Indoor air temperature adjusting system

Abstract

The invention relates to an indoor air temperature adjusting system. The indoor air temperature adjusting system comprises a compressor, an outdoor unit, a gas-liquid separator and an indoor unit assembly. The compressor is provided with a first air inlet, a second air inlet and an air outlet; an inlet of the outdoor unit is communicated with an air outlet of the compressor; the gas-liquid separator is provided with a gas-liquid phase inlet, a liquid phase outlet and a gas phase outlet, the gas-liquid phase inlet is communicated with an outlet of the outdoor unit, the liquid phase outlet is communicated with an inlet of the indoor unit assembly, and the gas phase outlet is communicated with the second gas inlet; an outlet of the indoor unit assembly communicates with the first air inlet. According to the invention, the refrigeration performance of the indoor air temperature adjusting system can be greatly improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical appliances, and particularly relates to an indoor air temperature regulation system. Background Art

[0002] For new refrigerants (such as R290, i.e., propane), the filling amount needs to be strictly controlled.

[0003] Currently, usually the condensation rate of the outdoor unit in the system is adjusted to an appropriate size so that the refrigerant flowing out of the outlet of the outdoor unit includes two phases, i.e., liquid phase and gas phase. The gas-phase refrigerant is used to fill the pipeline in the system to reduce the filling amount of the refrigerant. At the same time, to ensure that the latent heat of the refrigerant is fully utilized (i.e., the refrigerant flowing into the indoor unit is all in the liquid phase), a gas-liquid separator needs to be provided at the outlet position of the outdoor unit, and the liquid-phase outlet of the gas-liquid separator is connected to the inlet of the indoor unit.

[0004] In the above structure, the gas-phase outlet of the gas-liquid separator is usually connected to the inlet of the outdoor unit, that is, the gas-phase outlet of the gas-liquid separator is usually connected to the outlet of the compressor. After the refrigerant passes through the gas-liquid separator, the pressure will decrease, which causes a pressure difference between the outlet of the compressor and the gas-phase outlet. A part of the high-pressure gas-phase refrigerant flowing out of the outlet of the compressor will directly flow to the gas-phase outlet of the gas-liquid separator, resulting in a significant reduction in the refrigeration performance of the system. Summary of the Invention

[0005] Embodiments of the present disclosure provide an indoor air temperature regulation system, which can solve the technical problems existing in the related art. The technical solutions are as follows:

[0006] Embodiments of the present disclosure provide an indoor air temperature regulation system, which includes a compressor, an outdoor unit, a gas-liquid separator, and an indoor unit assembly;

[0007] The compressor has a first intake port, a second intake port, and an outlet port;

[0008] The inlet of the outdoor unit is connected to the outlet port of the compressor;

[0009] The gas-liquid separator has a gas-liquid phase inlet, a liquid-phase outlet, and a gas-phase outlet. The gas-liquid phase inlet is connected to the outlet of the outdoor unit, the liquid-phase outlet is connected to the inlet of the indoor unit assembly, and the gas-phase outlet is connected to the second intake port;

[0010] The outlet of the indoor unit assembly is connected to the first intake port.

[0011] In a possible implementation manner, the compressor includes a first cylinder block and a second cylinder block;

[0012] The first cylinder block has the first air inlet and the first air outlet;

[0013] The second cylinder block has the second air inlet and the second air outlet;

[0014] The inlet of the outdoor unit is communicated with the first air outlet and the second air outlet.

[0015] In a possible implementation manner, the indoor unit assembly includes a throttle valve and an indoor unit body;

[0016] The inlet of the throttle valve is communicated with the liquid phase outlet, and the outlet of the throttle valve is communicated with the inlet of the indoor unit body;

[0017] The outlet of the indoor unit body is communicated with the first air inlet.

[0018] In a possible implementation manner, the indoor air temperature regulation system further includes a first four-way valve and a second four-way valve;

[0019] The first four-way valve has a first interface, a second interface, a third interface, and a fourth interface. The first interface is communicated with the air outlet, the second interface is communicated with the inlet of the outdoor unit, the third interface is communicated with the first air inlet, and the fourth interface is communicated with the outlet of the indoor unit body;

[0020] The second four-way valve has a fifth interface, a sixth interface, a seventh interface, and an eighth interface. The fifth interface is communicated with the outlet of the outdoor unit, the sixth interface is communicated with the gas-liquid phase inlet, the seventh interface is communicated with the inlet of the indoor unit body, and the eighth interface is communicated with the outlet of the throttle valve.

[0021] In a possible implementation manner, the indoor air temperature regulation system further includes a controller;

[0022] The controller is electrically connected to the first four-way valve and the second four-way valve and is used for:

[0023] In the refrigeration working condition, controlling the first interface to be communicated with the second interface, controlling the third interface to be communicated with the fourth interface, controlling the fifth interface to be communicated with the sixth interface, and controlling the seventh interface to be communicated with the eighth interface;

[0024] In the heating working condition, controlling the first interface to be communicated with the fourth interface, controlling the second interface to be communicated with the third interface, controlling the fifth interface to be communicated with the eighth interface, and controlling the second interface to be communicated with the third interface.

[0025] In a possible implementation manner, the throttle valve is an electric control valve.

[0026] In a possible implementation, the indoor air temperature regulation system further includes a first connecting pipe, and the first connecting pipe includes a first connecting pipe body and an orifice plate;

[0027] Both ends of the first connecting pipe body are respectively communicated with the liquid phase outlet and the inlet of the indoor unit assembly;

[0028] The orifice plate is located inside the first connecting pipe body and is connected to the first connecting pipe body.

[0029] In a possible implementation, the indoor air temperature regulation system further includes a second connecting pipe, and the second connecting pipe includes a second connecting pipe body and a plurality of baffles;

[0030] Both ends of the second connecting pipe body are respectively communicated with the gas phase outlet and the second air inlet;

[0031] The plurality of baffles are all located inside the second connecting pipe body and are connected to the second connecting pipe body.

[0032] In a possible implementation, the gas-liquid separator has a separation chamber;

[0033] The side wall of the separation chamber is communicated with the gas-liquid phase inlet, the bottom of the separation chamber is communicated with the liquid phase outlet, and the top of the separation chamber is communicated with the gas phase outlet.

[0034] In a possible implementation, the separation chamber has a cylindrical structure.

[0035] In a possible implementation, the refrigerant used in the indoor air temperature regulation system is propane, and the refrigerant charge of the indoor air temperature regulation system is less than 700 g.

[0036] The technical solutions provided by the embodiments of the present disclosure at least include the following beneficial effects:

[0037] Embodiments of the present disclosure provide an indoor air temperature regulation system. In this system, the compressor has a first air inlet, a second air inlet, and an air outlet. The inlet of the outdoor unit is connected to the air outlet of the compressor. The gas-liquid separator has a gas-liquid phase inlet, a liquid phase outlet, and a gas phase outlet. The gas-liquid phase inlet is connected to the outlet of the outdoor unit. The liquid phase outlet is connected to the inlet of the indoor unit assembly. The gas phase outlet is connected to the second air inlet. The outlet of the indoor unit assembly is connected to the first air inlet. In this way, the gaseous refrigerant flowing out of the outlet of the indoor unit assembly and the gaseous refrigerant flowing out of the gas phase outlet of the gas-liquid separator will both enter the compressor first. After being compressed by the compressor, the pressures of these two paths of gaseous refrigerant are balanced and then enter the outdoor unit together through the inlet of the outdoor unit for condensation. Furthermore, all the gaseous refrigerant can flow into the outdoor unit, and the latent heat of all the gaseous refrigerant can be fully utilized, which can greatly improve the refrigeration performance of the indoor air temperature regulation system. At the same time, for this indoor air temperature regulation system, it can be realized that the inlet of the outdoor unit is all gaseous refrigerant, the outlet of the outdoor unit is partially gaseous refrigerant, and the other part is liquid refrigerant. Compared with the traditional indoor air temperature regulation system, this indoor air temperature regulation system greatly reduces the refrigerant density and refrigerant mass corresponding to the outlet of the outdoor unit. For the indoor air temperature regulation system, the refrigerant filling amount is mainly concentrated in the outdoor unit. Therefore, adopting the indoor air temperature regulation system of the present disclosure can greatly reduce the refrigerant filling amount. In addition, in this indoor air temperature regulation system, since part of the gaseous refrigerant at the outlet of the outdoor unit is still high-pressure gas, this part of the gaseous refrigerant returns to the suction port of the compressor through the gas phase outlet of the gas-liquid separator. The compressor only needs to spend very little compression work to make this part of the gaseous refrigerant return to the outdoor unit for heat exchange again, so it has the effect of energy saving and efficiency improvement.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0040] Figure 1 is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0041] Figure 2 is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0042] Figure 3 It is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0043] Figure 4 It is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0044] Figure 5 It is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0045] Figure 6 It is a schematic structural diagram of a gas-liquid separator shown in an embodiment of the present disclosure;

[0046] Figure 7 It is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure;

[0047] Figure 8 It is a schematic structural diagram of a gas-liquid separator shown in an embodiment of the present disclosure;

[0048] Figure 9 It is a schematic structural diagram of an indoor air temperature regulation system shown in an embodiment of the present disclosure.

[0049] Legend Explanation

[0050] 1. Compressor; 1a. First compressor unit; 1b. Second compressor unit;

[0051] 11. First air inlet; 12. Second air inlet; 13. Air outlet;

[0052] 131. First air outlet; 132. Second air outlet;

[0053] 110. First cylinder block; 120. Second cylinder block;

[0054] 2. Outdoor unit;

[0055] 3. Gas-liquid separator;

[0056] 31. Gas-liquid phase inlet; 32. Liquid phase outlet; 33. Gas phase outlet; 34. Separation chamber;

[0057] 4. Indoor unit assembly;

[0058] 41. Throttle valve; 42. Indoor unit body;

[0059] 5. First four-way valve;

[0060] 51. First interface; 52. Second interface; 53. Third interface; 54. Fourth interface;

[0061] 6. Second four-way valve;

[0062] 61. Fifth interface; 62. Sixth interface; 63. Seventh interface; 64. Eighth interface;

[0063] 7. First connecting pipe;

[0064] 71. First connecting pipe body; 72. Orifice plate;

[0065] 8. Second connecting pipe;

[0066] 81. Second connecting pipe body; 82. Baffle;

[0067] 001. Controller. Detailed implementation manners

[0068] To make the objectives, technical solutions and advantages of the present disclosure clearer, the following will further describe the implementation manners of the present disclosure in detail with reference to the accompanying drawings.

[0069] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure pertains. The terms "first", "second", "third" and similar terms used in the patent disclosure specification and claims of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0070] Nowadays, new refrigerants are gradually replacing traditional refrigerants due to their higher heat transfer efficiency and better environmental friendliness. Most new refrigerants are flammable (such as R290, etc.). Therefore, when using new refrigerants, it is necessary to strictly control the refrigerant charge. For example, in relevant standards, if R290 is applied to a household indoor air temperature regulation system, the refrigerant charge needs to be controlled below 334 grams. Currently, it is usually chosen to correspondingly adjust the condensation rate of the outdoor unit in the indoor air temperature regulation system to a specific value. At this value, a two-phase refrigerant flows out from the outlet position of the outdoor unit, that is, a liquid-phase refrigerant and a gas-phase refrigerant flow out from the outlet position of the outdoor unit. The gas-phase refrigerant is used to fill the pipelines in the system, so as to reduce the refrigerant charge in the indoor air temperature regulation system on the premise of ensuring the continuity of the refrigerant flow in the system. On this basis, to ensure that the latent heat of the refrigerant in the indoor unit is fully utilized, it is necessary to ensure that the refrigerant entering the indoor unit is all in the liquid phase (because the gas-phase refrigerant cannot undergo a phase change in the indoor unit, that is, it cannot absorb heat). For this reason, a gas-liquid separator needs to be set at the outlet of the outdoor unit, and the liquid-phase outlet of the gas-liquid separator is connected to the indoor unit.

[0071] In related technologies, as Figure 7 shown, after the liquid-phase refrigerant and the gas-phase refrigerant flowing out from the outlet of the outdoor unit enter the gas-liquid separator, they are separated into independent gas phase and liquid phase. The gas-phase outlet of the gas-liquid separator is connected to the outdoor unit, and the liquid-phase outlet of the gas-liquid separator is connected to the indoor unit. The liquid-phase refrigerant directly flows from the liquid-phase outlet to the indoor unit, while the gas-phase refrigerant directly flows from the gas-phase outlet to the outdoor unit. However, due to the flow separation effect of the gas-liquid separator, the pressure of the refrigerant will decrease after passing through the gas-liquid separator. That is to say, there is a pressure difference between the pressure at the gas-phase outlet of the gas-liquid separator and the pressure at the outlet of the compressor. The pressure at the gas-phase outlet of the gas-liquid separator is less than the pressure at the outlet of the compressor. This causes a part of the high-pressure gas-phase refrigerant flowing out from the outlet of the compressor to directly flow to the gas-phase outlet of the gas-liquid separator. The latent heat of the high-temperature and high-pressure gas-phase refrigerant cannot all flow to the outdoor unit, and the latent heat of part of the gas-phase refrigerant cannot be fully utilized, resulting in a significant reduction in the refrigeration performance of the system.

[0072] An embodiment of the present disclosure provides an indoor air temperature regulation system, which includes a compressor 1, an outdoor unit 2, a gas-liquid separator 3, and an indoor unit assembly 4.

[0073] Among them, the compressor 1 has a first air inlet 11, a second air inlet 12, and an air outlet 13. The inlet of the outdoor unit 2 is connected to the air outlet 13 of the compressor 1. The gas-liquid separator 3 has a gas-liquid phase inlet 31, a liquid phase outlet 32, and a gas phase outlet 33. The gas-liquid phase inlet 31 is connected to the outlet of the outdoor unit 2. The liquid phase outlet 32 is connected to the inlet of the indoor unit assembly 4. The gas phase outlet 33 is connected to the second air inlet 12. The outlet of the indoor unit assembly 4 is connected to the first air inlet 11.

[0074] In this way, the gaseous refrigerant flowing out of the outlet of the indoor unit assembly 4 and the gaseous refrigerant flowing out of the gas phase outlet 33 of the gas-liquid separator 3 will both first enter the compressor 1. After being compressed by the compressor 1, the pressures of these two paths of gaseous refrigerant are balanced and then enter the outdoor unit 2 through the inlet of the outdoor unit 2 for condensation. Furthermore, all the gaseous refrigerant can flow to the outdoor unit, and the latent heat of all the gaseous refrigerant can be fully utilized, which can greatly improve the refrigeration performance of the indoor air temperature regulation system. At the same time, for this indoor air temperature regulation system, it can be realized that the inlet of the outdoor unit 2 is all gaseous refrigerant, the outlet of the outdoor unit 2 is partially gaseous refrigerant, and the other part is liquid refrigerant. Compared with the traditional indoor air temperature regulation system, this indoor air temperature regulation system greatly reduces the refrigerant density and refrigerant mass corresponding to the outlet of the outdoor unit 2. And for the indoor air temperature regulation system, the refrigerant filling amount is mainly concentrated in the outdoor unit. Therefore, adopting the indoor air temperature regulation system of the present disclosure can greatly reduce the refrigerant filling amount. In addition, in this indoor air temperature regulation system, since part of the gaseous refrigerant at the outlet of the outdoor unit 2 is still high-pressure gas, this part of the gaseous refrigerant returns to the suction port 12 of the compressor 1 through the gas phase outlet 33 of the gas-liquid separator 3. The compressor 1 only needs to spend very little compression work to make this part of the gaseous refrigerant return to the outdoor unit 2 for heat exchange again, so it has the effect of energy saving and efficiency improvement.

[0075] Next, taking the refrigeration condition as an example, each component of the indoor air temperature regulation system will be introduced separately:

[0076] I. Compressor 1

[0077] The compressor 1 is a component in the indoor air temperature regulation system that compresses the gaseous refrigerant to increase the temperature and pressure of the gaseous refrigerant.

[0078] As Figure 1 shown, the compressor 1 has a first air inlet 11, a second air inlet 12, and an air outlet 13.

[0079] The first air inlet 11 of the compressor 1 is connected to the outlet of the indoor unit assembly 4, the second air inlet 12 is connected to the gas phase outlet 33 of the gas-liquid separator 3, and the air outlet 13 is connected to the inlet of the outdoor unit 2.

[0080] In implementation, the first air inlet 11 of the compressor 1 can be connected to the outlet of the indoor unit assembly 4 through a pipeline, the second air inlet 12 can be connected to the gas-phase outlet 33 of the gas-liquid separator 3 through a pipeline, and the air outlet 13 can be connected to the inlet of the outdoor unit 2 through a pipeline. The inner diameters of the above pipelines can be the same or different, and the embodiments of the present disclosure do not limit the inner diameters of the respective pipelines.

[0081] Under the refrigeration condition, the flow direction of the refrigerant in the system is as follows: The refrigerant flows from the compressor 1 to the outdoor unit 2, passes through the outdoor unit 2 and flows to the gas-liquid separator 3, and is divided into two paths in the gas-liquid separator 3. One path enters the first air inlet 11 of the compressor 1 after passing through the indoor unit assembly 4, and the other path directly flows to the second air inlet 12 of the compressor 1.

[0082] The compressor 1 includes a cylinder block and a piston. There is a piston cavity (both not shown) in the cylinder block. The piston is slidably connected to the piston cavity. When the piston moves, the low-temperature and low-pressure gas-phase refrigerant entering the piston cavity is compressed. The temperature of the compressed gas-phase refrigerant rises and flows from the air outlet of the compressor into the outdoor unit. During the process of the compressor 1 compressing the gas-phase refrigerant, energy is converted from electrical energy into the mechanical energy of the piston and then into the internal energy of the refrigerant.

[0083] In one example, the compressor 1 is a single-cylinder compressor.

[0084] As Figure 1 shown, the compressor 1 is a single-cylinder compressor, and the compressor 1 has a first air inlet 11 and a second air inlet 12.

[0085] In implementation, when the piston does not compress the gas-phase refrigerant in the piston cavity, the air pressure inside the compressor 1 is less than the pressure at the gas-phase outlet 33 and also less than the pressure at the outlet of the indoor unit assembly 4. The gas-phase refrigerant flows from the gas-phase outlet 33 and the outlet of the indoor unit assembly 4 to the compressor 1 respectively. Moreover, one-way baffles are provided at the positions of the first air inlet 11 and the second air inlet 12. The one-way baffles can prevent the gas-phase refrigerant from flowing back to the gas-phase outlet 33 and the outlet of the indoor unit assembly 4 when the pressure inside the compressor 1 rises, and maintain the stable flow direction of the refrigerant in the system.

[0086] In one example, the compressor 1 is a double-cylinder compressor.

[0087] As Figure 2 shown, the compressor 1 includes a first cylinder block 110 and a second cylinder block 120. The first cylinder block 110 has a first air inlet 11 and a first air outlet 131, the second cylinder block 120 has a second air inlet 12 and a second air outlet 132, and the first air outlet 131 and the second air outlet 132 are respectively connected to the inlet of the outdoor unit 2.

[0088] Among them, the compression stroke corresponding to the first air outlet 131 is greater than the compression stroke corresponding to the second air outlet 132.

[0089] In implementation, the pressure of the liquid-phase refrigerant decreases after flowing through the indoor unit assembly 4, that is, the pressure at the outlet of the indoor unit assembly 4 is less than the pressure at the gas-phase outlet 33. Making the compression stroke corresponding to the first air outlet 131 greater than the compression stroke corresponding to the second air outlet 132 can make the pressure increment of the gas-phase refrigerant compressed by the first cylinder block 110 greater than the pressure increment of the gas-phase refrigerant compressed by the second cylinder block 120, so that the pressures at the first air outlet 131 and the second air outlet 132 are equal, ensuring the stable flow direction of the refrigerant in the system.

[0090] Optionally, the compressor 1 can be a scroll compressor.

[0091] The scroll compressor has the characteristics of a smaller axial dimension and less noise. Compared with a piston compressor, choosing a scroll compressor can reduce the size of the outdoor unit after integrating the compressor 1, and at the same time can reduce the working noise of the outdoor unit when the indoor air temperature regulation system is working.

[0092] In a possible implementation manner, the compressor 1 includes a first compressor unit 1a and a second compressor unit 1b that are independent of each other.

[0093] As Figure 9 shown, the first compressor unit 1a has a first air inlet 11 and a first air outlet 131. The first air inlet 11 is connected to the outlet of the indoor unit assembly 4, and the first air outlet 131 is connected to the inlet of the outdoor unit 2. The second compressor unit 1b has a second air inlet 12 and a second air outlet 132. The second air inlet 12 is connected to the gas-phase outlet 33 of the gas-liquid separator 3, and the second air outlet 132 is connected to the inlet of the outdoor unit 2.

[0094] In this way, since the first compressor unit 1a and the second compressor unit 1b are independent of each other, the flexibility of their layout positions in the indoor air temperature regulation system is relatively high. Therefore, the flexibility of the layout positions of the components in the indoor air temperature regulation system can be improved.

[0095] In implementation, the pressure at the first air outlet 131 is equal to the pressure at the second air outlet 132.

[0096] In this way, it can be ensured that the gas-phase refrigerant flowing out of the first air outlet 131 and the gas-phase refrigerant flowing out of the second air outlet 132 do not have a cross-flow phenomenon, ensuring the stable flow direction of the refrigerant in the system.

[0097] II. Outdoor unit 2

[0098] Under the refrigeration condition, the outdoor unit 2 is a component that condenses the gaseous refrigerant in the indoor air temperature regulation system, that is, the outdoor unit 2 is a condenser.

[0099] As Figure 1 shown, the outdoor unit 2 has an inlet and an outlet.

[0100] The inlet of the outdoor unit 2 is connected to the outlet of the compressor 1, and the outlet of the outdoor unit 2 is connected to the gas-liquid inlet 31 of the gas-liquid separator 3.

[0101] In implementation, the condensation rate of the outdoor unit 2 can be controlled according to actual needs. In the case where the condensation rate is 100%, all the gaseous refrigerant is condensed into liquid refrigerant after passing through the outdoor unit 2. In the scenario of applying new refrigerants, since it is necessary to reduce the refrigerant filling amount, therefore, the rotation speed of the fan in the outdoor unit can be adjusted to adjust the air volume for heat exchange with the condenser, or, by controlling the heat exchange area of the heat exchanger in the outdoor unit, or, by controlling the corresponding opening degree of the electric control valve in the outdoor unit, the condensation rate is adjusted to an appropriate size, so that part of the gaseous refrigerant is condensed into liquid refrigerant after passing through the outdoor unit 2, and the remaining part is still gaseous refrigerant. This part of the gaseous refrigerant can fill the pipes in the outdoor unit 2, thereby reducing the filling amount of the indoor air temperature regulation system on the premise of ensuring the continuity of refrigerant flow in the system.

[0102] The inlet of the outdoor unit 2 and the outlet of the compressor 1 can be connected through a pipe, and the outlet of the outdoor unit 2 and the gas-liquid inlet 31 of the gas-liquid separator 3 can be connected through a pipe. The inner diameters of the above pipes can be the same or different, and the embodiments of the present disclosure do not limit the inner diameters of the respective pipes.

[0103] The gaseous refrigerant flows to the outdoor unit 2 after being compressed by the compressor 1. In the outdoor unit 2, the high-temperature and high-pressure gaseous refrigerant exchanges heat with the outside world, and then the gaseous refrigerant undergoes a phase change, and part of it becomes liquid refrigerant. During this process, the refrigerant releases heat.

[0104] In implementation, taking the refrigeration condition as an example, the outdoor unit 2 can be integrated into the outdoor unit chassis. The gaseous refrigerant in the outdoor unit 2 is liquefied into liquid refrigerant, and heat is released to the outside during this process. In addition, a fan can also be integrated in the outdoor unit chassis, and the air outlet direction of the fan is arranged opposite to the outdoor unit 2. This fan can be used to quickly diffuse the heat dissipated during the process of liquefying the gaseous refrigerant into liquid refrigerant to the outside.

[0105] In one example, as Figure 2As shown, the compressor 1 in the system is a twin-cylinder compressor. In this case, the outdoor unit 2 can be correspondingly provided with two inlets, or only one inlet. When the outdoor unit 2 is correspondingly provided with two inlets, one inlet can be connected to the first outlet 131 through a pipeline, and the other inlet can be connected to the second outlet 132 through a pipeline. When the outdoor unit 2 is only provided with one inlet, this inlet can be connected to one end of the pipeline, and the first outlet 131 and the second outlet 132 can both be connected to the other end of the pipeline.

[0106] In this way, the connection convenience between the compressor 1 and the outdoor unit 2 can be improved.

[0107] In some possible embodiments, the refrigerant used in the indoor air temperature regulation system is propane (i.e., R290), and the refrigerant charge of the indoor air temperature regulation system is less than 700 g.

[0108] In this way, since R290 has higher heat transfer efficiency and better environmental friendliness, the overall heat exchange efficiency and environmental performance of the indoor air temperature regulation system can be improved. In addition, since R290 is flammable, limiting the charge of R290 in the indoor air temperature regulation system to less than 700 g can ensure good safety performance of the indoor air temperature regulation system.

[0109] III. Gas-liquid separator 3

[0110] The gas-liquid separator 3 is a component that separates the gaseous refrigerant and the liquid refrigerant in the indoor air temperature regulation system.

[0111] As Figure 1 shown, the gas-liquid separator 3 has a gas-liquid phase inlet 31, a liquid phase outlet 32, and a gas phase outlet 33.

[0112] The gas-liquid phase inlet 31 of the gas-liquid separator 3 is connected to the outlet of the outdoor unit 2, the liquid phase outlet 32 is connected to the inlet of the indoor unit assembly 4, and the gas phase outlet 33 is connected to the second inlet 12 of the compressor 1.

[0113] In implementation, the gas-liquid phase inlet 31 and the outlet of the outdoor unit 2 can be connected through a pipeline, the liquid phase outlet 32 and the inlet of the indoor unit assembly 4 can be connected through a pipeline, and the gas phase outlet 33 and the second inlet 12 of the compressor 1 can be connected through a pipeline. The inner diameters of the above pipelines can be the same or different, and the present disclosure embodiments do not limit the inner diameters of each pipeline.

[0114] As Figure 6 shown, the gas-liquid separator 3 has a separation chamber 34 inside. The side wall of the separation chamber 34 is connected to the gas-liquid phase inlet 31, the bottom of the separation chamber 34 is connected to the liquid phase outlet 32, and the top of the separation chamber 34 is connected to the gas phase outlet 33.

[0115] In implementation, the gas-liquid two-phase refrigerant flows out from the outlet of the outdoor unit 2, and successively enters the separation chamber 34 through the pipeline and the gas-liquid inlet 31 of the gas-liquid separator 3. The gas-liquid two-phase refrigerant flows along the side wall of the separation chamber 34 in the separation chamber 34, and the gas-phase refrigerant and the liquid-phase refrigerant are separated. Subsequently, the gas-phase refrigerant flows towards the top of the chamber and leaves the gas-liquid separator 3 through the gas-phase outlet 33. Correspondingly, the liquid-phase refrigerant flows towards the bottom of the chamber and leaves the gas-liquid separator 3 through the liquid-phase outlet 32.

[0116] In one example, the separation chamber 34 has a cylindrical structure.

[0117] In this way, when the gas-liquid two-phase refrigerant flows on the side wall of the separation chamber 34, the flow field of the refrigerant can be stabilized, and the separation efficiency of the gas-phase refrigerant and the liquid-phase refrigerant can be improved.

[0118] Optionally, as Figure 6 shown, the bottom of the separation chamber 34 and the liquid-phase outlet 32 are in an inclined transition.

[0119] In this way, excessive liquid-phase refrigerant staying in the gas-liquid separator 3 can be avoided, and thus the refrigerant charge amount can be further reduced.

[0120] Optionally, as Figure 8 shown, the axis of the gas-liquid inlet 31 is perpendicular to the axis of the above-mentioned cylindrical structure and extends along the tangent of the side wall of the cylindrical structure.

[0121] In this way, splashing can be avoided when the gas-liquid two-phase refrigerant contacts the side wall of the separation chamber 34, and further, the separation efficiency of the gas-phase refrigerant and the liquid-phase refrigerant can be improved.

[0122] IV. Indoor unit assembly 4

[0123] Under the refrigeration condition, the indoor unit assembly 4 is a component for throttling and evaporating the liquid-phase refrigerant in the indoor air temperature regulation system, that is, the indoor unit assembly 4 is an evaporator integrated with a throttling function.

[0124] As Figure 1 shown, the indoor unit assembly 4 has an inlet and an outlet.

[0125] The inlet of the indoor unit assembly 4 is communicated with the liquid-phase outlet 32 of the gas-liquid separator 3, and the outlet of the indoor unit assembly 4 is communicated with the first intake port 11 of the compressor 1.

[0126] The inlet of the indoor unit assembly 4 and the liquid-phase outlet 32 of the gas-liquid separator 3 can be communicated through a pipeline, and the outlet of the indoor unit assembly 4 and the first intake port 11 of the compressor 1 can be communicated through a pipeline. The inner diameters of the above-mentioned pipelines can be the same or different, and the embodiments of the present disclosure do not limit the inner diameters of the respective pipelines.

[0127] After the gas-liquid two-phase refrigerant passes through the gas-liquid separator 3, the gaseous refrigerant and the liquid refrigerant are separated from each other. The low-temperature liquid refrigerant flows through the liquid outlet 32 to the indoor unit assembly 4. In the indoor unit assembly 4, the low-temperature and low-pressure liquid refrigerant exchanges heat with the outside. Subsequently, the liquid refrigerant undergoes a phase change, and all the liquid refrigerant changes into gaseous refrigerant. During this process, the refrigerant absorbs heat.

[0128] In implementation, taking the refrigeration condition as an example, the indoor unit assembly 4 is integrated into the indoor unit at this time. The indoor unit assembly 4 throttles the liquid refrigerant coming from the liquid outlet 32. After throttling, the temperature and pressure of the liquid refrigerant both decrease. And, inside the indoor unit assembly 4, the liquid refrigerant evaporates into gaseous refrigerant. This process absorbs heat from the outside, and the temperature of the ambient gas decreases. Therefore, a blower can be integrated in the indoor unit, and the air outlet direction of the blower can be set to be arranged opposite to the indoor unit assembly 4. The blower blows out the cooled gas from the indoor unit, thereby cooling the indoor environment.

[0129] In one example, the indoor unit assembly 4 includes a throttle valve 41 and an indoor unit body 42.

[0130] As Figure 3 shown, the inlet of the throttle valve 41 is connected to the liquid outlet 32 through a pipeline, and the outlet of the throttle valve 41 is connected to the inlet of the indoor unit body 42 through a pipeline.

[0131] In implementation, the liquid refrigerant flows from the liquid outlet 32 to the throttle valve 41. After the throttling effect of the throttle valve 41, the temperature and pressure of the liquid refrigerant both decrease. The low-temperature and low-pressure liquid refrigerant flows to the indoor unit body 42 and evaporates in the indoor unit body 42 to complete the heat exchange with the outdoor unit.

[0132] Optionally, the throttle valve 41 is an electric control valve.

[0133] In this way, the throttle valve 41 can adjust the opening degree according to the actual operating conditions of each component, so that the evaporator always has a relatively high superheat degree.

[0134] The throttle valve 41 can be a needle-shaped throttle valve, a groove-shaped throttle valve, or a window-type throttle valve. The embodiments of the present disclosure do not limit the type of the throttle valve 41.

[0135] Next, some optional structural features of the air temperature regulation system will be introduced:

[0136] Structural Feature 1. The indoor air temperature regulation system further includes a first four-way valve 5 and a second four-way valve 6.

[0137] As Figure 4As shown in the figure, the first four-way valve 5 has a first interface 51, a second interface 52, a third interface 53, and a fourth interface 54. The first interface 51 is communicated with the air outlet 13, the second interface 52 is communicated with the inlet of the outdoor unit 2, the third interface 53 is communicated with the first air inlet 11, and the fourth interface 54 is communicated with the outlet of the indoor unit body 42. The second four-way valve 6 has a fifth interface 61, a sixth interface 62, a seventh interface 63, and an eighth interface 64. The fifth interface 61 is communicated with the outlet of the outdoor unit 2, the sixth interface 62 is communicated with the gas-liquid inlet 31, the seventh interface 63 is communicated with the inlet of the indoor unit body 42, and the eighth interface 64 is communicated with the outlet of the throttle valve 41.

[0138] The interfaces of the first four-way valve 5 and the interfaces of the second four-way valve 6 described above can all be communicated with the interfaces of various components in the system through pipelines. In the embodiments of the present disclosure, the inner diameters and lengths of the pipelines are not limited.

[0139] As Figure 4 and Figure 5 shown, the indoor air temperature adjustment system further includes a controller 001.

[0140] Referring to Figure 4 and Figure 5 , the controller 001 is electrically connected to the first four-way valve 5 and the second four-way valve 6. The controller 001 is configured to, under the refrigeration condition, control the first interface 51 to be communicated with the second interface 52, control the third interface 53 to be communicated with the fourth interface 54, control the fifth interface 61 to be communicated with the sixth interface 62, and control the seventh interface 63 to be communicated with the eighth interface 64; under the heating condition, control the first interface 51 to be communicated with the fourth interface 54, control the second interface 52 to be communicated with the third interface 53, control the fifth interface 61 to be communicated with the eighth interface 64, and control the second interface 52 to be communicated with the third interface 53.

[0141] In practice, referring to Figure 4, under the refrigeration condition, the controller 001 controls the first four-way valve 5 and the second four-way valve 6. For the connection state, refer to the above text. The flow direction of the refrigerant in the system is as follows: The compressor 1 compresses the low-pressure gaseous refrigerant. The high-pressure and high-temperature gaseous refrigerant flows through the first interface 51 and the second interface 52 in sequence and then flows to the outdoor unit 2. The outdoor unit 2 acts as a condenser to condense the gaseous refrigerant to obtain a gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows through the outlet of the outdoor unit 2, the fifth interface 61 and the sixth interface 62 in sequence and then flows to the gas-liquid separator 3. After passing through the gas-liquid separator 3, the gas-liquid two-phase refrigerant is separated. Among them, the gaseous refrigerant flows through the gas-phase outlet 33 to the second intake port 12 of the compressor 1, and the liquid-phase refrigerant flows through the liquid-phase outlet 32 to the throttle valve 41. After passing through the throttle valve 41, the temperature and pressure of the liquid-phase refrigerant both decrease. Subsequently, it flows through the eighth interface 64 and the seventh interface 63 in sequence and then reaches the indoor unit body 42. The indoor unit body 42 acts as an evaporator to evaporate the liquid-phase refrigerant. The liquid-phase refrigerant is completely evaporated into gaseous refrigerant in the indoor unit body 42. The gaseous refrigerant flows through the outlet of the indoor unit body 42, the fourth interface 54 and the third interface 53 in sequence and then flows to the first intake port 11 of the compressor 1 to complete the cycle.

[0142] In implementation, refer to Figure 5 , under the heating condition, the controller 001 controls the first four-way valve 5 and the second four-way valve 6. For the connection state, refer to the above text. The flow direction of the refrigerant in the system is as follows: The compressor 1 compresses the low-pressure gaseous refrigerant. The high-pressure and high-temperature gaseous refrigerant flows through the first interface 51 and the fourth interface 54 in sequence and then flows to the indoor unit body 42. The indoor unit body 42 acts as a condenser to condense the gaseous refrigerant to obtain a gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows through the outlet, the seventh interface 63 and the sixth interface 62 in sequence and then reaches the gas-liquid separator 3. After passing through the gas-liquid separator 3, the gas-liquid two-phase refrigerant is separated. Among them, the gaseous refrigerant flows through the gas-phase outlet 33 to the second intake port 12 of the compressor 1, and the liquid-phase refrigerant flows through the liquid-phase outlet 32 to the throttle valve 41. After passing through the throttle valve 41, the temperature and pressure of the liquid-phase refrigerant both decrease. Subsequently, it flows through the eighth interface 64 and the fifth interface 61 in sequence and then flows to the outdoor unit 2. The outdoor unit 2 acts as an evaporator to evaporate the liquid-phase refrigerant. The liquid-phase refrigerant is completely evaporated into gaseous refrigerant in the indoor unit body 42. The gaseous refrigerant flows through the outlet of the indoor unit body 42, the second interface 52 and the third interface 53 in sequence and then flows to the first intake port 11 of the compressor 1 to complete the cycle.

[0143] In this way, whether in the refrigeration mode or in the heating mode, the gaseous refrigerant flowing out from the gas-phase outlet 33 of the gas-liquid separator 3 will directly flow into the second intake port 12 of the compressor 1. The gaseous refrigerant flowing out from the gas-phase outlet 33 can all enter the condenser (the outdoor unit 2 in the refrigeration mode and the indoor unit body 42 in the heating mode), and the latent heat of all the gaseous refrigerant can be fully utilized, which can greatly improve the refrigeration performance and heating performance of the indoor air temperature regulation system.

[0144] Structural feature two: The indoor air temperature regulation system further includes a first connecting pipe 7.

[0145] As Figure 6 shown, the first connecting pipe 7 includes a first connecting pipe body 71 and an orifice plate 72. The orifice plate 72 is located inside the first connecting pipe body 71 and is connected to the first connecting pipe body 71.

[0146] Refer to Figure 6 , the orifice plate 72 has a throttling orifice, and the shape and size of the throttling orifice can be set according to actual needs, and the embodiments of the present disclosure do not limit this.

[0147] In implementation, the two ends of the first connecting pipe body 71 are respectively communicated with the liquid-phase outlet 32 and the inlet of the indoor unit assembly 4.

[0148] In this way, by setting the first connecting pipe 7, the liquid-phase refrigerant flowing out from the liquid-phase outlet 32 can be throttled. When a small amount of gaseous refrigerant is doped in the liquid-phase refrigerant, the gaseous refrigerant in the liquid-phase refrigerant can be separated out, so as to ensure that the refrigerant flowing to the indoor unit assembly 4 is all in the liquid phase, and improve the refrigeration performance and heating performance of the indoor air temperature regulation system.

[0149] Structural feature three: The indoor air temperature regulation system further includes a second connecting pipe 8.

[0150] As Figure 6 shown, the second connecting pipe 8 includes a second connecting pipe body 81 and a plurality of baffles 82. The plurality of baffles 82 are all located inside the second connecting pipe body 81 and are connected to the second connecting pipe body 81.

[0151] In implementation, the two ends of the second connecting pipe body 81 are respectively communicated with the gas-phase outlet 33 and the second intake port 12.

[0152] In this way, when a small amount of liquid-phase refrigerant is doped in the gaseous refrigerant, the baffle 82 can block the liquid-phase refrigerant, so that the liquid-phase refrigerant flows back to the separation chamber 34, ensuring that the refrigerant flowing to the second intake port 12 of the compressor 1 is all in the gas phase, and improving the service life of the compressor 1.

[0153] Optionally, the second connecting pipe body 81 may be a circular pipe body, the baffle 82 may have a semi-circular structure, the radius of the baffle 82 is equal to the inner diameter of the second connecting pipe body 81, and a plurality of baffles 82 are alternately distributed on both sides of the axis of the second connecting pipe body 81.

[0154] In this way, the reflux efficiency of the liquid-phase refrigerant can be improved.

[0155] The technical solutions provided by the embodiments of the present disclosure at least include the following beneficial effects:

[0156] The embodiments of the present disclosure provide an indoor air temperature regulation system. In this system, the compressor 1 has a first air inlet 11, a second air inlet 12, and an air outlet 13. The inlet of the outdoor unit 2 is connected to the air outlet 13 of the compressor 1. The gas-liquid separator 3 has a gas-liquid phase inlet 31, a liquid phase outlet 32, and a gas phase outlet 33. The gas-liquid phase inlet 31 is connected to the outlet of the outdoor unit 2. The liquid phase outlet 32 is connected to the inlet of the indoor unit assembly 4. The gas phase outlet 33 is connected to the second air inlet 12. The outlet of the indoor unit assembly 4 is connected to the first air inlet 11. In this way, the gaseous refrigerant flowing out of the outlet of the indoor unit assembly 4 and the gaseous refrigerant flowing out of the gas phase outlet 33 of the gas-liquid separator 3 will both first enter the compressor 1. After being compressed by the compressor 1, the two paths of gaseous refrigerant enter the outdoor unit 2 through the inlet of the outdoor unit 2 for condensation after the pressure is balanced. Furthermore, all the gaseous refrigerant can flow to the outdoor unit, and the latent heat of all the gaseous refrigerant can be fully utilized, which can greatly improve the refrigeration performance of the indoor air temperature regulation system. At the same time, for this indoor air temperature regulation system, it can be realized that the inlet of the outdoor unit 2 is all gaseous refrigerant, the outlet of the outdoor unit 2 is partially gaseous refrigerant, and the other part is liquid refrigerant. Compared with the traditional indoor air temperature regulation system, this indoor air temperature regulation system greatly reduces the refrigerant density and refrigerant mass corresponding to the outlet of the outdoor unit 2. For the indoor air temperature regulation system, the refrigerant filling amount is mainly concentrated in the outdoor unit. Therefore, adopting the indoor air temperature regulation system of the present disclosure can greatly reduce the refrigerant filling amount. In addition, in this indoor air temperature regulation system, since part of the gaseous refrigerant at the outlet of the outdoor unit 2 is still high-pressure gas, this part of the gaseous refrigerant returns to the suction port 12 of the compressor 1 through the gas phase outlet 33 of the gas-liquid separator 3. The compressor 1 only needs to spend very little compression work to make this part of the gaseous refrigerant return to the outdoor unit 2 for heat exchange again. Therefore, it has the effect of energy saving and efficiency improvement.

[0157] The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An indoor air temperature regulation system, characterized in that, The indoor air temperature regulation system includes a compressor (1), an outdoor unit (2), a gas-liquid separator (3), and an indoor unit assembly (4); The compressor (1) has a first air inlet (11), a second air inlet (12), and an air outlet (13); The inlet of the outdoor unit (2) is connected to the air outlet (13) of the compressor (1); The gas-liquid separator (3) has a gas-liquid phase inlet (31), a liquid phase outlet (32), and a gas phase outlet (33). The gas-liquid phase inlet (31) is connected to the outlet of the outdoor unit (2), the liquid phase outlet (32) is connected to the inlet of the indoor unit assembly (4), and the gas phase outlet (33) is connected to the second air inlet (12); The outlet of the indoor unit assembly (4) is connected to the first air inlet (11).

2. The indoor air temperature regulation system according to claim 1, characterized in that, The compressor (1) includes a first cylinder block (110) and a second cylinder block (120); The first cylinder block (110) has the first air inlet (11) and a first air outlet (131); The second cylinder block (120) has the second air inlet (12) and a second air outlet (132); The inlet of the outdoor unit (2) is connected to the first air outlet (131) and the second air outlet (132).

3. The indoor air temperature regulation system according to claim 1, characterized in that, The indoor unit assembly (4) includes a throttle valve (41) and an indoor unit body (42); The inlet of the throttle valve (41) is connected to the liquid phase outlet (32), and the outlet of the throttle valve (41) is connected to the inlet of the indoor unit body (42); The outlet of the indoor unit body (42) is connected to the first air inlet (11).

4. The indoor air temperature regulation system according to claim 3, characterized in that, The indoor air temperature regulation system further includes a first four-way valve (5) and a second four-way valve (6); The first four-way valve (5) has a first interface (51), a second interface (52), a third interface (53), and a fourth interface (54). The first interface (51) is connected to the air outlet (13), the second interface (52) is connected to the inlet of the outdoor unit (2), the third interface (53) is connected to the first air inlet (11), and the fourth interface (54) is connected to the outlet of the indoor unit body (42); The second four-way valve (6) has a fifth interface (61), a sixth interface (62), a seventh interface (63), and an eighth interface (64). The fifth interface (61) is connected to the outlet of the outdoor unit (2), the sixth interface (62) is connected to the gas-liquid phase inlet (31), the seventh interface (63) is connected to the inlet of the indoor unit body (42), and the eighth interface (64) is connected to the outlet of the throttle valve (41).

5. The indoor air temperature regulation system according to claim 4, characterized in that, The indoor air temperature regulation system further includes a controller (001); The controller (001) is electrically connected to the first four-way valve (5) and the second four-way valve (6) for: Under the refrigeration condition, control the first interface (51) to communicate with the second interface (52), control the third interface (53) to communicate with the fourth interface (54), control the fifth interface (61) to communicate with the sixth interface (62), and control the seventh interface (63) to communicate with the eighth interface (64); Under the heating condition, control the first interface (51) to communicate with the fourth interface (54), control the second interface (52) to communicate with the third interface (53), control the fifth interface (61) to communicate with the eighth interface (64), and control the second interface (52) to communicate with the third interface (53).

6. The indoor air temperature regulation system according to claim 3, characterized in that, The throttle valve (41) is an electronically controlled valve.

7. The indoor air temperature regulation system according to claim 1, characterized in that, The indoor air temperature regulation system further includes a first connecting pipe (7), and the first connecting pipe (7) includes a first connecting pipe body (71) and an orifice plate (72); Both ends of the first connecting pipe body (71) are respectively communicated with the liquid phase outlet (32) and the inlet of the indoor unit assembly (4); The orifice plate (72) is located inside the first connecting pipe body (71) and is connected to the first connecting pipe body (71).

8. The indoor air temperature regulation system according to claim 1, characterized in that, The indoor air temperature regulation system further includes a second connecting pipe (8), and the second connecting pipe (8) includes a second connecting pipe body (81) and a plurality of baffles (82); Both ends of the second connecting pipe body (81) are respectively communicated with the gas phase outlet (33) and the second air inlet (12); The plurality of baffles (82) are all located inside the second connecting pipe body (81) and are connected to the second connecting pipe body (81).

9. The indoor air temperature regulation system according to claim 1, characterized in that, The gas-liquid separator (3) has a separation chamber (34); The side wall of the separation chamber (34) is communicated with the gas-liquid phase inlet (31), the bottom of the separation chamber (34) is communicated with the liquid phase outlet (32), and the top of the separation chamber (34) is communicated with the gas phase outlet (33).

10. The indoor air temperature regulation system according to claim 9, wherein, The separation chamber (34) has a cylindrical structure.

11. The indoor air temperature regulation system according to any one of claims 1 to 10, wherein, The refrigerant used in the indoor air temperature regulation system is propane, and the refrigerant charge of the indoor air temperature regulation system is less than 700 g.

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