Indoor unit and multi-split air conditioning system
By setting up multiple refrigerant inlet and outlet pipes in the indoor unit of multiple online air conditioning systems, and equipped with expansion valves and switch valves, the problem of temporary shutdown of the system during refrigerant leakage is solved, and the leakage point inspection and maintenance is realized during normal operation is realized, reducing the impact on user use.
Patent Information
- Application Number
- CN202420366765.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-02-27
AI Technical Summary
In multi-online air conditioning systems, when refrigerant leaks, the entire system needs to be inspected and repaired, resulting in temporary shutdown of the system, affecting the normal use of the user.
An indoor unit is designed, including multiple refrigerant inlet and outlet pipes, which are connected to the indoor heat exchanger respectively, and are equipped with an expansion valve and an on-off valve. By controlling the switches of the refrigerant inlet and outlet pipes, leakage points can be checked and repaired during normal operation of the system.
It realizes missing point inspection and repair in the normal operation of multiple online air conditioning systems, avoids temporary system shutdown and reduces the impact on user use.
Smart Images
Figure CN222597883U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of multi-split air conditioners, and in particular to an indoor unit and a multi-split air conditioner system. Background Art
[0002] A multi-split air conditioning system is an air conditioning system with multiple indoor units and / or multiple outdoor units, and is widely used in industrial places such as office buildings, shopping malls, restaurants, etc. When a refrigerant leaks in a single indoor unit, the multi-split air conditioning system needs to be inspected and repaired as a whole to avoid complete refrigerant leakage in the entire air conditioning system, thereby avoiding greater economic losses and possible abnormal effects on the air conditioning system.
[0003] In the related art, when performing the above-mentioned leak inspection and repair treatment on the multi-split air-conditioning system, the multi-split air-conditioning system needs to be temporarily shut down, so that the multi-split air-conditioning system cannot provide cooling to the user for a long time, causing a great obstruction to the user's normal use needs. Utility Model Content
[0004] The embodiment of the present application provides an indoor unit and a multi-split air-conditioning system. When a refrigerant leak occurs, the leak point can be checked and repaired while the multi-split air-conditioning system is operating normally, thereby avoiding hindering the normal use needs of the user.
[0005] On the one hand, an embodiment of the present application provides an indoor unit, including an indoor heat exchanger, multiple refrigerant inlet pipes and multiple refrigerant outlet pipes, the multiple refrigerant inlet pipes are arranged in parallel and are respectively connected to the refrigerant input ends of the indoor heat exchanger, the multiple refrigerant outlet pipes are arranged in parallel and are respectively connected to the refrigerant output ends of the indoor heat exchanger, each of the refrigerant inlet pipes is provided with an expansion valve, and each of the refrigerant outlet pipes is provided with a switch valve.
[0006] In some embodiments, any of the refrigerant inlet pipes and any of the refrigerant outlet pipes are connected through the indoor heat exchanger.
[0007] In some embodiments, the plurality of refrigerant inlet pipes and the plurality of refrigerant outlet pipes are equal in number and are connected and arranged one-to-one through the indoor heat exchanger.
[0008] In some embodiments, the expansion valve is an electronic expansion valve.
[0009] In some embodiments, the switch valve is a solenoid valve.
[0010] In some embodiments, the indoor unit further includes an indoor heat exchange duct and an indoor fan, and the indoor heat exchanger and the indoor fan are respectively arranged in the indoor heat exchange duct.
[0011] On the other hand, an embodiment of the present application provides a multi-split air-conditioning system, comprising a plurality of the indoor units, wherein the plurality of indoor units are arranged in parallel.
[0012] In some embodiments, the multi-split air conditioning system further includes at least one outdoor unit, the multiple refrigerant inlet pipes are connected in parallel to the refrigerant input end of the outdoor unit, and the multiple refrigerant outlet pipes are connected in parallel to the refrigerant input end of the outdoor unit.
[0013] In some embodiments, the multi-split air conditioning system includes a plurality of outdoor units, and each of the outdoor units is correspondingly arranged with at least one of the indoor units.
[0014] In some embodiments, the multi-split air-conditioning system further includes a refrigerant monitoring device, which is configured to detect the amount of refrigerant in the multi-split air-conditioning system and send a feedback electrical signal when an abnormal amount of refrigerant in the multi-split air-conditioning system is detected.
[0015] In the embodiment of the present application, multiple refrigerant inlet pipes, multiple refrigerant outlet pipes, expansion valves and switch valves are arranged in the indoor unit. When a refrigerant leak occurs in the multi-split air-conditioning system, the indoor unit can be controlled to close most of the refrigerant inlet pipes and refrigerant outlet pipes at the same time, and only one refrigerant inlet pipe and one refrigerant outlet pipe can be opened. Without shutting down the indoor unit and the multi-split air-conditioning system, it can be determined whether the refrigerant inlet pipes and refrigerant outlet pipes that remain opened have leaks. By repeating the above-mentioned leak inspection process, the leak inspection procedure for all refrigerant inlet pipes and refrigerant outlet pipes in the indoor unit can be completed. During this period, there is no need to temporarily shut down the indoor unit and the multi-split air-conditioning system, so that the multi-split air-conditioning system and the working indoor units therein can maintain normal operation, avoiding obstruction to the normal use needs of users. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 is a connection structure diagram of an indoor unit provided in some embodiments of the present application;
[0018] Figure 2 This is another connection structure diagram of the indoor unit provided in some embodiments of the present application.
[0019] Description of main component symbols:
[0020] 11-indoor heat exchanger, 12-refrigerant inlet pipe, 13-refrigerant outlet pipe, 14-expansion valve, 15-on / off valve, 16-indoor fan. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0023] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.
[0024] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond the stated values in practice.
[0025] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.
[0026] like Figure 1 and Figure 2 As shown, on the one hand, an embodiment of the present application provides an indoor unit, which can be inspected and repaired for leaks when a refrigerant leak occurs while the multi-split air-conditioning system is operating normally, thereby avoiding obstruction to the user's normal use needs.
[0027] Here, the indoor unit includes an indoor heat exchanger 11, a plurality of refrigerant inlet pipes 12, and a plurality of refrigerant outlet pipes 13. When the indoor unit is used for heating, the indoor heat exchanger 11 serves as a condenser; and when the indoor unit is used for cooling, the indoor heat exchanger 11 serves as an evaporator. The type of the indoor heat exchanger 11 can be determined according to actual needs, and can be, for example, a tube heat exchanger, a plate heat exchanger, a fin heat exchanger, etc., which is not limited in the embodiments of the present application.
[0028] The above-mentioned multiple refrigerant inlet pipes 12 are arranged in parallel and are respectively connected to the refrigerant input end of the indoor heat exchanger 11 to form multiple refrigerant input branches, and then the refrigerant can be respectively transported to the indoor heat exchanger 11 through the multiple refrigerant input branches. Here, each refrigerant inlet pipe 12 is provided with an expansion valve 14 for throttling the refrigerant flowing through the refrigerant inlet pipe 12. The expansion valve 14 can control the refrigerant flow entering the indoor heat exchanger 11 according to the state change of the indoor heat exchanger 11.
[0029] The above-mentioned multiple refrigerant outlet pipes 13 are arranged in parallel and are respectively connected to the refrigerant output ends of the indoor heat exchanger 11 to form multiple refrigerant output branches, and then the refrigerant in the indoor heat exchanger 11 can be discharged respectively through multiple refrigerant input branches. Here, each refrigerant outlet pipe 13 is provided with a switch valve 15 for controlling the on-off of the refrigerant outlet pipe 13. When the switch valve 15 is opened, the refrigerant outlet pipe 13 where the switch valve 15 is located remains ventilated, and the refrigerant in the indoor heat exchanger 11 can be discharged from the refrigerant outlet pipe 13 where the switch valve 15 is located; and when the switch valve 15 is closed, the refrigerant outlet pipe 13 where the switch valve 15 is located remains closed, and the refrigerant in the indoor heat exchanger 11 cannot be discharged from the refrigerant outlet pipe 13 where the switch valve 15 is located.
[0030] When a refrigerant leak occurs in the multi-split air-conditioning system where the indoor unit provided in the embodiment of the present application is located, the indoor unit can be controlled to close most of the refrigerant inlet pipes 12 and the refrigerant outlet pipes 13 at the same time, and only open one refrigerant inlet pipe 12 and one refrigerant outlet pipe 13, so as to determine whether the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 that remain open have leaks without shutting down the indoor unit and the multi-split air-conditioning system; when it is determined that there are no leaks in the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 that remain open, the serial numbers of the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 that remain open can be switched and the above-mentioned leak inspection process can be repeated until the leak inspection procedure for all the refrigerant inlet pipes 12 and the refrigerant outlet pipes 13 in the indoor unit is completed; the above-mentioned leak inspection process does not require temporary shutdown of the indoor unit and the multi-split air-conditioning system, so that the multi-split air-conditioning system and the indoor units that are working therein maintain normal operation, avoiding obstruction to the normal use needs of users.
[0031] The corresponding setting relationship between the multiple refrigerant inlet pipes 12 and the multiple refrigerant outlet pipes 13 can be determined according to actual needs, and the embodiments of the present application do not limit this. In some embodiments, any refrigerant inlet pipe 12 and any refrigerant outlet pipe 13 can be connected through the indoor heat exchanger 11. In other words, the refrigerants of the above-mentioned multiple refrigerant inlet pipes 12 are input into the same refrigerant cavity of the indoor heat exchanger 11, and then discharged from the refrigerant cavity from the multiple refrigerant outlet pipes 13 respectively, so that the multiple refrigerant inlet pipes 12 are respectively connected to the refrigerant cavity, and the multiple refrigerant outlet pipes 13 are respectively connected to the refrigerant cavity.
[0032] In other embodiments, the plurality of refrigerant inlet pipes 12 and the plurality of refrigerant outlet pipes 13 may be provided in equal numbers and connected one-to-one through the indoor heat exchanger 11. In other words, each refrigerant inlet pipe 12 has its own corresponding refrigerant outlet pipe 13; the refrigerant flowing into the indoor heat exchanger 11 from the refrigerant inlet pipe 12 is then discharged from a refrigerant outlet pipe 13 corresponding to the refrigerant inlet pipe 12.
[0033] The number of the refrigerant inlet pipes 12 can be determined according to actual needs, and can be two, three or more than three, which is not limited in the present embodiment. Similarly, the number of the refrigerant outlet pipes 13 can be determined according to actual needs, and can be two, three or more than three, which is not limited in the present embodiment.
[0034] The type of the expansion valve 14 can be determined according to actual needs, and can be, for example, a mechanical expansion valve 14, an electronic expansion valve 14, etc., which is not limited in the embodiment of the present application. In some embodiments, the expansion valve 14 can be an electronic expansion valve 14, which is easy to control the circuit. The type of the switch valve 15 can be determined according to actual needs, which is not limited in the embodiment of the present application. In some embodiments, the switch valve 15 can be a solenoid valve, which is easy to control the circuit.
[0035] In some embodiments, the indoor unit may further include an indoor heat exchange duct and an indoor fan 16, wherein the indoor heat exchanger 11 and the indoor fan 16 are respectively disposed in the indoor heat exchange duct. In this way, the indoor ambient air can be sucked into the indoor heat exchange duct, and the temperature and humidity are adjusted when passing through the indoor heat exchanger 11, and then sent back into the indoor environment through the indoor fan 16 to meet the air conditioning needs of the indoor environment.
[0036] On the other hand, an embodiment of the present application provides a multi-split air conditioning system, which includes a plurality of indoor units provided by any of the above embodiments, and the plurality of indoor units are arranged in parallel and can work independently. Since the multi-split air conditioning system has the above indoor units, the leak point can be inspected and repaired under normal operation, so that the multi-split air conditioning system does not need to be temporarily shut down, avoiding obstruction to the normal use needs of users.
[0037] In some embodiments, the multi-split air conditioning system may further include at least one outdoor unit. A plurality of refrigerant inlet pipes 12 are connected in parallel to the refrigerant input end of the outdoor unit, and a plurality of refrigerant outlet pipes 13 are connected in parallel to the refrigerant input end of the outdoor unit, so that the outdoor unit and the indoor unit are connected to form a complete refrigeration cycle. Here, the outdoor unit may be provided with components required for the refrigeration cycle, such as a compressor, an outdoor heat exchanger, and a reversing valve.
[0038] The number of outdoor units can be determined according to actual needs, and the embodiments of the present application do not limit this. In some examples, the multi-split air conditioning system may include only one outdoor unit, forming a one-to-many system structure. In other examples, the multi-split air conditioning system may include multiple outdoor units, each outdoor unit and at least one indoor unit are correspondingly arranged, so that each outdoor unit is in a relatively ideal workload range, thereby improving the working performance of the multi-split air conditioning system.
[0039] In some embodiments, the multi-split air conditioning system may further include a refrigerant monitoring device. The refrigerant monitoring device is configured to detect the amount of refrigerant in the multi-split air conditioning system and send a feedback electrical signal when an abnormal amount of refrigerant in the multi-split air conditioning system is detected. The refrigerant monitoring device can be used to continuously monitor the amount of refrigerant in the multi-split air conditioning system, timely detect possible refrigerant leakage problems in the system, and then promptly control the indoor unit to respond.
[0040] The indoor unit and multi-split air-conditioning system provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. An indoor unit, characterized in that: It includes an indoor heat exchanger, multiple refrigerant inlet pipes and multiple refrigerant outlet pipes. The multiple refrigerant inlet pipes are arranged in parallel and are respectively connected to the refrigerant input end of the indoor heat exchanger. The multiple refrigerant outlet pipes are arranged in parallel and are respectively connected to the refrigerant output end of the indoor heat exchanger. Each of the refrigerant inlet pipes is provided with an expansion valve, and each of the refrigerant outlet pipes is provided with a switch valve.
2. The indoor unit according to claim 1, characterized in that: Any of the refrigerant inlet pipes and any of the refrigerant outlet pipes are connected through the indoor heat exchanger.
3. The indoor unit according to claim 1, characterized in that: The plurality of refrigerant inlet pipes and the plurality of refrigerant outlet pipes are equal in number and are connected and arranged one-to-one through the indoor heat exchanger.
4. The indoor unit according to claim 1, characterized in that: The expansion valve is an electronic expansion valve.
5. The indoor unit according to claim 1, characterized in that: The switch valve is a solenoid valve.
6. The indoor unit according to claim 1, characterized in that: The indoor unit further comprises an indoor heat exchange duct and an indoor fan, and the indoor heat exchanger and the indoor fan are respectively arranged in the indoor heat exchange duct.
7. A multi-split air conditioning system, characterized in that: The invention comprises a plurality of indoor units according to any one of claims 1 to 6, wherein the plurality of indoor units are arranged in parallel.
8. The multi-split air conditioning system according to claim 7, characterized in that: The multi-split air conditioning system further includes at least one outdoor unit, the multiple refrigerant inlet pipes are connected in parallel to the refrigerant input end of the outdoor unit, and the multiple refrigerant outlet pipes are connected in parallel to the refrigerant input end of the outdoor unit.
9. The multi-split air conditioning system according to claim 8, characterized in that: The multi-split air conditioning system includes a plurality of outdoor units, and each of the outdoor units is correspondingly arranged with at least one of the indoor units.
10. The multi-split air conditioning system according to claim 7, characterized in that: The multi-split air-conditioning system further comprises a refrigerant monitoring device, which is configured to detect the amount of refrigerant in the multi-split air-conditioning system and to send a feedback electrical signal when an abnormal amount of refrigerant in the multi-split air-conditioning system is detected.