Temperature control system and air conditioner

Abstract

The application provides a temperature control system and an air conditioner; the temperature control system comprises a control unit, a power supply unit, an ambient temperature detection unit and an evaporator coil temperature detection unit; the ambient temperature detection unit comprises a ring temperature sensor assembly and a first inductor, the evaporator coil temperature detection unit comprises an inner coil sensor assembly and a second inductor, the control unit is used for acquiring the ambient temperature collected by the ring temperature sensor assembly and the evaporator coil temperature collected by the inner coil sensor assembly, and controlling the temperature of the air conditioner according to the ambient temperature and the evaporator coil temperature; the system structure not only realizes the temperature control of the air conditioner, but also plays a role in inhibiting common mode and differential mode noise interference by arranging the inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit respectively, improves the EMC test qualified rate of the air conditioner, and has a simple structure and good practical value.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to temperature control systems and air conditioners. Background Technology

[0002] Currently, air conditioners must meet national EMC (Electromagnetic Compatibility) testing standards and requirements to be allowed to be sold. This means that the electromagnetic energy generated by the air conditioning equipment must neither interfere with other equipment nor be interfered with by the electromagnetic energy of other equipment. However, the problems of air conditioners failing to meet EMC standards and being difficult to rectify are unavoidable challenges for the air conditioning industry.

[0003] In existing air conditioners, to better control temperature, the indoor unit's main control board uses a temperature sensor circuit consisting of two parts: an ambient temperature sensor circuit and an evaporator coil temperature sensor circuit. The ambient temperature sensor circuit typically includes an ambient temperature sensor assembly to detect the ambient temperature; the evaporator coil temperature sensor circuit typically includes an inner coil sensor assembly to detect the evaporator coil temperature. In practical applications, while these ambient temperature sensor assemblies and inner coil sensor assemblies can detect temperature, they are generally connected to the indoor unit via wires. This makes them prone to becoming sources of radiation interference with antenna characteristics and susceptible to inductive coupling from other antennas, thus affecting the air conditioner's EMC performance, reducing the EMC test pass rate, and failing to meet practical application requirements. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a temperature control system and an air conditioner to alleviate the above problems and improve the EMC test pass rate of the air conditioner.

[0005] In a first aspect, embodiments of the present invention provide a temperature control system, comprising: a control unit, a power supply unit, and an ambient temperature detection unit and an evaporator coil temperature detection unit respectively connected to the control unit; the ambient temperature detection unit and the evaporator coil temperature detection unit are also respectively connected to the power supply unit; wherein, the ambient temperature detection unit includes an ambient temperature sensor assembly and a first inductor, the evaporator coil temperature detection unit includes an inner coil sensor assembly and a second inductor, both the first inductor and the second inductor are connected to the power supply unit, and both the ambient temperature sensor assembly and the inner coil sensor assembly are also communicatively connected to the control unit; the control unit is used to acquire the ambient temperature collected by the ambient temperature sensor assembly and the evaporator coil temperature collected by the inner coil sensor assembly, and to control the temperature of the air conditioner according to the ambient temperature and the evaporator coil temperature.

[0006] Furthermore, the present invention provides a first possible implementation of the first aspect, wherein the first inductor and the second inductor are both differential and common-mode integrated surface mount inductors.

[0007] Furthermore, the present invention provides a second possible implementation of the first aspect, wherein the inductance value of the first inductor satisfies: 8uH~12uH, and the inductance value of the second inductor satisfies: 8uH~12uH.

[0008] Furthermore, the present invention provides a third possible implementation of the first aspect, wherein the above-mentioned ambient temperature detection unit further includes a first interface; wherein the first interface includes a first port, a second port and a third port, the first port is connected to a first inductor, the second port is connected to a control unit, and the third port is connected to an ambient temperature sensor assembly.

[0009] Furthermore, the present invention provides a fourth possible implementation of the first aspect, wherein the above-mentioned ambient temperature sensor assembly includes a first thermistor, and the first thermistor is connected to a third port through a first connecting line.

[0010] Furthermore, the present invention provides a fifth possible implementation of the first aspect, wherein the above-mentioned ambient temperature detection unit further includes a first filtering unit, wherein the first filtering unit includes a first resistor, a second resistor and a first capacitor; the second port is connected to one end of the first resistor and one end of the second resistor respectively, the other end of the first resistor is connected to one end of the first capacitor and the control unit respectively, and the other end of the first capacitor and the other end of the second resistor are both grounded.

[0011] Furthermore, the present invention provides a sixth possible implementation of the first aspect, wherein the evaporator coil temperature detection unit further includes a second interface; wherein the second interface includes a fourth port, a fifth port and a sixth port, the fourth port is connected to a second inductor, the fifth port is connected to a control unit, and the sixth port is connected to an inner plate sensor assembly.

[0012] Furthermore, the present invention provides a seventh possible implementation of the first aspect, wherein the inner disk sensor assembly includes a second thermistor, the second thermistor being connected to the sixth port via a second connecting line.

[0013] Furthermore, the present invention provides an eighth possible implementation of the first aspect, wherein the evaporator coil temperature detection unit further includes a second filtering unit, wherein the second filtering unit includes a third resistor, a fourth resistor, and a second capacitor; the fifth port is connected to one end of the third resistor and one end of the fourth resistor respectively, the other end of the third resistor is connected to one end of the second capacitor and the control unit respectively, and the other end of the second capacitor and the other end of the fourth resistor are both grounded.

[0014] Secondly, embodiments of the present invention also provide an air conditioner, including an indoor unit and an outdoor unit; wherein the indoor unit is equipped with the temperature control system described in the first aspect.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] This invention provides a temperature control system and an air conditioner. The ambient temperature detection unit includes an ambient temperature sensor assembly and a first inductor. The evaporator coil temperature detection unit includes an inner coil sensor assembly and a second inductor. The control unit is used to acquire the ambient temperature collected by the ambient temperature sensor assembly and the evaporator coil temperature collected by the inner coil sensor assembly, and to control the temperature of the air conditioner based on the ambient temperature and the evaporator coil temperature. This system structure not only realizes the temperature control of the air conditioner, but also, by setting inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit respectively, plays a role in suppressing common-mode and differential-mode noise interference, improving the EMC test pass rate of the air conditioner. Moreover, the structure is simple and has good practical value.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of an ambient temperature sensor circuit provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of an evaporator coil temperature sensor circuit provided for an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a temperature control system provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of another temperature control system provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The temperature sensor circuit used in the main control board of the existing air conditioner indoor unit consists of two parts: an ambient temperature sensor circuit and an evaporator coil temperature sensor circuit; among them, such as Figure 1 As shown, the ambient temperature sensor circuit 1 includes a CN1 terminal, which has three ports: the first port is connected to a 5V power supply, the second port is connected to the ambient temperature sensor assembly (not shown), and the third port is connected to the controller 3 in the indoor unit via resistors R1 and R2 and capacitor C1; and, as shown... Figure 2 As shown, the evaporator coil temperature sensor circuit 2 includes a CN2 terminal, which also includes three ports. The first port is connected to a 5V power supply, the third port (not shown) is connected to the inner coil sensor assembly (not shown), and the second port is connected to the evaporator in the indoor unit through resistors R3 and R4 and capacitor C2. In practical applications, the ambient temperature sensor assembly and the inner coil sensor assembly are generally installed on the indoor unit via connecting wires. These components are prone to becoming sources of radiation interference with antenna characteristics and are easily coupled by other antennas, thus affecting the EMC performance of the air conditioner and reducing the EMC test pass rate.

[0026] To address the aforementioned issues, embodiments of the present invention provide a temperature control system and an air conditioner. By incorporating inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit, common-mode and differential-mode noise interference are suppressed, thereby improving the EMC test pass rate of the air conditioner. Furthermore, the system has a simple structure and good practical value.

[0027] To facilitate understanding of this embodiment, a temperature control system provided by this invention will be described in detail below.

[0028] This invention provides a temperature control system, such as... Figure 3As shown, the system includes: a control unit 31, a power supply unit 32, and an ambient temperature detection unit 33 and an evaporator coil temperature detection unit 34, both connected to the control unit 31. The ambient temperature detection unit 33 and the evaporator coil temperature detection unit 34 are also connected to the power supply unit 32. The ambient temperature detection unit 33 includes an ambient temperature sensor assembly 331 and a first inductor 332. The evaporator coil temperature detection unit 34 includes an inner coil sensor assembly 341 and a second inductor 342. Both the first inductor 332 and the second inductor 342 are connected to the power supply unit 32. The ambient temperature sensor assembly 331 and the inner coil sensor assembly 341 are also communicatively connected to the control unit 31 to send the collected temperature information to the control unit 31. It should be noted that the control unit 31, the power supply unit 32, and the ambient temperature detection unit 33 and the evaporator coil temperature detection unit 34, both connected to the control unit 31, are mounted on the indoor unit's substrate, which is also referred to as a circuit board or PCB (Printed Circuit Board).

[0029] The first inductor 332 and the second inductor 342 are both surface-mount inductors integrating differential and common-mode circuitry, thus suppressing common-mode and differential-mode noise interference. In practical applications, the inductance value of the first inductor 332 is 8uH~12uH, and the inductance value of the second inductor 342 is 8uH~12uH. The inductance values ​​of the first inductor 332 and the second inductor 343 can be equal or unequal, depending on the specific requirements.

[0030] The aforementioned ambient temperature sensor assembly 331 and inner coil sensor assembly 341 each include temperature acquisition elements, which include, but are not limited to, temperature sensors, NTC (Negative Temperature Coefficient) thermistors, etc., and are fixed to the indoor unit (or inner unit) of the air conditioner via connecting wires. Specific configurations can be made according to actual conditions. In practical applications, the control unit 31 is used to acquire the ambient temperature collected by the ambient temperature sensor assembly 331 and the evaporator coil temperature collected by the inner coil sensor assembly 341, and controls the air conditioner temperature based on these temperatures. Therefore, in addition to achieving air conditioner temperature control, the first inductor 332 in the ambient temperature detection unit 33 can suppress common-mode and differential-mode noise interference caused by the connecting wires of the ambient temperature sensor assembly 331; and the second inductor 342 in the evaporator coil temperature detection unit 34 can suppress common-mode and differential-mode noise interference caused by the connecting wires of the inner coil sensor assembly 341, thereby improving the EMC test pass rate of the air conditioner.

[0031] The temperature control system provided in this invention acquires the ambient temperature from the ambient temperature sensor assembly and the evaporator coil temperature from the inner coil sensor assembly, and controls the air conditioner temperature based on the ambient temperature and evaporator coil temperature. This system structure not only achieves temperature control of the air conditioner, but also suppresses common-mode and differential-mode noise interference by setting inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit respectively, thereby improving the EMC test pass rate of the air conditioner. Moreover, the structure is simple and has good practical value.

[0032] In the above Figure 3 Based on this, the embodiments of the present invention also provide another temperature control system, wherein the power supply unit 32 is a 5V common power supply, and the first inductor and the second inductor are both 10uH / 1.2A surface mount inductors as an example.

[0033] like Figure 4 As shown, the ambient temperature detection unit 33 also includes a first interface 333 (i.e., the CN1 interface on the substrate); wherein, the first interface 333 includes a first port, a second port and a third port, the first port (i.e., port 1 in the figure) is connected to the first inductor 332 (i.e., L1 in the figure), the second port (i.e., port 3 in the figure) is connected to the control unit 31, and the third port (i.e., port 2 in the figure) is connected to the ambient temperature sensor assembly (not shown).

[0034] The aforementioned ambient temperature sensor assembly includes a first thermistor, which is connected to a third port via a first connecting line. For example, the first thermistor is a 15K thermistor and is fixedly mounted on the structural component of the indoor unit for detecting ambient temperature.

[0035] The aforementioned ambient temperature detection unit 33 further includes a first filtering unit 334, wherein the first filtering unit 334 includes a first resistor, a second resistor, and a first capacitor; as shown above. Figure 4 As shown, the first resistor is R1, the second resistor is R2, the first capacitor is C1, the second port is connected to one end of the first resistor R1 and one end of the second resistor R2 respectively, the other end of the first resistor R1 is connected to one end of the first capacitor C1 and the control unit 31 respectively, and the other end of the first capacitor C1 and the other end of the second resistor R2 are both grounded.

[0036] Similarly, the evaporator coil temperature detection unit 34 also includes a second interface 343 (i.e., the CN2 interface on the substrate); wherein, the second interface 343 includes a fourth port, a fifth port and a sixth port, the fourth port (i.e., port 1 of CN2 in the figure) is connected to the second inductor 342, the fifth port (i.e., port 2 of CN2 in the figure) is connected to the control unit 31, and the sixth port (not shown) is connected to the inner plate sensor assembly (not shown).

[0037] The aforementioned inner-panel sensor assembly includes a second thermistor, which is connected to the sixth port via a second connecting wire. For example, the second thermistor is a 20K thermistor and is fixedly mounted on the evaporator of the indoor unit to detect the evaporator coil temperature. It should be noted that, to ensure proper temperature control, the second thermistor can also be set at the lowest temperature point of the evaporator coil via the second connecting wire; the specific setting can be adjusted according to actual conditions.

[0038] The aforementioned evaporator coil temperature detection unit 34 further includes a second filter unit 344, wherein the second filter unit 344 includes a third resistor, a fourth resistor, and a second capacitor; as shown above. Figure 4 As shown, the third resistor is R3, the fourth resistor is R4, the second capacitor is C2, and the fifth port is connected to one end of the third resistor R3 and one end of the fourth resistor R4 respectively. The other end of the third resistor R3 is connected to one end of the second capacitor C2 and the control unit 31 respectively. The other end of the second capacitor C2 and the other end of the fourth resistor R4 are both grounded.

[0039] Therefore, the aforementioned temperature control system, by setting inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit respectively, suppresses common-mode and differential-mode noise interference, improves the EMC test pass rate of the air conditioner, and the first and second inductors are surface-mount inductors, which can be placed close to the corresponding interface during PCB design, simplifying the installation structure; it can also ensure the temperature control of the air conditioner, improve the user experience, has good practical value, and is easy to promote in practical applications.

[0040] Based on the above embodiments, this invention also provides an air conditioner, which includes an indoor unit and an outdoor unit; wherein the indoor unit is equipped with the aforementioned temperature control system. It should be noted that other components of the indoor unit, such as the evaporator and indoor fan, and the outdoor fan in the outdoor unit, can be configured according to actual conditions, and will not be described in detail here.

[0041] The air conditioner provided in this embodiment of the invention has a control unit that acquires the ambient temperature collected by the ambient temperature sensor assembly and the evaporator coil temperature collected by the inner coil sensor assembly, and controls the temperature of the air conditioner based on the ambient temperature and the evaporator coil temperature. This system structure not only realizes the temperature control of the air conditioner, but also suppresses common-mode and differential-mode noise interference by setting inductors in the ambient temperature detection unit and the evaporator coil temperature detection unit respectively, thereby improving the EMC test pass rate of the air conditioner. Moreover, the structure is simple and has good practical value.

[0042] The air conditioner provided in this embodiment of the invention has the same technical features as the temperature control system provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0043] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the air conditioner described above can be referred to the corresponding process in the aforementioned temperature control system embodiment, and will not be repeated here.

[0044] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0045] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A temperature control system, characterized in that, include: The system includes a control unit, a power supply unit, and an ambient temperature detection unit and an evaporator coil temperature detection unit, which are respectively connected to the control unit. The ambient temperature detection unit and the evaporator coil temperature detection unit are also respectively connected to the power supply unit. The ambient temperature detection unit includes an ambient temperature sensor assembly and a first inductor, and the evaporator coil temperature detection unit includes an inner coil sensor assembly and a second inductor. Both the first inductor and the second inductor are connected to the power supply unit, and both the ambient temperature sensor assembly and the inner coil sensor assembly are also communicatively connected to the control unit. The control unit is used to acquire the ambient temperature collected by the ambient temperature sensor assembly and the evaporator coil temperature collected by the inner plate sensor assembly, and to control the temperature of the air conditioner based on the ambient temperature and the evaporator coil temperature.

2. The temperature control system according to claim 1, characterized in that, Both the first inductor and the second inductor are surface mount inductors that integrate differential and common modes.

3. The temperature control system according to claim 1, characterized in that, The inductance value of the first inductor is 8uH~12uH, and the inductance value of the second inductor is 8uH~12uH.

4. The temperature control system according to claim 1, characterized in that, The ambient temperature detection unit further includes a first interface; wherein the first interface includes a first port, a second port and a third port, the first port is connected to the first inductor, the second port is connected to the control unit, and the third port is connected to the ambient temperature sensor assembly.

5. The temperature control system according to claim 4, characterized in that, The ambient temperature sensor assembly includes a first thermistor, which is connected to the third port via a first connecting line.

6. The temperature control system according to claim 4, characterized in that, The ambient temperature detection unit further includes a first filtering unit, wherein the first filtering unit includes a first resistor, a second resistor, and a first capacitor; The second port is connected to one end of the first resistor and one end of the second resistor, respectively. The other end of the first resistor is connected to one end of the first capacitor and the control unit, respectively. The other end of the first capacitor and the other end of the second resistor are both grounded.

7. The temperature control system according to claim 1, characterized in that, The evaporator coil temperature detection unit further includes a second interface; wherein the second interface includes a fourth port, a fifth port and a sixth port, the fourth port is connected to the second inductor, the fifth port is connected to the control unit, and the sixth port is connected to the inner plate sensor assembly.

8. The temperature control system according to claim 7, characterized in that, The inner disk sensor assembly includes a second thermistor, which is connected to the sixth port via a second connecting line.

9. The temperature control system according to claim 7, characterized in that, The evaporator coil temperature detection unit further includes a second filtering unit, wherein the second filtering unit includes a third resistor, a fourth resistor, and a second capacitor; The fifth port is connected to one end of the third resistor and one end of the fourth resistor, respectively. The other end of the third resistor is connected to one end of the second capacitor and the control unit, respectively. The other ends of the second capacitor and the fourth resistor are both grounded.

10. An air conditioner, characterized in that, It includes an indoor unit and an outdoor unit; wherein the indoor unit is equipped with a temperature control system as described in any one of claims 1 to 9.

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