type indoor unit, and a ceiling-mounted indoor unit, and the coil 201 can be, but not limited to, a vertical fan coil, a horizontal fan coil, a wall-mounted fan coil, a cassette fan coil, etc., and can be selected according to actual conditions. In addition, the refrigerant in the refrigeration system 2 can also be selected from inorganic compound refrigerants, Freon, saturated hydrocarbon refrigerants, unsaturated hydrocarbon refrigerants, and azeotropic mixture refrigerants.

[0046] In some other embodiments of the present application, the refrigeration system 2 includes a compressor 201, a condenser 202, an electronic expansion valve 203 and a first heat exchanger 204 which are connected in sequence through pipelines to form a loop.

[0047] Please continue to refer to Figure 1In this embodiment, the compressor 201 compresses the low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure refrigerant vapor through the suction port of the compressor 201, exchanges heat with the air of the external environment in the condenser 202, and condenses into high-temperature and high-pressure refrigerant liquid. After throttling and reducing the pressure by the electronic expansion valve 203, it enters the first heat exchanger 204 to exchange heat with the refrigerant in the coil 102 circuit, evaporates into low-temperature and low-pressure refrigerant vapor, and completes a cycle.

[0048] In some other embodiments of the present application, the refrigeration system 2 includes a compressor 201, a condenser 202, a solenoid valve 207, a capillary tube 208 and a first heat exchanger 204 which are sequentially connected through pipelines to form a loop.

[0049] Please refer to Figure 2 Different from the above-mentioned embodiment, in this embodiment, the scheme of using the electronic expansion valve 203 is replaced by the scheme of using the solenoid valve 207 in cooperation with the capillary tube 208, wherein the main function of the solenoid valve 207 is to control the flow rate of the refrigerant, and the main function of the capillary tube 208 is to reduce the pressure. Taking the air conditioner in the cooling mode as an example, the low-temperature and low-pressure refrigerant vapor is compressed into high-temperature and high-pressure refrigerant vapor through the suction port of the compressor 201, and exchanges heat with the air of the external environment in the condenser 202, and condenses into high-temperature and high-pressure refrigerant liquid. After throttling and reducing the pressure by the solenoid valve 207 and the capillary tube 208, it enters the first heat exchanger 204 to exchange heat with the coolant in the coil 102 circuit, and evaporates into low-temperature and low-pressure refrigerant vapor, completing a cycle.

[0050] In some other embodiments of the present application, the auxiliary heat system 4 includes a second heat exchanger 401 , which is disposed on one side of the condenser 202 for absorbing heat from the condenser 202 , and is connected to the coil 102 .

[0051] Please refer to Figure 1 The auxiliary heat system 4 includes a second heat exchanger 401, wherein the second heat exchanger 401 is connected to the coil 102 through a pipeline to form a loop. The second heat exchanger 401 is arranged on one side of the condenser 202 to absorb excess heat dissipated by the condenser 202, and provide the excess heat to the coil 102 when the air conditioner is heating, so as to increase the indoor temperature. The auxiliary heat system 4 fully utilizes the excess heat generated at the condenser 202 during the operation of the air conditioner, realizes waste heat recovery, and improves the efficiency of energy use.

[0052] It can be understood that the first heat exchange plate 204 and the second heat exchange plate 401 can be but are not limited to flat plate heat exchangers, plate and tube heat exchangers, spiral plate heat exchangers, surface plate heat exchangers, etc. The types of the two can be the same or different, and can be selected according to actual conditions.

[0053] In some other embodiments of the present application, the auxiliary heat system 4 further includes a heating element 402 connected in series with the second heat exchanger 401 .

[0054] Please refer to Figure 3 In this embodiment, a heating element 402 is further provided in the auxiliary heating system 4. The heating element 402 can actively heat the medium in the circuit when the waste heat absorbed by the auxiliary heating system 4 from the condenser 202 is insufficient, so that the indoor temperature can reach the set temperature.

[0055] In some other embodiments of the present application, the refrigeration system further includes a second fan 205 and a third fan 206 , the second fan 205 is disposed on one side of the first heat exchanger 204 , and the third fan 206 is disposed on one side of the condenser 202 .

[0056] Please refer to Figure 1 In this embodiment, the function of the second fan 205 is to help the first heat exchanger 204 evaporate the low-pressure refrigerant coming out of the first electronic expansion valve 203 and absorb the heat of the air inhaled by the indoor unit 1 to achieve the purpose of heat exchange. The third fan 206 plays a role in heat dissipation at the condenser 202, taking away the heat of the high-temperature and high-pressure gas and turning it into a low-temperature and high-pressure liquid. At this time, the condenser 202 and the second heat exchanger 401 share the third fan 206, that is, the heat dissipated by the condenser 202 will be blown to the second heat exchanger 401 by the third fan 206, thereby increasing the efficiency of heat exchange.

[0057] In some other embodiments of the present application, the air conditioner also includes: a first three-way valve 5, through which the inlet end of the coil 102 is connected to the outlet of the first heat exchanger 204 and the outlet of the second heat exchanger 401 respectively; a second three-way valve 6, through which the outlet end of the coil 102 is connected to the inlet of the first heat exchanger 204 and the inlet of the second heat exchanger 401 respectively.

[0058] Please refer to Figure 1 The coil 102 is connected through the first three-way valve 5 and the second three-way valve 6 to form a double circuit. The circuit connected to the first heat exchanger 204 is mainly used for cooling, while the circuit connected to the second heat exchanger 401 is mainly used for heating.

[0059] In some other embodiments of the present application, the air conditioner also includes a control system, which is arranged in the indoor unit 1, and the control system is electrically connected to the refrigeration system 2 and the auxiliary heating system 4.

[0060] The control system (not shown in the figure) is arranged inside the indoor unit 1, and is mainly used to control the operation or shutdown of the refrigeration system 2 and each fan to achieve convenient control.

[0061] In some other embodiments of the present application, the refrigeration system 2 further includes a filter 209 , and the filter 209 is arranged in series in a pipeline between the condenser 202 and the electronic expansion valve 203 .

[0062] Please refer to Figure 2 In this embodiment, the refrigeration system 2 also includes a filter 209, wherein the filter 209 can be a drying filter, which is arranged in series in the pipeline between the condenser 202 and the electronic expansion valve 203. The filter 209 has three functions: the first function is to store liquid, store and supply liquid refrigerant in the refrigeration system 2. Generally speaking, when the air conditioner is just turned on, the air conditioning system has a large workload and a large circulation volume of the refrigerant, and the refrigerant needs to be replenished at this time. After working for a period of time, the load is reduced, and the required refrigerant dosage is reduced accordingly, which can compensate for the gains and losses and adjustments of the liquid refrigerant; the second function is to filter and remove dirt and dust, ensure the smooth circulation of the refrigerant, and not affect the normal operation of the pipeline; the third function is to absorb moisture in the refrigeration system 2 to prevent the pipeline of the refrigeration system 2 from being blocked and blocked by dirt, which affects the normal operation of the refrigeration system.

[0063] In some other embodiments of the present application, the refrigeration system 2 also includes a temperature sensor 210 and a pressure sensor 211. The temperature sensor 210 is arranged in series in the pipe between the condenser 202 and the filter 209, and the pressure sensor 211 is arranged in series in the pipe between the compressor 201 and the condenser 202.

[0064] Please continue to refer to Figure 2 A pressure sensor 211 and a temperature sensor 210 are set in the refrigeration system 2, which can timely detect the pressure of the refrigerant after being compressed by the compressor 201, and feed back the pressure to the control system, so that the control system can timely adjust the working state of the compressor 201. Specifically, when the pressure sensor 211 detects that the pressure of the compressed refrigerant is lower than the preset pressure value range, after feeding back the current pressure value to the control system, the control system can control the compressor 201 to increase the speed to increase the pressure value of the refrigerant. During this process, the pressure sensor 211 will continuously detect the pressure value of the compressed refrigerant. When the current pressure value is within the preset pressure value range, the control system stops increasing the speed of the compressor 201 and maintains the current working state. The temperature sensor 210 is used to detect the temperature of the refrigerant flowing out of the condenser 202. Its working principle is the same as that of the pressure sensor 211, which will not be repeated here.

[0065] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An air conditioner with waste heat recovery function, characterized in that: include: An indoor unit (1) having an air outlet (101) is used to absorb indoor air, perform heat exchange processing, and then discharge it back into the room to achieve indoor temperature regulation. The indoor unit (1) comprises a coil (102) and a first fan (103), wherein the first fan (103) is arranged on one side of the coil (102); A refrigeration system (2) for performing heat exchange with air entering the indoor unit (1); An outdoor unit (3), the refrigeration system (2) is arranged in the outdoor unit (3), and the outdoor unit (3) is connected to the indoor unit (1) via a pipeline; An auxiliary heating system (4) is arranged in the outdoor unit (3) and is connected to the coil (102).

2. The air conditioner with waste heat recovery function according to claim 1, characterized in that: The refrigeration system (2) comprises a compressor (201), a condenser (202), an electronic expansion valve (203), and a first heat exchanger (204), which are connected in sequence through pipelines to form a loop.

3. The air conditioner with waste heat recovery function according to claim 1, characterized in that: The refrigeration system (2) comprises a compressor (201), a condenser (202), a solenoid valve (207), a capillary tube (208), and a first heat exchanger (204), which are connected in sequence through pipelines to form a loop.

4. The air conditioner with waste heat recovery function according to claim 2 or 3, characterized in that: The auxiliary heat system (4) comprises a second heat exchanger (401), which is arranged on one side of the condenser (202) and is used to absorb heat from the condenser (202). The second heat exchanger (401) is connected to the coil (102).

5. The air conditioner with waste heat recovery function according to claim 4, characterized in that: The auxiliary heat system (4) further comprises a heating element (402) connected in series with the second heat exchanger (401).

6. The air conditioner with waste heat recovery function according to claim 4, characterized in that: The refrigeration system further comprises a second fan (205) and a third fan (206), wherein the second fan (205) is arranged on one side of the first heat exchanger (204), and the third fan (206) is arranged on one side of the condenser (202).

7. The air conditioner with waste heat recovery function according to claim 4, characterized in that: Also includes: a first three-way valve (5), wherein the inlet end of the coil (102) is respectively connected to the outlet of the first heat exchanger (204) and the outlet of the second heat exchanger (401) through the first three-way valve (5); A second three-way valve (6), wherein the outlet end of the coil (102) is connected to the inlet of the first heat exchanger (204) and the inlet of the second heat exchanger (401) respectively through the second three-way valve (6).

8. The air conditioner with waste heat recovery function according to claim 1, characterized in that: Also includes: A control system is arranged in the indoor unit (1), and the control system is electrically connected to the refrigeration system (2) and the auxiliary heating system (4).

9. The air conditioner with waste heat recovery function according to claim 2, characterized in that: The refrigeration system (2) further comprises a filter (209), wherein the filter (209) is arranged in series in a pipeline between the condenser (202) and the electronic expansion valve (203).

10. The air conditioner with waste heat recovery function according to claim 9, characterized in that: The refrigeration system (2) further comprises a temperature sensor (210) and a pressure sensor (211); the temperature sensor (210) is arranged in series with the pipeline between the condenser (202) and the filter (209); and the pressure sensor (211) is arranged in series with the pipeline between the compressor (201) and the condenser (202).

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