Air conditioner terminal structure and air conditioner

Abstract

The air conditioner terminal structure comprises a motor and a heat exchanger, and a first air outlet of the motor is communicated with a second air inlet of the heat exchanger. A first air inlet of the motor is communicated with a second air outlet of the heat exchanger through a bypass pipeline; the bypass pipeline is provided with a first control element corresponding to the second air outlet, and the first control element is used for preventing cold air output by the second air outlet from entering the bypass pipeline; the bypass pipeline is further provided with a third air inlet communicated with the outside, a second control element is arranged in the third air inlet, and the second control element is used for preventing outside air from entering the bypass pipeline. According to the air conditioner terminal structure, the first control element and the second control element can be correspondingly opened or closed, so that part of cold air output by the second air outlet of the heat exchanger or mixed air formed by mixing the part of cold air with external air cools the motor, frequent start and stop caused by too high temperature of the motor are avoided, the comfort of a user is improved, and the service life of the motor is prolonged. And the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to an air-conditioning terminal structure and an air-conditioning. Background Art

[0002] The air conditioning terminal unit is the part of the air conditioning system that comes into direct contact with the indoor environment. It is responsible for providing cooling or heating to the room, regulating indoor temperature and humidity, and thus improving indoor air quality. Air conditioning terminal units are widely used in hotels, office buildings, hospitals, commercial and residential buildings, and research institutions.

[0003] The motor in the air conditioner's terminal structure sends indoor air, or a mixture of indoor and outdoor air, into the heat exchanger. The heat exchange medium circulating within the heat exchanger then cools the air before returning it to the room, lowering the indoor temperature to meet user comfort requirements. However, the motor generates heat during operation. After continuous operation for a period of time, the motor's heat can reach its limit, shortening its lifespan and even causing burnout.

[0004] To solve this problem, the current common solution is to shut down the motor when it reaches the temperature limit and restart it after the temperature drops. However, this method will cause the motor to start and stop frequently when the temperature is too high, which will not only greatly reduce user comfort but also affect the life of the motor.

[0005] Therefore, how to provide an air-conditioning terminal structure that can effectively reduce the motor temperature without frequent starting and stopping is an urgent problem to be solved. Utility Model Content

[0006] The utility model provides an air-conditioning terminal structure and an air-conditioning, which are used to solve the problem in the prior art that the motor of the air-conditioning terminal structure frequently starts and stops due to excessive temperature.

[0007] The technical solution of the utility model is an air conditioner terminal structure, comprising a motor and a heat exchanger, wherein the first air outlet of the motor is communicated with the second air inlet of the heat exchanger; the first air inlet of the motor is communicated with the second air outlet of the heat exchanger through a bypass pipe;

[0008] The bypass duct is provided with a first control element corresponding to the second air outlet, and the first control element is used to prevent the cold air output from the second air outlet from entering the bypass duct;

[0009] The bypass duct is further provided with a third air inlet communicating with the outside, and a second control element is provided in the third air inlet, and the second control element is used to prevent outside air from entering the bypass duct.

[0010] Furthermore, the bypass duct is provided with an exhaust device corresponding to the first air inlet of the motor, and the exhaust device is used to draw the air in the bypass duct into the first air inlet.

[0011] Furthermore, a first temperature sensor is provided on the surface of the motor, and the first temperature sensor is used to detect the motor temperature of the motor.

[0012] Furthermore, the air-conditioning terminal structure is also provided with a second temperature sensor, and the second temperature sensor is used to detect the external ambient temperature.

[0013] Furthermore, the operating modes of the air-conditioning terminal structure include a standard mode, a first motor cooling mode, and a second motor cooling mode;

[0014] Wherein, the standard mode is: the first control element and the second control element are both closed;

[0015] The first motor cooling mode is: the first control element is turned on and the second control element is turned off;

[0016] The second motor cooling mode is: the first control element and the second control element are both opened.

[0017] Furthermore, the bypass pipe is located above the motor and the heat exchanger.

[0018] Furthermore, the first control element adopts at least one of an electric air valve, an electric butterfly valve and an electric ball valve.

[0019] Furthermore, the second control element adopts at least one of an electric air valve, an electric butterfly valve and an electric ball valve.

[0020] Furthermore, the opening angles of the first control element and the second control element are both 0-90°.

[0021] The present utility model also provides an air conditioner, which includes the air conditioner terminal structure described above.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] The air-conditioning terminal structure of the present invention can open or close the first control element and the second control element accordingly, so that part of the cold air output by the second air outlet of the heat exchanger, or the mixed air formed by mixing with the outside air, cools the motor, avoiding frequent starting and stopping due to excessively high motor temperature, improving user comfort and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in the specification of the application are intended only to describe specific embodiments and are not intended to limit this invention; the terms "including" and "having," as well as any variations thereof, in the specification and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the specification and claims of this invention and the accompanying drawings are used to distinguish between different objects, not to describe a specific order.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions 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.

[0026] Figure 1 This is a structural diagram of the air-conditioning terminal structure proposed by the present invention in a standard mode;

[0027] Figure 2 This is a structural diagram of the air-conditioning terminal structure proposed by the present invention in the first motor cooling mode;

[0028] Figure 3 This is a structural diagram of the air-conditioning terminal structure proposed by the present invention in the second motor cooling mode;

[0029] Figure 4 This is one of the flow charts of the air-conditioning terminal structure proposed in the present utility model;

[0030] Figure 5 This is another flow chart of the air-conditioning terminal structure proposed in the present invention.

[0031] Reference numerals:

[0032] 10. Motor;

[0033] 101, first air inlet;

[0034] 20. Heat exchanger;

[0035] 201. Second air outlet

[0036] 30. Bypass pipe;

[0037] 301, third air inlet; 302, air outlet duct;

[0038] 40. First control element;

[0039] 50. Second control element;

[0040] 60. Exhaust device;

[0041] 70. A first temperature sensor;

[0042] 80. Second temperature sensor. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly stated. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0044] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0045] Example 1

[0046] The air conditioning terminal unit is the part of the air conditioning system that comes into direct contact with the indoor environment. It is responsible for providing cooling or heating to the room, regulating indoor temperature and humidity, and thus improving indoor air quality. Air conditioning terminal units are widely used in hotels, office buildings, hospitals, commercial and residential buildings, and research institutions.

[0047] The motor in the air conditioner's terminal structure sends indoor air, or a mixture of indoor and outdoor air, into the heat exchanger. The heat exchange medium (cooling water or hot water) flowing through the heat exchanger then cools or heats the air before sending it back into the room, lowering or raising the indoor temperature to meet user comfort requirements. However, the motor generates heat during operation. After continuous operation for a period of time, the motor's heat can reach its limit, shortening its lifespan and even causing burnout.

[0048] To solve this problem, the current common solution is to shut down the motor when it reaches the temperature limit and restart it after the temperature drops. However, this method will cause the motor to start and stop frequently when the temperature is too high, which will not only greatly reduce user comfort but also affect the life of the motor.

[0049] Therefore, in order to solve the above problems, refer to the attached Figure 1-3The present invention proposes an air conditioning terminal structure that can effectively reduce the motor temperature T3 without frequent starting and stopping of the motor 10, including the motor 10 and the heat exchanger 20. The first air outlet of the motor 10 is connected to the second air inlet of the heat exchanger 20; the first air inlet 101 of the motor 10 is connected to the second air outlet 201 of the heat exchanger 20 through a bypass pipe 30;

[0050] The bypass duct 30 is provided with a first control element 40 corresponding to the second air outlet 201 , and the first control element 40 is used to prevent the cold air output from the second air outlet 201 from entering the bypass duct 30 ;

[0051] The bypass duct 30 is further provided with a third air inlet 301 communicating with the outside, and a second control element 50 is provided in the third air inlet 301 . The second control element 50 is used to block the outside air from entering the bypass duct 30 .

[0052] It should be noted that the air conditioning terminal structure of this embodiment is also provided with a main control unit (not shown, the same as above), which is electrically connected to the motor 10, the heat exchanger 20, the first control element 40 and the second control element 50. The second air outlet 201 of the heat exchanger 20 is also connected to the room through the air outlet duct 302, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20 is transported to the room through the air outlet duct 302 to cool the room; the bypass duct 30 is also connected to the air outlet duct 302, and the side of the bypass duct 30 close to the air outlet duct 302 is provided with a first control element 40.

[0053] In this way, when the air conditioning terminal structure operates normally, and the motor 10 continues to generate heat during operation, the air conditioning terminal structure has the following two motor cooling modes:

[0054] In the first motor cooling mode, the main control unit fully opens the first control element 40 and closes the second control element 50, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20 is directly input to the first air inlet 101 of the motor 10 through the bypass pipe 30, so as to quickly cool down the motor 10 and prevent the motor 10 from burning due to the excessively high motor temperature T3.

[0055] In the second motor cooling mode, the main control unit opens the first control element 40 and the second control element 50, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20 and the external air input from the third air inlet 301 are mixed in the bypass duct 30 to form mixed air, and then the mixed air is input to the first air inlet 101 of the motor 10 to cool the motor 10, so as to prevent the motor temperature T3 of the motor 10 from dropping too fast, causing the motor temperature T3 to be too low and affecting the performance of the motor 10.

[0056] Therefore, when the motor temperature T3 of the motor 10 proposed in the present invention reaches a preset value, the air-conditioning terminal structure will correspondingly open or close the first control element 40 and the second control element 50, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20, or the mixed air formed by the outside air and part of the cold air output from the second air outlet 201 of the heat exchanger 20, cools the motor 10, avoiding frequent starting and stopping due to excessively high motor temperature T3, thereby improving user comfort and extending the service life of the motor 10.

[0057] In order to ensure that the air in the bypass duct 30 can be input into the first air inlet 101 of the motor 10 more quickly to cool the motor 10, refer to the attached Figure 1 The bypass duct 30 is provided with an exhaust device 60 corresponding to the first air inlet 101 of the motor 10 , and the exhaust device 60 is used to draw the air in the bypass duct 30 into the first air inlet 101 .

[0058] In this way, when the main control unit controls the first control element 40 to be fully opened or controls both the first control element 40 and the second control element 50 to be opened, the main control unit will also start the exhaust device 60 accordingly so that the air in the bypass duct 30 can be input into the first air inlet 101 of the motor 10 more quickly, thereby improving the cooling efficiency of the motor 10.

[0059] In order to ensure that the air conditioner terminal structure can more accurately detect the motor temperature T3 of the motor 10, refer to the attached Figure 1 A first temperature sensor 70 is further provided on the surface of the motor 10 . The first temperature sensor 70 is used to detect the motor temperature T3 of the motor 10 in real time.

[0060] It should be noted that the first temperature sensor 70 is electrically connected to the main control unit. The first temperature sensor 70 can detect the motor temperature T3 of the motor 10 in real time, and transmit the detected motor temperature T3 to the main control unit in real time, so that the main control unit can fully open the first control element 40 according to the motor temperature T3, or open the first control element 40 and the second control element 50.

[0061] Among them, refer to the attached Figure 1 The air-conditioning terminal structure is further provided with a second temperature sensor 80, which is used to detect the external ambient temperature T4 in real time.

[0062] It should be noted that the second temperature sensor 80 is electrically connected to the main control unit. The second temperature sensor 80 can detect the external ambient temperature T4 in real time and transmit the detected ambient temperature T4 to the main control unit in real time, so that the main control unit can adjust the opening angle of the first control element 40 and the second control element 50 according to the ambient temperature T4, thereby reducing the energy consumption of the air-conditioning terminal structure.

[0063] In order to ensure the compactness of the air-conditioning terminal structure and reduce the space occupied by the air-conditioning terminal structure, refer to the attached Figure 1 The bypass pipe 30 is located above the motor 10 and the heat exchanger 20 .

[0064] The first control element 40 is at least one of an electric air valve, an electric butterfly valve and an electric ball valve.

[0065] The second control element 50 is at least one of an electric damper, an electric butterfly valve and an electric ball valve.

[0066] In this way, the first control element 40 and the second control element 50 in this embodiment are preferably electric air valves, so that the first control element 40 and the second control element 50 can accurately adjust the air volume and dynamically adjust the valve opening according to actual needs, thereby avoiding unnecessary energy waste and improving energy efficiency; and can also realize remote control and automatic operation, reduce manual intervention, and improve the reliability and efficiency of the system.

[0067] To ensure that the first control element 40 and the second control element 50 can dynamically adjust the valve opening according to the motor temperature T3 , the opening angles of the first control element 40 and the second control element 50 are both 0-90°.

[0068] The operating modes of the air-conditioning terminal structure include a standard mode, a first motor cooling mode, and a second motor cooling mode;

[0069] The standard mode is as follows: both the first control element 40 and the second control element 50 are closed;

[0070] The first motor cooling mode is: the first control element 40 is fully open and the second control element 50 is closed;

[0071] The second motor cooling mode is: the first control element 40 and the second control element 50 are both opened.

[0072] Specifically, refer to the attached Figure 4 The main control unit pre-stores preset values ​​of the motor 10 (the preset values ​​include a temperature limit T1 and a safety temperature limit T2, and T1>T2).

[0073] When the air-conditioning terminal structure operates normally, the motor 10 also operates normally accordingly. After the motor 10 runs for a predetermined time, the main control unit obtains the motor temperature T3 of the motor 10 in real time through the first temperature sensor 70. If T3 is less than T2 at this time, it indicates that the motor 10 does not need to be cooled. The main control unit controls the first control element 40 and the second control element 50 to remain in the closed state, that is, the motor 10 is in the standard mode at this time.

[0074] If T3≥T1, the control unit controls the first control element 40 to be fully opened, the second control element 50 to be closed, and the exhaust device 60 to be started, causing part of the cold air output from the second air outlet 201 of the heat exchanger 20 to be directly input into the first air inlet 101 of the motor 10 through the bypass pipe 30, so as to quickly cool down the motor 10 and prevent the motor 10 from burning due to the excessively high motor temperature T3. That is, at this time, the motor 10 is in the first motor cooling mode.

[0075] If T2≤T3<T1, the control unit controls the first control element 40 and the second control element 50 to open, and starts the exhaust device 60, so that the cold air output from the second air outlet 201 of the heat exchanger 20 and the external air input from the third air inlet 301 are mixed in the bypass duct 30, and then input together to the first air inlet 101 of the motor 10 to cool the motor 10, so as to prevent the motor temperature T3 of the motor 10 from dropping too fast, causing the motor temperature T3 to be too low and affecting the performance of the motor 10, that is, the motor 10 is in the second motor cooling mode at this time.

[0076] In order to prevent the motor temperature T3 from being too low and affecting the performance of the motor 10, and to avoid losing too much cooling capacity, and to improve the energy consumption of the air conditioning terminal structure, refer to the attached Figure 5 , the second motor cooling mode is divided into the following situations:

[0077] First, if T4≤T3<30%×T2, it indicates that the motor temperature T3 of the motor 10 is relatively low, so a higher temperature of the mixed air can be applied. Therefore, the control unit controls the first control element 40 to open the first preset angle a1, the second control element 50 to open the second preset angle b2, and starts the exhaust device 60, causing the second air outlet 201 of the heat exchanger 20 to input a small amount of cold air into the bypass duct 30, and the third air inlet 301 to input a medium amount of external air into the bypass duct 30, which is then mixed to form mixed air and then input into the first air inlet 101 of the motor 10, thereby cooling the motor 10.

[0078] Secondly, if 30%×T2≤T3<60%×T2, it indicates that the motor temperature T3 of the motor 10 is medium to high, so the temperature of the mixed air can be applied if it is medium to low. Therefore, the control unit controls the first control element 40 to open the first preset angle a2, the second control element 50 to open the second preset angle b1, and starts the exhaust device 60, causing the second air outlet 201 of the heat exchanger 20 to input a medium amount of cold air into the bypass duct 30, and the third air inlet 301 to input a small amount of external air into the bypass duct 30, which is then mixed to form mixed air and then input into the first air inlet 101 of the motor 10, thereby cooling the motor 10.

[0079] Third, if 60%×T2≤T3<T1, it indicates that the motor temperature T3 of the motor 10 is relatively high, so the temperature of the mixed air can be applied at a lower temperature. Therefore, the control unit controls the first control element 40 to be fully opened, the second control element 50 to open the second preset angle b1, and the exhaust device 60 is started, causing the second air outlet 201 of the heat exchanger 20 to input a large amount of cold air into the bypass duct 30, and the third air inlet 301 to input a small amount of external air into the bypass duct 30, which is then mixed to form mixed air and then input into the first air inlet 101 of the motor 10, thereby cooling the motor 10.

[0080] Finally, the main control unit needs to detect the motor temperature T3 of the motor 10 once every preset time interval and cycle according to the above steps. Then, when the air-conditioning terminal structure is closed, it switches to the standard mode and ends the operation.

[0081] It should be noted that, in this embodiment, the first preset angle a1 is preferably 30°, the first preset angle a2 is preferably 60°, and the fully opened angle is preferably 90°; the first preset angle b1 is preferably 30°, and the first preset angle b2 is preferably 60°.

[0082] Example 2

[0083] The present utility model also provides an air conditioner, which includes the air conditioner terminal structure described above.

[0084] When the air conditioner is started normally, the air conditioner terminal structure also operates normally, and the motor 10 will continue to generate heat during operation. Figure 4 , at this time the air conditioning terminal structure has the following operating modes:

[0085] First, in standard mode, the motor 10 does not need to be cooled, the main control unit turns off the first control element 40 and the second control element 50, and the cold air output from the second air outlet 201 of the heat exchanger 20 is output to the outside (the outside in this embodiment refers to the room where the air-conditioning terminal structure is installed).

[0086] Secondly, in the first motor cooling mode, the main control unit fully opens the first control element 40 and closes the second control element 50, starts the exhaust device 60, and allows part of the cold air output from the second air outlet 201 of the heat exchanger 20 to be directly input into the first air inlet 101 of the motor 10 through the bypass pipe 30 to cool the motor 10, so that the motor 10 can be cooled quickly to prevent the motor 10 from burning due to the excessively high motor temperature T3.

[0087] Third, in the second motor cooling mode, the main control unit opens the first control element 40 and the second control element 50, and starts the exhaust device 60, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20 and the external air input from the third air inlet 301 are mixed in the bypass duct 30 to form mixed air, and then the mixed air is input to the first air inlet 101 of the motor 10 to cool the motor 10, so as to prevent the motor temperature T3 of the motor 10 from dropping too fast, causing the motor temperature T3 to be too low and affecting the performance of the motor 10.

[0088] Therefore, when the motor temperature T3 of the motor 10 proposed in the present invention reaches a preset value, the air-conditioning terminal structure will correspondingly open or close the first control element 40 and the second control element 50, so that part of the cold air output from the second air outlet 201 of the heat exchanger 20, or the mixed air formed by the outside air and part of the cold air output from the second air outlet 201 of the heat exchanger 20, cools the motor 10, avoiding frequent starting and stopping due to excessively high motor temperature T3, thereby improving user comfort and extending the service life of the motor 10.

[0089] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. An air conditioner terminal structure, comprising a motor (10) and a heat exchanger (20), wherein a first air outlet of the motor (10) is connected to a second air inlet of the heat exchanger (20); characterized in that: The first air inlet (101) of the motor (10) is in communication with the second air outlet (201) of the heat exchanger (20) via a bypass pipe (30); The bypass duct (30) is provided with a first control element (40) corresponding to the second air outlet (201), and the first control element (40) is used to prevent the cold air output from the second air outlet (201) from entering the bypass duct (30); The bypass duct (30) is further provided with a third air inlet (301) communicating with the outside, and a second control element (50) is provided in the third air inlet (301), and the second control element (50) is used to prevent outside air from entering the bypass duct (30).

2. The air conditioner terminal structure according to claim 1, characterized in that: The bypass duct (30) is provided with an exhaust device (60) corresponding to the first air inlet (101) of the motor (10), and the exhaust device (60) is used to draw air in the bypass duct (30) into the first air inlet (101).

3. The air conditioner terminal structure according to claim 1, characterized in that: A first temperature sensor (70) is also provided on the surface of the motor (10), and the first temperature sensor (70) is used to detect the motor temperature of the motor (10).

4. The air conditioner terminal structure according to claim 1, characterized in that: The air-conditioning terminal structure is further provided with a second temperature sensor (80), and the second temperature sensor (80) is used to detect the external ambient temperature.

5. The air conditioner terminal structure according to claim 1, characterized in that: The operating modes of the air conditioning terminal structure include a standard mode, a first motor cooling mode, and a second motor cooling mode; Wherein, the standard mode is: the first control element (40) and the second control element (50) are both closed; The first motor cooling mode is: the first control element (40) is turned on, and the second control element (50) is turned off; The second motor cooling mode is: the first control element (40) and the second control element (50) are both opened.

6. The air conditioner terminal structure according to claim 1, characterized in that: The bypass pipe (30) is located above the motor (10) and the heat exchanger (20).

7. The air conditioner terminal structure according to claim 1, characterized in that: The first control element (40) is at least one of an electric air valve, an electric butterfly valve and an electric ball valve.

8. The air conditioner terminal structure according to claim 1, characterized in that: The second control element (50) is at least one of an electric air valve, an electric butterfly valve and an electric ball valve.

9. The air conditioner terminal structure according to claim 1, characterized in that: The opening angles of the first control element (40) and the second control element (50) are both 0-90°.

10. Air conditioner, characterized in that The air conditioner includes the air conditioner terminal structure according to any one of claims 1 to 9.

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