Multi-temperature-zone air supply automobile air conditioner based on air mixing and control method of multi-temperature-zone air supply automobile air conditioner

Abstract

The invention discloses a multi-temperature-zone air supply automobile air conditioner based on air mixing and a control method of the multi-temperature-zone air supply automobile air conditioner, and belongs to the technical field of automobile air conditioners. Comprising a frequency conversion compressor, a four-way reversing valve, an outdoor heat exchanger, a heat regenerator, a throttling device, an indoor heat exchanger and a liquid storage device which are connected through pipelines. A fan is arranged at an inlet of the second indoor heat exchanger; and air generated by the fan can sequentially flow through the second indoor heat exchanger and the first indoor heat exchanger and is fed into each air conditioner air supply outlet. Air doors are arranged in the air supply ducts and used for distributing supplied air at different temperatures in the air ducts. Through the double-heat-exchanger structure, air supply at three different temperatures is achieved at the inlet, the outlet and the middle section of the heat exchanger; by controlling the opening degree of each air door in each air duct, supplied air at each temperature is mixed according to different proportions, so that multi-temperature air supply is realized, electric heating is replaced, energy waste is reduced, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile air conditioners, and relates to a multi-temperature zone air supply automobile air conditioner based on mixed air and a control method thereof. Background Art

[0002] Due to the environmental pollution and fossil energy shortage caused by the current large-scale use of fuel vehicles, the use and promotion of electric vehicles is a powerful tool to promote energy conservation and emission reduction and achieve the "dual carbon" goal. Since electric vehicles use batteries as a power source and there is no engine waste heat to use, the independent heat pump air conditioning system has become an indispensable part of electric vehicles.

[0003] Ordinary air conditioning systems use a single air supply, and the air supply parameters for each air outlet in the car are consistent. Such an air supply air path has a simple structure and is stable and reliable to use. However, from the perspective of occupant thermal comfort, due to the unevenness of the thermal environment in the car and the differences in the physiological requirements of different passengers for thermal environment comfort, it has become necessary to use independent air supply parameters for air outlets in different areas to achieve thermal comfort for each occupant in the car, improve the overall thermal comfort level of passengers, and achieve refined control of air supply. By adopting multi-temperature air supply and zoned air supply control for automobile air conditioners, different air supply can be provided to different passenger seating areas, thereby achieving different thermal environments and better adapting to the differentiated needs of different passengers for thermal comfort.

[0004] At present, the realization of multi-temperature air supply of automobile air conditioners is mainly through the form of air supply reheating, that is, the air at the outlet of the indoor heat exchanger is appropriately heated before being sent to each area, so as to control the air supply temperature to the required level. Although this method can achieve multi-temperature air supply regulation and the control is relatively accurate, there is a significant waste of cold energy in the form of cooling first and then heating, which reduces the efficiency of the entire zone air supply air conditioner.

[0005] Therefore, in order to improve energy utilization efficiency and minimize energy waste on the basis of achieving zoned air supply, it is necessary to improve the air supply form of air conditioning. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-temperature zone air supply automobile air conditioner based on mixed air and a control method thereof, so as to solve the technical problem that the multi-temperature air supply of automobile air conditioners in the prior art is mainly achieved through air reheating, resulting in energy waste and low energy utilization efficiency.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] In the first aspect, the present application provides a multi-temperature zone air supply automobile air conditioner based on mixed air, comprising a variable frequency compressor, an outdoor heat exchanger, a regenerator, a throttling device, a first indoor heat exchanger, a second indoor heat exchanger, a four-way reversing valve and a liquid reservoir connected by pipelines; the four interfaces of the four-way reversing valve are respectively connected to the variable frequency compressor, the outdoor heat exchanger, the regenerator and the liquid reservoir; the outdoor heat exchanger and the regenerator are also directly connected by a pipeline; the inlet of the variable frequency compressor is also directly connected to the outlet of the liquid reservoir by a pipeline; The heat exchanger is respectively connected to the throttling device and the second indoor heat exchanger, and the outlet of the throttling device is connected to the first indoor heat exchanger; a fan is arranged at the inlet of the second indoor heat exchanger; the wind generated by the fan can flow through the second indoor heat exchanger and the first indoor heat exchanger in sequence and be delivered to the air supply outlet of the air conditioner; the air supply outlet of the air conditioner has several parts, all of which are connected with the air inlet pipe of the second indoor heat exchanger, the air outlet pipe of the second indoor heat exchanger and the air outlet pipe of the first indoor heat exchanger; the fan, the variable frequency compressor and the four-way reversing valve are all connected to the electronic control unit.

[0009] Furthermore, the air-conditioning air supply outlet comprises a first air supply outlet, a second air supply outlet and a third air supply outlet; a part of the air generated by the fan enters the second indoor heat exchanger, and the other part flows to the air-conditioning air supply outlet through the first air door; the wind flowing to the air-conditioning air supply outlet is split through the sixth air door, a part of which enters the third air supply outlet, and the other part flows to the second air supply outlet; the wind entering the second indoor heat exchanger flows out from the air outlet of the second indoor heat exchanger after heat exchange, a part of which enters the first indoor heat exchanger, and the other part flows into the air-conditioning air supply outlet through the second air door; the wind flowing into The wind from the air supply outlet of the air conditioner is split through the fifth air gate, with one part entering the third air supply outlet and the other part flowing to the second air supply outlet; the wind entering the first indoor heat exchanger flows out from the air outlet of the first indoor heat exchanger after heat exchange, with one part directly entering the first air supply outlet and the other part flowing to the second and third air supply outlets through the third air gate, and a fourth air gate is set at the split point to control the specific air volume flowing into the second and third air supply outlets; the first air gate, the second air gate, the third air gate, the fourth air gate, the fifth air gate and the sixth air gate are all connected to the electronic control unit.

[0010] Furthermore, a first temperature sensor is installed at the air inlet of the second indoor heat exchanger; a second temperature sensor is installed at the air outlet of the second indoor heat exchanger; a third temperature sensor is installed at the air outlet of the first indoor heat exchanger; the first temperature sensor, the second temperature sensor and the third temperature sensor are all connected to the electronic control unit.

[0011] Furthermore, a fourth temperature sensor is installed at the first air supply outlet; and a fifth temperature sensor is installed at the second air supply outlet.

[0012] Furthermore, a sixth temperature sensor is installed at the third air supply outlet; the fourth temperature sensor, the fifth temperature sensor and the sixth temperature sensor are all connected to the electronic control unit.

[0013] Furthermore, the electronic control unit is also connected to a control panel; the control panel is used to input the set value signals of the air supply volume and air supply temperature of each area, and transmit them to the electronic control unit.

[0014] Furthermore, the fan is a variable frequency fan.

[0015] In a second aspect, the present invention provides a control method for the above-mentioned multi-temperature zone air supply automobile air conditioner based on mixed air, comprising the following steps:

[0016] The target temperature of each area and the air supply volume of each area input by the user are read through the control panel and sent to the electronic control unit; the electronic control unit receives the temperature sensor signal, calculates the air volume of each temperature supply required for each air supply, and controls the opening of the first air door, the second air door and the third air door according to the obtained air volume ratio, thereby controlling the air outlet diversion ratio of each temperature at the second indoor heat exchanger inlet, the second indoor heat exchanger outlet and the first indoor heat exchanger outlet section, and controlling the opening of the fourth air door, the fifth air door and the sixth air door according to the air supply volume of each temperature section required for the air supply of each area, thereby controlling the air supply division ratio of each temperature, and mixing the divided air supply of each temperature in proportion at each air supply outlet, thereby realizing air supply with different temperatures and air volumes.

[0017] Furthermore, the calculation of the air volume ratio includes the following steps:

[0018] For each air supply route to the passenger compartment, the electronic control unit receives the control panel's information on the air volume Q of the air supply route. i And the supply air temperature setting value T i signal, and receives the temperature sensor signal to obtain the second indoor heat exchanger inlet air temperature T in , the second indoor heat exchanger outlet air temperature T mid and the first indoor heat exchanger outlet air temperature T out , compare the supply air temperature setting value T i With T in 、T out and T mid The required ratio of inlet and outlet air of each heat exchanger is calculated.

[0019] When the system is in cooling mode:

[0020]

[0021] Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air;

[0022] When the system is in heating mode:

[0023]

[0024] Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air;

[0025] Multiply the obtained mixed air ratio by the air supply volume Q of the route i , determine the required inlet and outlet air volume of each heat exchanger, the specific calculation formula is:

[0026]

[0027] In the formula, Q in,i is the inlet air volume of the second indoor heat exchanger; Q mid,i is the outlet air volume of the second indoor heat exchanger; is the outlet air volume of the first indoor heat exchanger.

[0028] Furthermore, the calculation method of the opening degrees of the first damper, the second damper, the third damper, the fourth damper, the fifth damper and the sixth damper is:

[0029] According to the required ratio of the inlet air of the second indoor heat exchanger to the total air volume, the opening d1 of the first damper is determined. The specific calculation formula is:

[0030]

[0031] According to the required ratio of the first heat exchanger outlet air and the second indoor heat exchanger outlet air to the total air volume, the opening d2 of the second air door is determined. The specific calculation formula is:

[0032]

[0033] According to the ratio of the air volume at the outlet of the first heat exchanger required for air supply at the first air supply port to the total air volume at the outlet of the first heat exchanger, the opening d3 of the third air door is determined. The specific calculation formula is:

[0034]

[0035] In the formula, Q out,1 The air volume at the outlet of the first heat exchanger required for air supply at the first air supply outlet;

[0036] The opening degree d4 of the fourth air door is determined according to the ratio of the total air volume of the first heat exchanger outlet required for air supply at the second air supply outlet and the third air supply outlet. The specific calculation formula is:

[0037]

[0038] In the formula, Q out,2 Q is the air volume at the outlet of the first heat exchanger required for air supply at the second air supply outlet; out,3 The air volume at the outlet of the first heat exchanger required for air supply at the third air supply outlet;

[0039] The opening degree d5 of the fifth air door is determined according to the ratio of the air volume at the outlet of the second indoor heat exchanger required for air supply at the second air supply outlet and air supply at the third air supply outlet. The specific calculation formula is:

[0040]

[0041] In the formula, Q mid,2 Q is the air volume at the outlet of the second heat exchanger required for air supply at the second air supply outlet; mid,3 The air volume at the outlet of the second heat exchanger required for air supply at the third air supply outlet;

[0042] The opening degree d6 of the sixth damper is determined according to the ratio of the air volume of the second indoor heat exchanger inlet required for air supply at the second air supply outlet and air supply at the third air supply outlet. The specific calculation formula is:

[0043]

[0044] In the formula, Q in,2 Q is the air volume of the second heat exchanger inlet required for air supply at the second air supply outlet; in,3 The second heat exchanger inlet air volume required for air supply at the third air supply outlet.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention discloses a multi-temperature zone air supply automobile air conditioner based on mixed air and a control method thereof, wherein the wind generated by the fan can flow through the second indoor heat exchanger and the first indoor heat exchanger in sequence, and be delivered into the vehicle through a plurality of air supply vents of the air conditioner. The two indoor heat exchangers can adjust the temperature independently, and can provide air of different temperatures according to the needs of different passengers; the target value of the outlet air temperature of the first indoor heat exchanger is the minimum air supply temperature of each zone in the cooling mode; and the maximum air supply temperature of each zone in the heating mode. The present invention obtains three different air supply temperatures at the inlet, outlet, and middle section of the heat exchanger through a dual heat exchanger structure; by controlling the opening of each damper in each air duct, the air supply of each temperature is mixed in different proportions, thereby realizing multi-temperature air supply; the secondary heating process is omitted, so that the cooling capacity of the refrigeration system matches the cooling capacity required for air supply, thereby improving energy utilization efficiency and reducing energy waste. Calculation and analysis of the electric vehicle zoned air conditioning and air supply system provided by the present invention under typical operating conditions show that compared with electric heating, its energy consumption can be reduced by about 15% to 35% under the same conditions. It has significant economic and environmental benefits, and has made significant contributions to environmental protection, alleviating the fossil energy crisis, and achieving carbon peak and carbon neutrality. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 It is a structural schematic diagram of a multi-temperature zone air supply automobile air conditioner based on mixed air according to the present invention;

[0049] Figure 2 This is a schematic diagram of the signal receiving control of the electronic control unit of the present invention.

[0050] Wherein: 1. variable frequency compressor; 2. outdoor heat exchanger; 3. regenerator; 4. throttling device; 51. first indoor heat exchanger; 52. second indoor heat exchanger; 6. four-way reversing valve; 7. liquid storage tank; 8. variable frequency fan; 91. first damper; 92. second damper; 93. third damper; 94. fourth damper; 95. fifth damper; 96. sixth damper; 101. first air supply outlet; 102. second air supply outlet; 103. third air supply outlet; 111. first temperature sensor; 112. second temperature sensor; 113. third temperature sensor; 114. fourth temperature sensor; 115. fifth temperature sensor; 116. sixth temperature sensor; 12. electronic control unit; 13. control panel. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0058] See also Figure 1 The embodiment of the present invention discloses a multi-temperature zone air supply automobile air conditioner based on mixed air, comprising a variable frequency compressor 1, an outdoor heat exchanger 2, a regenerator 3, a throttling device 4, a first indoor heat exchanger 51, a second indoor heat exchanger 52, a four-way reversing valve 6 and a liquid reservoir 7 connected by pipelines; four interfaces of the four-way reversing valve 6 are respectively connected to the variable frequency compressor 1, the outdoor heat exchanger 2, the regenerator 3 and the liquid reservoir 7; the regenerator 3 is respectively connected to the throttling device 4 and the second indoor heat exchanger 52, and the outlet of the throttling device 4 is connected to the The first indoor heat exchanger 51 is connected; a fan is arranged at the entrance of the second indoor heat exchanger 52; the wind generated by the fan can flow through the second indoor heat exchanger 52 and the first indoor heat exchanger 51 in sequence and be delivered to the air-conditioning air supply outlet; the air-conditioning air supply outlet has several parts, all of which are connected with the air inlet pipe of the second indoor heat exchanger 52, the air outlet pipe of the second indoor heat exchanger 52 and the air outlet pipe of the first indoor heat exchanger 51; the fan, the variable frequency compressor 1 and the four-way reversing valve 6 are all connected to the electronic control unit 12.

[0059] In a feasible implementation manner of the present invention, the air-conditioning air supply outlet includes a first air supply outlet 101 , a second air supply outlet 102 and a third air supply outlet 103 .

[0060] It should be noted that part of the wind generated by the fan enters the second indoor heat exchanger 52, and the other part flows to the air-conditioning outlet through the first damper 91; the wind flowing to the air-conditioning outlet is split through the sixth damper 96, part of which enters the third air outlet 103, and the other part flows to the second air outlet 102;

[0061] The wind entering the second indoor heat exchanger 52 flows out from the air outlet of the second indoor heat exchanger 52 after heat exchange, and a part of it enters the first indoor heat exchanger 51, and the other part flows into the air supply outlet of the air conditioner through the second air door 92; the wind flowing into the air supply outlet of the air conditioner is split by the fifth air door 95, and a part of it enters the third air supply outlet 103, and the other part flows to the second air supply outlet 102;

[0062] The air entering the first indoor heat exchanger 51 flows out from the air outlet of the first indoor heat exchanger 51 after heat exchange, with a part of it directly entering the first air supply port 101, and the other part of it flowing to the second air supply port 102 and the third air supply port 103 through the third air gate 93, and a fourth air gate 94 is set at the diversion point to control the specific air volume flowing into the second air supply port 102 and the third air supply port 103; the first air gate 91, the second air gate 92, the third air gate 93, the fourth air gate 94, the fifth air gate 95 and the sixth air gate 96 are all connected to the electronic control unit 12.

[0063] In a feasible embodiment of the present invention, a first temperature sensor 111 is installed at the air inlet of the second indoor heat exchanger 52; a second temperature sensor 112 is installed at the air outlet of the second indoor heat exchanger 52; a third temperature sensor 113 is installed at the air outlet of the first indoor heat exchanger 51; the first temperature sensor 111, the second temperature sensor 112 and the third temperature sensor 113 are all connected to the electronic control unit 12. A fourth temperature sensor 114 is installed at the first air outlet 101; a fifth temperature sensor 115 is installed at the second air outlet 102; a sixth temperature sensor 116 is installed at the third air outlet 103; the fourth temperature sensor 114, the fifth temperature sensor 115 and the sixth temperature sensor 116 are all connected to the electronic control unit 12.

[0064] In a possible embodiment of the present invention, see Figure 2 The electronic control unit 12 is also connected to a control panel 13 ; the control panel 13 is used to input the set value signals of the air supply volume and air supply temperature of each area and transmit them to the electronic control unit 12 .

[0065] In a feasible implementation manner of the present invention, the fan is preferably a variable frequency fan 8 .

[0066] The embodiment of the present invention discloses a control method for the above-mentioned multi-temperature zone air supply automobile air conditioner based on mixed air, comprising the following steps:

[0067] The target temperature of each area and the air supply volume of each area input by the user are read through the control panel 13 and sent to the electronic control unit 12; the electronic control unit 12 receives the temperature sensor signal, calculates the air supply volume of each temperature section required for each air supply, and controls the opening of the first air door 91, the second air door 92 and the third air door 93 according to the obtained air volume ratio, thereby controlling the air outlet diversion ratio of each temperature at the inlet of the second indoor heat exchanger 52, the outlet of the second indoor heat exchanger 52 and the outlet of the first indoor heat exchanger 51, and controlling the opening of the fourth air door 94, the fifth air door 95 and the sixth air door 96 according to the air supply volume of each temperature section required for the air supply of each area, thereby controlling the air supply division ratio of each temperature, and mixing the divided air supply of each temperature in proportion at each air supply port, thereby realizing air supply of different temperatures and air volumes.

[0068] It should be noted that, for each air supply route sent into the passenger compartment by the air supply system of this embodiment, the inlet and outlet air of the two internal heat exchangers (51-52) with slightly higher and lower temperatures are selected according to the target temperature for mixing. Exceptionally, the lowest temperature air supply in cooling mode and the highest temperature air supply in heating mode directly use the outlet air of the internal heat exchanger 51. The electronic control unit 12 can receive the air conditioning mode setting signal of the control panel 13, control the state of the four-way reversing valve 6, and realize the switching between cooling mode and heating mode. The outlet air temperature target value of the internal heat exchanger 51 is the minimum air supply temperature of each area in cooling mode; it is the maximum air supply temperature of each area in heating mode.

[0069] In a feasible implementation manner of the present invention, the calculation of the air volume ratio includes the following steps:

[0070] For each air supply route to the passenger compartment, the electronic control unit 12 receives information from the control panel 13 about the air volume Q of the air supply route. i And the supply air temperature setting value T i signal, and receives the temperature sensor signal to obtain the inlet air temperature T of the second indoor heat exchanger 52 in , the outlet air temperature of the second indoor heat exchanger 52 is T mid and the outlet air temperature T of the first indoor heat exchanger 51 out , compare the supply air temperature setting value T i With T in 、T out and T mid The required ratio of inlet and outlet air of each heat exchanger is calculated.

[0071] When the system is in cooling mode:

[0072]

[0073] Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air;

[0074] When the system is in heating mode:

[0075]

[0076] Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air;

[0077] Multiply the obtained mixed air ratio by the air supply volume Q of the route i , determine the required inlet and outlet air volume of each heat exchanger, the specific calculation formula is:

[0078]

[0079] In the formula, Q in,i Q is the inlet air volume of the second indoor heat exchanger 52; mid,i is the outlet air volume of the second indoor heat exchanger 52; is the outlet air volume of the first indoor heat exchanger 51.

[0080] Exceptionally, when T i When it is the minimum value among the target values ​​of the air supply temperature of each area or the maximum value in the heating mode, the air supply in this route uses the outlet air of the first indoor heat exchanger 51.

[0081] In a feasible embodiment of the present invention, the calculation method of the opening degree of the first damper 91, the second damper 92, the third damper 93, the fourth damper 94, the fifth damper 95 and the sixth damper 96 is:

[0082] The opening degree d1 of the first damper 91 is determined according to the required ratio of the inlet air of the second indoor heat exchanger 52 to the total air volume. The specific calculation formula is:

[0083]

[0084] The opening degree d2 of the second damper 92 is determined according to the required ratio of the outlet air of the first heat exchanger 51 and the outlet air of the second indoor heat exchanger 52 to the total air volume. The specific calculation formula is:

[0085]

[0086] The opening degree d3 of the third air door 93 is determined according to the ratio of the outlet air volume of the first heat exchanger 51 required for air supply at the first air supply port 101 to the total outlet air volume of the first heat exchanger 51. The specific calculation formula is:

[0087]

[0088] In the formula, Q out,1 The air volume at the outlet of the first heat exchanger 51 required for air supply at the first air supply port 101;

[0089] The opening degree d4 of the fourth air door 94 is determined according to the total air volume ratio of the first heat exchanger 51 outlet required for air supply at the second air supply port 102 and the third air supply port 103. The specific calculation formula is:

[0090]

[0091] In the formula, Q out,2 Q is the air volume at the outlet of the first heat exchanger 51 required for air supply at the second air supply port 102; out,3 The air volume at the outlet of the first heat exchanger 51 required for air supply at the third air supply port 103;

[0092] The opening degree d5 of the fifth air door 95 is determined according to the ratio of the air volume at the outlet of the second indoor heat exchanger 52 required for air supply at the second air supply port 102 and the air supply at the third air supply port 103. The specific calculation formula is:

[0093]

[0094] In the formula, Q mid,2 Q is the air volume at the outlet of the second heat exchanger 52 required for air supply at the second air supply port 102; mid,3 The air volume at the outlet of the second heat exchanger 52 required for air supply at the third air supply port 103;

[0095] The opening degree d6 of the sixth damper 96 is determined according to the ratio of the inlet air volume of the second indoor heat exchanger 52 required for the air supply at the second air supply port 102 and the air supply at the third air supply port 103. The specific calculation formula is:

[0096]

[0097] In the formula, Q in,2 The air volume of the inlet of the second heat exchanger 52 required for the air supply at the second air supply port 102; Q in,3 The inlet air volume of the second heat exchanger 52 required for air supply at the third air supply port 103 .

[0098] The working principle of the present invention is as follows:

[0099] The present invention comprises a refrigeration system consisting of a variable frequency compressor 1, an outdoor heat exchanger 2, a heat regenerator 3, a throttling device 4, a first indoor heat exchanger 51, a second indoor heat exchanger 52, a four-way reversing valve 6, and a liquid storage device 7; an air supply system consisting of a variable frequency fan 8, a first damper 91, a second damper 92, a third damper 93, a fourth damper 94, a fifth damper 95, a sixth damper 96, a first air supply port 101, a second air supply port 102, and a third air supply port 103, wherein the variable frequency fan 8 is connected to the first indoor heat exchanger 51 and the second indoor heat exchanger 52 of the refrigeration system, and the air supply ports 101-103 are connected to the corresponding areas of the passenger compartment; a first temperature sensor 111, a second temperature sensor 112, a third temperature sensor 113, a fourth temperature sensor 114, a fifth temperature sensor 115, and a sixth temperature sensor 116 are arranged in the air duct of the air supply system for detecting the wind temperature at each position;

[0100] An electronic control unit 12 and a control panel 13, wherein the control panel 13 is arranged in the passenger compartment and connected to the electronic control unit 12, and is used to input passenger setting data into the electronic control unit 12; the electronic control unit 12 is connected to the variable frequency compressor 1 of the refrigeration system, and controls the speed of the variable frequency compressor 1; the electronic control unit is connected to the four-way reversing valve 6, and controls the state of the four-way reversing valve 6; the electronic control unit 12 is connected to the variable frequency fan 8 of the air supply system and the dampers 91-96, and controls the speed of the variable frequency fan 8 and the opening of the dampers 91-96; the electronic control unit 12 is connected to the temperature sensors 111-116, and is used to receive temperature sensor data.

[0101] The refrigeration system uses carbon dioxide as a refrigerant, and realizes heat exchange with the air supply of the air supply system through the first indoor heat exchanger 51 and the second indoor heat exchanger 52; heat exchange is performed between the high-pressure section and the low-pressure section of the regenerator 3.

[0102] The air supply system generates supply air through the variable frequency fan 8, and is connected to the first indoor heat exchanger 5 and the second indoor heat exchanger 52 for heat exchange, and realizes multi-zone supply air temperature control through the intermediate air induction and mixing of the double heat exchangers. Part of the supply air is drawn out through the first air door 91 and the second air door 92 at the inlet, outlet and middle section of the double heat exchanger respectively, and the supply air of different temperatures is divided through the third air door 93, the fourth air door 94, the fifth air door 95 and the sixth air door 96. Finally, the required temperature supply air is obtained by mixing in proportion at the air supply ports 101-103 and delivered to the corresponding areas of the passenger compartment through the air supply ports 101-103.

[0103] The temperature sensors 111-116 are arranged at the air supply outlets 101-103 of each area and the outlet air duct of the first internal heat exchanger 51, the inlet air duct of the second heat exchanger 52 and the middle air duct of the indoor heat exchanger 51-52, and are used to detect the air temperature of each air supply outlet and the inlet and outlet and middle air supply of the internal heat exchanger, and send the detection results to the electronic control unit 12.

[0104] The electronic control unit 12 is used to determine the air temperature of each area according to the detection signals of the temperature sensors 111-116, and receive the signal of the control panel 13, input the control signal according to the preset control method, and realize the matching of the air supply temperature and air supply volume of each area with the target signal of the control panel by controlling the refrigeration system and the air supply system. The four-way reversing valve 6 is used to switch the working mode of the refrigeration system, and it has two states, corresponding to the cooling mode and the heating mode respectively.

[0105] The present invention adopts a multi-temperature air supply mixing method to obtain air supply at different temperatures, replacing electric heating, thereby reducing energy waste and improving energy utilization efficiency. The electric vehicle zoned air conditioning air supply system provided by the present invention is calculated and analyzed under typical working conditions. Compared with electric heating, its energy consumption can be reduced by about 15% to 35% under the same conditions, which has significant economic and environmental benefits, and has made significant contributions to environmental protection, alleviating the fossil energy crisis, and achieving carbon peak and carbon neutrality.

[0106] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-temperature zone air supply automobile air conditioner based on mixed air, characterized in that: The invention comprises a variable frequency compressor (1), an outdoor heat exchanger (2), a heat regenerator (3), a throttling device (4), a first indoor heat exchanger (51), a second indoor heat exchanger (52), a four-way reversing valve (6) and a liquid reservoir (7) connected by pipelines; the four interfaces of the four-way reversing valve (6) are respectively connected to the variable frequency compressor (1), the outdoor heat exchanger (2), the heat regenerator (3) and the liquid reservoir (7); the outdoor heat exchanger (2) and the heat regenerator (3) are also directly connected by pipelines; the inlet of the variable frequency compressor (1) is also directly connected to the outlet of the liquid reservoir (7) by pipelines; the heat regenerator (3) is respectively connected to the throttling device (4), and the outlet of the liquid reservoir (7) is also directly connected to the inlet of the variable frequency compressor (1). The throttling device (4) and the second indoor heat exchanger (52) are connected, and the outlet of the throttling device (4) is connected to the first indoor heat exchanger (51); a fan is arranged at the inlet of the second indoor heat exchanger (52); the wind generated by the fan can flow through the second indoor heat exchanger (52) and the first indoor heat exchanger (51) in sequence and be delivered to the air supply outlet of the air conditioner; the air supply outlet of the air conditioner has a plurality of air supply outlets, which are all connected to the air inlet pipe of the second indoor heat exchanger (52), the air outlet pipe of the second indoor heat exchanger (52) and the air outlet pipe of the first indoor heat exchanger (51); the fan, the variable frequency compressor (1) and the four-way reversing valve (6) are all connected to the electronic control unit (12).

2. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 1, characterized in that: The air-conditioning air supply outlet comprises a first air supply outlet (101), a second air supply outlet (102) and a third air supply outlet (103); part of the air generated by the fan enters the second indoor heat exchanger (52), and the other part flows to the air-conditioning air supply outlet through the first air door (91); the air flowing to the air-conditioning air supply outlet is split through the sixth air door (96), part of which enters the third air supply outlet (103), and the other part flows to the second air supply outlet (102); the air entering the second indoor heat exchanger (52) flows out from the air outlet of the second indoor heat exchanger (52) after heat exchange, part of which enters the first indoor heat exchanger (51), and the other part flows into the air-conditioning air supply outlet through the second air door (92); the air flowing into the air-conditioning air supply outlet is split through the fifth air door (95) The air flows into the first indoor heat exchanger (51), one part of which enters the third air supply port (103) and the other part of which flows to the second air supply port (102); the air entering the first indoor heat exchanger (51) flows out from the air outlet of the first indoor heat exchanger (51) after heat exchange, one part of which directly enters the first air supply port (101) and the other part of which flows to the second air supply port (102) and the third air supply port (103) through the third air gate (93); and a fourth air gate (94) is provided at the diversion point to control the specific air volume flowing into the second air supply port (102) and the third air supply port (103); the first air gate (91), the second air gate (92), the third air gate (93), the fourth air gate (94), the fifth air gate (95) and the sixth air gate (96) are all connected to the electronic control unit (12).

3. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 1, characterized in that: A first temperature sensor (111) is installed at the air inlet of the second indoor heat exchanger (52); a second temperature sensor (112) is installed at the air outlet of the second indoor heat exchanger (52); a third temperature sensor (113) is installed at the air outlet of the first indoor heat exchanger (51); the first temperature sensor (111), the second temperature sensor (112) and the third temperature sensor (113) are all connected to the electronic control unit (12).

4. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 3 is characterized in that: A fourth temperature sensor (114) is installed at the first air supply outlet (101); and a fifth temperature sensor (115) is installed at the second air supply outlet (102).

5. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 4, characterized in that: A sixth temperature sensor (116) is installed at the third air supply port (103); the fourth temperature sensor (114), the fifth temperature sensor (115) and the sixth temperature sensor (116) are all connected to the electronic control unit (12).

6. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 5, characterized in that: The electric control unit (12) is also connected to a control panel (13); the control panel (13) is used to input signals of air supply volume and air supply temperature setting values ​​for each area and transmit them to the electric control unit (12).

7. The multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 1, characterized in that: The fan is a variable frequency fan (8).

8. A control method for a multi-temperature zone air supply automobile air conditioner based on mixed air as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: The control panel (13) reads the target temperature of each area and the air supply volume of each area input by the user and sends them to the electronic control unit (12); the electronic control unit (12) receives the temperature sensor signal, calculates the air supply volume of each temperature section required for each air supply, and controls the opening of the first air door (91), the second air door (92) and the third air door (93) according to the obtained air volume ratio, thereby controlling the air outlet split ratio of each temperature at the inlet of the second indoor heat exchanger (52), the outlet of the second indoor heat exchanger (52) and the outlet of the first indoor heat exchanger (51); according to the air supply volume of each temperature section required for the air supply of each area, the opening of the fourth air door (94), the fifth air door (95) and the sixth air door (96) are controlled, thereby controlling the air supply division ratio of each temperature, and mixing the divided air supply of each temperature in each air supply port in proportion, thereby realizing air supply of different temperatures and air volumes.

9. The control method of a multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 8, characterized in that: The calculation of the air volume ratio comprises the following steps: For each air supply route to the passenger compartment, the electronic control unit (12) receives information from the control panel (13) about the air volume Q of the air supply route. i And the supply air temperature setting value T i signal, and receives the temperature sensor signal to obtain the inlet air temperature T of the second indoor heat exchanger (52) in , the outlet air temperature of the second indoor heat exchanger (52) T mid and the outlet air temperature T of the first indoor heat exchanger (51) out , compare the supply air temperature setting value T i With T in , T out and T mid The required ratio of inlet and outlet air of each heat exchanger is calculated. When the system is in cooling mode: Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air; When the system is in heating mode: Where x1 and x2 are the temperatures above T i and the temperature is lower than T i The ratio of the two mixed air; Multiply the obtained mixed air ratio by the air supply volume Q of the route i , determine the required inlet and outlet air volume of each heat exchanger, the specific calculation formula is: or In the formula, Q in,i Q is the inlet air volume of the second indoor heat exchanger (52); mid,i The outlet air volume of the second indoor heat exchanger (52); The outlet air volume of the first indoor heat exchanger (51).

10. The control method of a multi-temperature zone air supply automobile air conditioner based on mixed air according to claim 9, characterized in that: The calculation method of the opening degrees of the first damper (91), the second damper (92), the third damper (93), the fourth damper (94), the fifth damper (95) and the sixth damper (96) is: The opening degree d1 of the first air door (91) is determined according to the required ratio of the inlet air of the second indoor heat exchanger (52) to the total air volume. The specific calculation formula is: The opening degree d2 of the second air door (92) is determined based on the required ratio of the outlet air of the first heat exchanger (51) and the outlet air of the second indoor heat exchanger (52) to the total air volume. The specific calculation formula is: The opening degree d3 of the third air door (93) is determined according to the ratio of the air volume at the outlet of the first heat exchanger (51) required for air supply at the first air supply port (101) to the total air volume at the outlet of the first heat exchanger (51), and the specific calculation formula is: In the formula, Q out,1 The air volume at the outlet of the first heat exchanger (51) required for air supply at the first air supply port (101); The opening degree d4 of the fourth air door (94) is determined according to the ratio of the total air volume at the outlet of the first heat exchanger (51) required for air supply at the second air supply port (102) and air supply at the third air supply port (103). The specific calculation formula is: In the formula, Q out,2 is the air volume at the outlet of the first heat exchanger (51) required for air supply at the second air supply port (102); Q out,3 The air volume at the outlet of the first heat exchanger (51) required for air supply at the third air supply port (103); The opening degree d5 of the fifth air door (95) is determined based on the ratio of the air volume at the outlet of the second indoor heat exchanger (52) required for air supply at the second air supply port (102) and air supply at the third air supply port (103). The specific calculation formula is: In the formula, Q mid,2 The air volume at the outlet of the second heat exchanger (52) required for air supply at the second air supply port (102); Q mid,3 The air volume at the outlet of the second heat exchanger (52) required for supplying air at the third air supply port (103); The opening degree d6 of the sixth air door (96) is determined based on the ratio of the air volume of the second indoor heat exchanger (52) inlet required for air supply at the second air supply port (102) and air supply at the third air supply port (103). The specific calculation formula is: In the formula, Q in,2 The air volume at the inlet of the second heat exchanger (52) required for supplying air at the second air supply port (102); Q in,3 The inlet air volume of the second heat exchanger (52) required for air supply at the third air supply port (103).

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