Air conditioner and two-way temperature regulation and energy-saving system thereof

Abstract

The present invention discloses an air conditioner and a two-way temperature control and energy-saving system thereof. The two-way temperature control and energy-saving system includes a circulation loop and a first heat exchanger and a second heat exchanger connected to the circulation loop. The system also includes a first bypass branch having a first valve disposed thereon, and a second bypass branch having a second valve disposed thereon. The two-way temperature control and energy-saving system provided by the present invention utilizes two-way temperature compensation for temperature control. Specifically, high-temperature compensation utilizes wasted high-temperature heat within the system, while low-temperature compensation utilizes low-temperature cooling within the system. This ensures temperature accuracy and stability, while also enabling rapid temperature adjustment and achieving greater energy savings.

Description

Technical Field

[0001] The present invention relates to the field of air-conditioning equipment, and in particular to a two-way temperature adjustment and energy-saving system. In addition, the present invention also relates to an air-conditioning comprising the two-way temperature adjustment and energy-saving system. Background Art

[0002] In the field of high-precision temperature-controlled air conditioning and cooling, in order to achieve precise temperature control, the medium temperature is generally lowered to a temperature slightly lower than the target temperature value through a heat exchanger, and then slowly heated by electric heating to achieve high-precision temperature control. That is, when the temperature drops to a temperature close to the critical required temperature, the electric heater is powered on to generate heat and perform micro-heat conduction, so as to quickly achieve the temperature standard and smaller fluctuations.

[0003] However, the method of using electric heating for precise temperature control in the existing technology has the following disadvantages: First, the use of electric heaters as power-consuming devices increases the loss of the entire system. In the future, as the requirements for energy efficiency become increasingly higher, simple electric heating methods are not conducive to energy saving, and therefore are not conducive to reducing energy consumption; Second, when the electric heating method makes the system temperature higher than the target temperature value, it is impossible to achieve a callback at this time, and this part of the heat can only be bypassed or transferred to the load end, causing the load temperature to fluctuate; Third, if the load of the system increases rapidly, the one-way compensation method is not easy to achieve quickly at this time, and requires subsequent system circulation to enter the evaporation end of the heat exchanger to obtain low temperature before it can be achieved, and the response speed is slow.

[0004] Therefore, how to quickly achieve temperature compensation is a technical problem that those skilled in the art currently need to solve. Summary of the Invention

[0005] The object of the present invention is to provide a two-way temperature adjustment and energy-saving system that can quickly achieve temperature compensation. Another object of the present invention is to provide an air conditioner including the above-mentioned two-way temperature adjustment and energy-saving system.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A two-way temperature control and energy-saving system includes a circulation loop and a first heat exchanger and a second heat exchanger connected to the circulation loop, and further includes:

[0008] a first bypass branch, wherein an inlet of the first bypass branch is connected to a first inlet of the second heat exchanger, and an outlet of the first bypass branch is connected to a first outlet of the second heat exchanger;

[0009] a second bypass branch, wherein an inlet of the second bypass branch is connected to the first outlet of the second heat exchanger, and an outlet of the second bypass branch is connected to the first inlet of the first heat exchanger;

[0010] The second heat exchanger, the inlet of the second bypass branch, and the outlet of the first bypass branch are arranged in sequence; the first valve is arranged on the first bypass branch, and the second valve is arranged on the second bypass branch.

[0011] Optionally, the above-mentioned bidirectional temperature control and energy-saving system includes a first temperature sensor, which is arranged between the first outlet of the second heat exchanger and the inlet of the second bypass branch; a second temperature sensor, which is arranged between the outlet of the first bypass branch and the outlet of the second bypass branch, and the first valve is a flow regulating valve.

[0012] Optionally, in the above-mentioned two-way temperature regulation and energy-saving system, the accuracy of the first temperature sensor and the second temperature sensor are both within ±0.3 degrees, and the accuracy of the first valve is within 1%.

[0013] Optionally, the above-mentioned bidirectional temperature regulation and energy-saving system further includes a third temperature sensor or a first pressure sensor, and / or a fourth temperature sensor or a second pressure sensor for monitoring changes in the load of the first heat exchanger;

[0014] The third temperature sensor or the first pressure sensor is disposed at the first inlet of the first heat exchanger, and the fourth temperature sensor or the second pressure sensor is disposed at the first outlet of the first heat exchanger.

[0015] Optionally, the above-mentioned two-way temperature control and energy-saving system also includes a mixer, the outlet of the first bypass branch and the first outlet of the second heat exchanger are both connected to the inlet of the mixer, and the outlet of the mixer is connected to the outlet of the second bypass branch.

[0016] Optionally, the above-mentioned bidirectional temperature regulation and energy-saving system further includes a thermal buffer connected between the first inlet of the first heat exchanger and the outlet of the second bypass branch.

[0017] Optionally, the above-mentioned two-way temperature control and energy-saving system further includes a third heat exchanger, wherein the first inlet of the third heat exchanger is connected to the outlet of the first bypass branch, and the first outlet of the third heat exchanger is connected to the outlet of the second bypass branch.

[0018] Optionally, the above-mentioned bidirectional temperature control and energy-saving system also includes a first cooling pipeline for exchanging heat with the second heat exchanger and a second cooling pipeline for exchanging heat with the third heat exchanger, the inlet of the second cooling pipeline is connected to the inlet of the first cooling pipeline, and the outlet of the second cooling pipeline is connected to the outlet of the first cooling pipeline.

[0019] Optionally, in the above-mentioned two-way temperature regulation and energy-saving system, a third valve is provided on the second cooling pipeline.

[0020] The present invention also provides an air conditioner comprising any one of the above energy-saving refrigeration systems.

[0021] The energy-saving refrigeration system provided by the present invention introduces the first bypass branch and the second bypass branch. When the temperature of the medium at the first outlet of the second heat exchanger is lower than the target temperature value, the high-temperature medium from the first outlet of the first heat exchanger is introduced through the first bypass branch to form a first mixed medium. Since the temperature of the medium at the first outlet of the first heat exchanger is higher, the medium at the first outlet of the second heat exchanger can be heated. When the temperature of the first mixed medium is higher than the target temperature value, the low-temperature medium from the first outlet of the second heat exchanger is introduced through the second bypass branch. The temperature of the medium at the first outlet of the second heat exchanger is relatively low, so the first mixed medium can be cooled to form a second mixed medium; the energy-saving refrigeration system adopts a two-way energy-saving temperature compensation method, that is, high-temperature compensation utilizes the wasted high-temperature heat source in the system, and low-temperature compensation utilizes the low-temperature cold source in the system to ensure the requirements for temperature accuracy and stability. At the same time, it can also achieve rapid temperature adjustment and save more energy. Among them, through the adjustment of the first bypass branch and the second bypass branch, the temperature accuracy of the medium can be adjusted to within ±0.3 degrees and optimally, the temperature accuracy of the medium can be adjusted to within ±0.1 degrees and less.

[0022] In a preferred embodiment, a third heat exchanger is further included; the outlet medium of the first bypass branch can be mixed with the first outlet medium of the second heat exchanger to form a first mixed medium, the first inlet of the third heat exchanger can be used for the inflow of the first mixed medium, and the first outlet of the third heat exchanger is connected to the outlet of the second bypass branch. . In the above arrangement, by introducing the third heat exchanger, when the temperature of the first mixed medium formed by the mixture of the outlet medium of the first bypass branch and the first outlet medium of the second heat exchanger is higher than the target temperature value, the temperature can be lowered by introducing the medium of the first outlet of the second heat exchanger through the second bypass branch, or by introducing an external medium for heat exchange through the third heat exchanger, or both cooling methods can be used simultaneously; this method can further improve the accuracy, efficiency and stability of medium temperature regulation.

[0023] The air conditioner provided by the present invention is provided with the above-mentioned energy-saving refrigeration system. Since the energy-saving refrigeration system has the above-mentioned technical effects, the air conditioner provided with the energy-saving refrigeration system should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of a first embodiment of the energy-saving refrigeration system provided by the present invention;

[0026] Figure 2 This is a structural diagram of a second embodiment of the energy-saving refrigeration system provided by the present invention;

[0027] Among them: a first heat exchanger 1; a second heat exchanger 2; a first temperature sensor 21; a second temperature sensor 22; a first bypass branch 3; a first valve 31; a flow sensor 32; a second bypass branch 4; a second valve 41; a mixer 5; a third heat exchanger 6; a third valve 61; and a thermal buffer 7. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide an energy-saving refrigeration system with low energy consumption, fast response, high temperature regulation accuracy and good stability. Another core of the present invention is to provide an air conditioner including the above energy-saving refrigeration system.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The energy-saving refrigeration system provided by the present invention introduces a first bypass branch 3 and a second bypass branch 4 to introduce the high-temperature medium of the first outlet of the first heat exchanger 1 into the first outlet of the second heat exchanger 2, and introduces the low-temperature medium of the first outlet of the second heat exchanger 2 into the mixed medium, thereby realizing two-way temperature compensation within the system, and can adjust the temperature accuracy of the medium to within ±0.3 degrees. Optimally, the temperature accuracy of the medium can be adjusted to within ±0.1 degrees, and finally the medium with the target temperature value is transported to the first inlet of the first heat exchanger 1. The setting of the circulation loop can refer to the conventional cooling system structure.

[0031] Please refer to Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a first embodiment of the energy-saving refrigeration system provided by the present invention; Figure 2This is a structural diagram of the second embodiment of the energy-saving refrigeration system provided by the present invention.

[0032] In this embodiment, the energy-saving refrigeration system includes a circulation loop and a first heat exchanger 1 and a second heat exchanger 2 connected to the circulation loop. Figure 1 As shown, it also includes:

[0033] a first bypass branch 3, the inlet of the first bypass branch 3 being connected to the first inlet of the second heat exchanger 2, and the outlet of the first bypass branch 3 being connected to the first outlet of the second heat exchanger 2, so that the medium in the first bypass branch 3 and the medium at the second outlet of the second heat exchanger 2 are mixed to form a first mixed medium, which then flows into the first inlet of the first heat exchanger 1. A first valve 31 is provided on the first bypass branch 3;

[0034] The second bypass branch 4, the inlet of the second bypass branch 4 is connected to the first outlet of the second heat exchanger 2, the outlet of the second bypass branch 4 is connected to the first inlet of the first heat exchanger 1, the medium in the second bypass branch 4 is mixed with the first mixed medium to form a second mixed medium, and the second mixed medium flows into the first heat exchanger 1, and a second valve 41 is provided on the second bypass branch 4.

[0035] Among them, the second heat exchanger 2, the inlet of the second bypass branch 4, and the outlet of the first bypass branch 3 are arranged in sequence; further, a controller can be included, which can be used to control the opening and closing of the first valve 31 and the second valve 41 respectively. The first valve 31 and the second valve 41 are electronic valves. Of course, the first valve 31 and the second valve 41 can also be opened and closed manually. At this time, the first valve 31 and the second valve 41 can be mechanical valves. Preferably, the opening and closing of the first valve 31 and the second valve 41 can be controlled by the controller.

[0036] It can also include a first temperature sensor 21, which is arranged between the first outlet of the second heat exchanger 2 and the inlet of the second bypass branch 4; and a second temperature sensor 22, which is arranged between the outlet of the first bypass branch 3 and the outlet of the second bypass branch 4. It should be noted that the second temperature sensor 22 should be arranged on the pipeline after the outlet medium of the first bypass branch 3 and the first outlet medium of the second heat exchanger 2 are mixed. The second temperature sensor 22 is used to detect the temperature of the first mixed medium. Among them, the first valve 31 is a flow regulating valve. Since the medium temperature of the first inlet of the second heat exchanger 2 is different from that of its first The medium temperature at the outlet is quite different, that is, the medium temperature at the first inlet of the second heat exchanger 2 is relatively high. Therefore, by changing the first valve 31 to a flow regulating valve with adjustable opening, the flow of the first bypass branch 3 can be made smaller. For example, the medium flow of the first bypass branch 3 can be (0.1-10)% of the medium flow at the first outlet of the first heat exchanger 1. In this way, the medium can be slowly mixed with the medium at the first outlet of the second heat exchanger 2 through a smaller medium flow, thereby achieving the purpose of precise temperature control, wherein the temperature accuracy of the medium can be adjusted to within ±0.3 degrees or less, and optimally, the temperature accuracy of the medium can be adjusted to within ±0.1 degrees or less.

[0037] Since the temperature of the medium at the first outlet of the second heat exchanger 2 is not much different from the temperature of the medium after mixing in the first bypass branch 3, the second valve 41 can be set as an ordinary valve. Of course, in order to accurately adjust the temperature, the second valve 41 can also be set as a flow control valve with adjustable opening, which can further achieve the purpose of accurate temperature control.

[0038] Optionally, in order to achieve high-precision temperature control, the accuracy of the first temperature sensor 21 and the second temperature sensor 22 is within ±0.3 degrees, and the accuracy of the first valve 31 is within 1%. Preferably, the accuracy of the first temperature sensor 21 and the second temperature sensor 22 can be within ±0.1 degrees, so that the accuracy of each temperature sensor and valve matches the temperature control accuracy of the system.

[0039] When the first temperature sensor 21 detects that the temperature of the medium at the first outlet of the second heat exchanger 2 is lower than the target temperature value, the opening of the first valve 31 is controlled so that the high-temperature medium at the first inlet of the second heat exchanger 2 is bypassed to the outlet of the first bypass branch 3 and mixed with the low-temperature medium at the first outlet of the second heat exchanger 2, thereby heating the medium at the first outlet of the second heat exchanger 2 so that the temperature of the medium reaches the target temperature value.

[0040] When the second temperature sensor 22 detects that the temperature of the first mixed medium is higher than the target temperature value, the second valve 41 is controlled to open or the opening degree of the second valve 41 is controlled so that the low-temperature medium at the first outlet of the second heat exchanger 2 is bypassed to the outlet of the second bypass branch 4 to mix with the first mixed medium, thereby cooling the first mixed medium to form a second mixed medium, so that the temperature of the second mixed medium reaches the target temperature value.

[0041] In addition, since the load of the first heat exchanger 1 changes according to the actual application scenario, for example, the temperature demand becomes larger or smaller, a third temperature sensor or a first pressure sensor, and / or a fourth temperature sensor or a second pressure sensor are also provided for monitoring the change in the load of the first heat exchanger 1; the third temperature sensor or the first pressure sensor is arranged at the first inlet of the first heat exchanger 1, and the fourth temperature sensor or the second pressure sensor is arranged at the first outlet of the first heat exchanger 1; in this way, when the load changes, the temperature or pressure of the first inlet and the first outlet of the first heat exchanger 1 will change, and therefore, by monitoring the pressure or temperature change of its first inlet, or / and monitoring the pressure or temperature change of its first outlet, the target temperature value of the system and the accuracy of the target temperature value can be updated in real time, thereby simultaneously updating the heat exchange capacity of each heat exchanger, so that the medium temperature of the entire temperature control system matches the actual use.

[0042] Specifically, the first heat exchanger 1 serves as the terminal heat exchanger, exchanging heat with components or environments requiring cooling. The second heat exchanger 2 is used to cool the high-temperature medium flowing out of the first heat exchanger 1. The medium includes, but is not limited to, cooling liquids such as cooling water, and fluids such as gas may also be used as needed. The first outlet of the first heat exchanger 1 is connected to the first inlet of the second heat exchanger 2, and the first outlet of the second heat exchanger 2 is connected to the first inlet of the first heat exchanger 1. The first outlet of the first heat exchanger 1 is the return port of the circulation loop, and the first inlet of the first heat exchanger 1 is the outlet of the circulation loop. The medium flowing out of the outlet is provided to devices requiring cooling. When the first heat exchanger 1 dissipates heat for equipment with high-precision heat dissipation requirements, the medium temperature accuracy requirements are relatively high. The medium cools the equipment through the first heat exchanger 1. After passing through the first heat exchanger 1, the medium temperature at its first outlet is relatively high, and it needs to flow through the second heat exchanger 2 for cooling. At the same time, a circulation pump should be provided in the circulation loop to provide power for the flow of the medium in the circulation loop; components such as pressure sensors, flow sensors 32 and temperature sensors can also be provided in the circulation loop to monitor information such as pressure, flow and temperature in the circulation loop.

[0043] The energy-saving refrigeration system provided by the present invention introduces a first bypass branch 3 and a second bypass branch 4. When the temperature of the medium at the first outlet of the second heat exchanger 2 is lower than the target temperature value, the medium from the first outlet of the first heat exchanger 1 is introduced through the first bypass branch 3. Since the temperature of the medium at the first outlet of the first heat exchanger 1 is higher, the medium at the first outlet of the second heat exchanger 2 can be heated; after the medium at the first outlet of the second heat exchanger 2 is mixed with the medium in the first bypass branch 3 to form a first mixed medium, when the temperature of the first mixed medium is higher than the target temperature value, the medium from the first outlet of the second heat exchanger 2 is introduced through the second bypass branch 4. Since the temperature of the medium at the first outlet of the second heat exchanger 2 is lower, the first mixed medium can be cooled; the energy-saving refrigeration system adopts a two-way energy-saving temperature compensation method, that is, high-temperature compensation utilizes the wasted high-temperature heat source in the system, and low-temperature compensation utilizes the low-temperature heat source in the system, ensuring the requirements for temperature accuracy and stability, and at the same time can also achieve rapid temperature adjustment.

[0044] In some embodiments, the first bypass branch 3 is provided with a first flow sensor 32, and the controller is connected to the first flow sensor 32. Specifically, the first flow sensor 32 is used to detect the flow in the first bypass branch 3. The controller controls the opening of the first valve 31 according to the temperature of the first outlet of the second heat exchanger 2, thereby changing the flow in the first bypass branch 3. The first flow sensor 32 can feed back the flow data in the first bypass branch 3 to the controller.

[0045] In some embodiments, the flow rates in both the first bypass branch 3 and the second bypass branch 4 are smaller than the flow rate in the circulation loop. Specifically, the medium flowing out of the first outlet of the first heat exchanger 1 partially enters the first bypass branch 3, and partially enters the first inlet of the second heat exchanger 2. Specifically, the flow rate entering the first bypass branch 3 can be regulated by the first valve 31. By controlling the outlet flow rate of the first bypass branch 3 to be no higher than the flow rate of the first inlet of the second heat exchanger 2, control accuracy can be improved. Since the first bypass branch 3 serves as a temperature compensation adjustment to replace the conventional heater, its flow rate is generally smaller, and the smaller the flow rate, the higher its relative accuracy. Through high-precision adjustment, the energy-saving cooling system can meet the requirements of high-precision temperature control cooling. Furthermore, part of the medium flowing out of the first outlet of the second heat exchanger 2 enters the second bypass branch 4, and part of it is mixed with the medium in the first bypass branch 3. Specifically, the flow entering the second bypass branch 4 can be regulated by the second valve 41; the outlet flow of the second bypass branch 4 is controlled not to be higher than the flow of the first outlet of the second heat exchanger 2 to improve the control accuracy; the flow of the second bypass branch 4 is usually small, and the smaller the flow, the higher its relative accuracy; through high-precision adjustment, the energy-saving cooling system can meet the high-precision temperature control cooling requirements.

[0046] In some embodiments, a mixer 5 is further included. The outlet of the first bypass branch 3 and the first outlet of the second heat exchanger 2 are both connected to the inlet of the mixer 5, which is also connected to the first inlet of the first heat exchanger 1. Specifically, the medium in the first bypass branch 3 and the medium in the first outlet of the second heat exchanger 2 are mixed in the mixer 5 before flowing into the first inlet of the first heat exchanger 1. The provision of the mixer 5 accelerates temperature uniformity and improves the efficiency and accuracy of the overall energy-saving cooling system. Of course, the outlet of the first bypass branch 3 and the first outlet of the second heat exchanger 2 can also be connected to a main pipe, which is then connected to the first inlet of the first heat exchanger 1, and mixing can be achieved within the main pipe; alternatively, the outlet of the first bypass branch 3 can be connected to the pipeline between the first outlet of the second heat exchanger 2 and the first inlet of the first heat exchanger 1, which can also achieve mixing. The mixer can be provided with a baffle with a gap between the baffle and the inner wall of the mixer. The baffle slows the flow rate of the fluid, which can improve the uniformity of the medium mixing within the mixer. The baffle can be provided in one or more pieces.

[0047] In some embodiments, a thermal buffer 7 is further included, connected between the first inlet of the first heat exchanger 1 and the outlet of the mixer 5. A controller is configured to control the second valve 41 based on the temperature at the outlet of the mixer 5. Specifically, when the mixer 5 is provided, the thermal buffer 7 is connected between the first inlet of the first heat exchanger 1 and the outlet of the mixer 5. When the mixer 5 is not provided, the thermal buffer 7 is connected between the outlet of the second bypass branch 4 and the first outlet of the second heat exchanger 2, and the first inlet of the first heat exchanger 1. The provision of the thermal buffer 7 regulates temperature stability, ensuring that after high-precision temperature fine-tuning is achieved through the first bypass branch 3 and the second bypass branch 4, the temperature is further stabilized, and a temperature-stable medium is provided to the first inlet of the first heat exchanger 1, achieving precise control.

[0048] In some embodiments, a first temperature sensor 21 is provided at the first outlet of the second heat exchanger 2, and a second temperature sensor 22 is provided at the outlet of the mixer 5. Both the first temperature sensor 21 and the second temperature sensor 22 are connected to a controller. Specifically, the controller is configured to control the first valve 31 based on the temperature of the first temperature sensor 21 and to control the second valve 41 based on the temperature of the second temperature sensor 22.

[0049] In some embodiments, at least one barrier member is provided within the mixer 5, with a gap between the barrier member and the inner wall of the mixer 5. In other words, the barrier member is in a semi-enclosed state. The barrier member serves to guide the fluid within the mixer 5 and extend the flow path within the mixer 5, resulting in more uniform mixing. Specifically, the barrier member can be a baffle, which is low-cost and easy to manufacture.

[0050] In some embodiments, as Figure 2 As shown, a third heat exchanger 6 is also included; the outlet medium of the first bypass branch 3 is mixed with the first outlet medium of the second heat exchanger 2 to form a first mixed medium, the first inlet of the third heat exchanger 6 is for the first mixed medium to flow in, and the first outlet of the third heat exchanger 6 is connected to the outlet of the second bypass branch 4. Specifically, the first inlet of the third heat exchanger 6 is for the first mixed medium to flow in, the first inlet of the third heat exchanger 6 can be connected to the outlet of the mixer 5, and the first outlet of the third heat exchanger 6 is connected to the first inlet of the first heat exchanger 1. With the above arrangement, by introducing the third heat exchanger 6, when the temperature of the first mixed medium is higher than the target temperature value, it is possible to choose to introduce the medium of the first outlet of the second heat exchanger 2 through the second bypass branch 4 to achieve cooling, or to introduce an external medium through the third heat exchanger 6 to achieve cooling, or to use both cooling methods at the same time; this method can further improve the accuracy, efficiency and stability of medium temperature regulation.

[0051] In some embodiments, the second heat exchanger 2 includes a first cooling pipeline, the third heat exchanger 6 includes a second cooling pipeline, the inlet of the second cooling pipeline is connected to the inlet of the first cooling pipeline, and the outlet of the second cooling pipeline is connected to the outlet of the first cooling pipeline. That is to say, the third heat exchanger 6 and the second heat exchanger 2 select the same cooling pipeline to reduce the layout cost of the equipment. Of course, the third heat exchanger 6 can also use a separate cooling pipeline.

[0052] In some embodiments, a third valve 61 is provided on the second cooling pipeline, and the controller is also used to control the third valve 61 according to the temperature of the first mixed medium, that is, the controller is also used to control the third valve 61 according to the temperature of the second temperature sensor 22. That is to say, when the second temperature sensor 22 detects that the temperature of the first mixed medium is lower than the target temperature value, the temperature can be lowered by opening the second valve 41, or the temperature can be lowered by opening the third valve 61. The second valve 41 and the third valve 61 can also be opened at the same time, and the flow rate of the second valve 41 and the third valve 61 can be adjusted to adjust the temperature of the medium entering the first heat exchanger 1.

[0053] Of course, to save on the installation cost of the third heat exchanger 6, a heat exchange branch can also be arranged directly on the outlet pipeline of the mixer 5. The heat exchange branch is provided with a heat exchange portion, which is close to the outlet pipeline of the mixer 5 to perform heat exchange on the outlet pipeline of the mixer 5. The inlet of the heat exchange branch is connected to the inlet of the first cooling circuit, and the outlet of the heat exchange branch is connected to the outlet of the first cooling circuit. A third valve 61 is provided on the heat exchange branch. The controller is also used to control the third valve 61 according to the outlet temperature of the mixer 5. The above solution can replace the installation of the third heat exchanger 6 without changing the structure and position of the outlet pipeline of the mixer 5. Furthermore, the heat exchange portion is a spiral tubular heat exchange portion to improve heat exchange efficiency.

[0054] In some embodiments, in order to facilitate the controller to control the first valve 31, the second valve 41 and / or the third valve 61, the first valve 31, the second valve 41 and / or the third valve 61 are regulating valves. Of course, without considering the control accuracy, the first valve 31, the second valve 41 and / or the third valve 61 can also be a stop valve, which is lower in cost.

[0055] In addition to the above energy-saving refrigeration system, the present invention also provides an air conditioner including the above energy-saving refrigeration system. For the structures of other parts of the air conditioner, please refer to the prior art and will not be described in detail herein.

[0056] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above is a detailed introduction to the energy-saving refrigeration system provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications may be made to the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A two-way temperature control and energy-saving system, comprising a circulation loop and a first heat exchanger (1) and a second heat exchanger (2) connected to the circulation loop, characterized in that: Also includes: a first bypass branch (3), wherein the inlet of the first bypass branch (3) is connected to the first inlet of the second heat exchanger (2), and the outlet of the first bypass branch (3) is connected to the first outlet of the second heat exchanger (2); a second bypass branch (4), wherein the inlet of the second bypass branch (4) is connected to the first outlet of the second heat exchanger (2), and the outlet of the second bypass branch (4) is connected to the first inlet of the first heat exchanger (1); The second heat exchanger (2), the inlet of the second bypass branch (4), and the outlet of the first bypass branch (3) are arranged in sequence so that part of the medium flowing out of the first outlet of the second heat exchanger (2) enters the second bypass branch (4), part of it is mixed with the medium in the first bypass branch (3), and then flows into the first inlet of the first heat exchanger (1); A first valve (31) is provided in the first bypass branch (3), wherein the first valve (31) is a flow regulating valve; a second valve (41) is provided in the second bypass branch (4); The invention also includes a third heat exchanger (6); the outlet medium of the first bypass branch (3) can be mixed with the first outlet medium of the second heat exchanger (2) to form a first mixed medium; the first inlet of the third heat exchanger (6) can be used for the first mixed medium to flow into; the first outlet of the third heat exchanger (6) is connected to the outlet of the second bypass branch (4).

2. The two-way temperature control and energy saving system according to claim 1, characterized in that: Also includes: A first temperature sensor (21) is provided between the first outlet of the second heat exchanger (2) and the inlet of the second bypass branch (4); and a second temperature sensor (31) is provided between the outlet of the first bypass branch (3) and the outlet of the second bypass branch (4).

3. The two-way temperature control and energy saving system according to claim 2, characterized in that: The accuracy of the first temperature sensor (21) and the second temperature sensor (31) are both within ±0.3 degrees, and the accuracy of the first valve (31) is within 1%.

4. The two-way temperature regulation and energy saving system according to claim 1, characterized in that: Also includes a third temperature sensor or a first pressure sensor, and / or a fourth temperature sensor or a second pressure sensor for monitoring changes in the load of the first heat exchanger (1); The third temperature sensor or the first pressure sensor is arranged at the first inlet of the first heat exchanger (1), and the fourth temperature sensor or the second pressure sensor is arranged at the first outlet of the first heat exchanger (1).

5. The two-way temperature regulation and energy saving system according to claim 1, characterized in that: It also includes a mixer (5), the outlet of the first bypass branch (3) and the first outlet of the second heat exchanger (2) are both connected to the inlet of the mixer (5), and the outlet of the mixer (5) is connected to the outlet of the second bypass branch (4).

6. The two-way temperature regulation and energy saving system according to claim 5, characterized in that: It also includes a thermal buffer (7), which is connected between the first inlet of the first heat exchanger (1) and the outlet of the second bypass branch (4).

7. The two-way temperature regulation and energy saving system according to claim 1, characterized in that: It also includes a first cooling pipeline for exchanging heat with the second heat exchanger (2) and a second cooling pipeline for exchanging heat with the third heat exchanger (6), wherein the inlet of the second cooling pipeline is connected to the inlet of the first cooling pipeline, and the outlet of the second cooling pipeline is connected to the outlet of the first cooling pipeline.

8. The two-way temperature regulating and energy-saving system according to claim 7, characterized in that: A third valve (61) is provided on the second cooling pipeline.

9. An air conditioner comprising an energy-saving refrigeration system, characterized in that: The two-way temperature control and energy-saving system is the two-way temperature control and energy-saving system according to any one of claims 1 to 8.

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