CN107763911B - Method and device for judging refrigerant filling of air-conditioning heat pump system - Google Patents
Method and device for judging refrigerant filling of air-conditioning heat pump system Download PDFInfo
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- CN107763911B CN107763911B CN201711000495.8A CN201711000495A CN107763911B CN 107763911 B CN107763911 B CN 107763911B CN 201711000495 A CN201711000495 A CN 201711000495A CN 107763911 B CN107763911 B CN 107763911B
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Abstract
The invention discloses a method and a device for judging the refrigerant charging of an air-conditioning heat pump system, wherein the method comprises the following steps: detecting the exhaust temperature Tp0 and the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling, and detecting the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process; acquiring a temperature difference delta Tp between an exhaust temperature Tp and an exhaust temperature Tp0, and acquiring a pressure difference delta Pc between exhaust pressure Pc and exhaust pressure Pc 0; and judging whether the refrigerant tank has refrigerant loss or not according to the temperature difference delta Tp and the pressure difference delta Pc. According to the method provided by the embodiment of the invention, whether the refrigerant exists in the refrigerant tank can be intelligently judged according to the exhaust temperature and the exhaust pressure before and after the refrigerant is filled, so that the refrigerant tank can be replaced in time when no refrigerant exists.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method for judging when a refrigerant is filled into an air-conditioning heat pump system and a device for filling the refrigerant into the air-conditioning heat pump system.
Background
During the operation of the air-conditioning heat pump system, if refrigerant leakage occurs, the operation effect of the air-conditioning and the service life of the unit are affected, and at the moment, the system needs to be filled with the refrigerant. During the process of filling the system with the refrigerant, the problem that the refrigerant tank has no refrigerant may occur, so that the system cannot be filled with the refrigerant.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, a first object of the present invention is to provide a method for determining refrigerant charge of an air-conditioning heat pump system, which can intelligently determine whether there is any refrigerant in a refrigerant tank, so as to replace the refrigerant tank in time when there is no refrigerant.
A second object of the invention is to propose a non-transitory computer-readable storage medium.
The third purpose of the invention is to provide a device for filling the refrigerant into the air-conditioning heat pump system.
In order to achieve the above object, a first embodiment of the present invention provides a method for determining refrigerant charging of an air-conditioning heat pump system, where a device for charging refrigerant into the air-conditioning heat pump system includes a refrigerant tank, a refrigerant charging pipe connecting the refrigerant tank to a refrigerant circulation flow path of the air-conditioning heat pump system, and a charging valve disposed on the refrigerant charging pipe, and the method includes the following steps: detecting the exhaust temperature Tp0 and the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling, and detecting the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process; acquiring a temperature difference delta Tp between an exhaust temperature Tp and an exhaust temperature Tp0, and acquiring a pressure difference delta Pc between exhaust pressure Pc and exhaust pressure Pc 0; and judging whether the refrigerant tank has refrigerant loss or not according to the temperature difference delta Tp and the pressure difference delta Pc.
According to the method for judging the refrigerant filling of the air-conditioning heat pump system, firstly, the exhaust temperature Tp0 and the exhaust pressure Pc0 of the air-conditioning heat pump system before the refrigerant filling are detected, the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system are detected in real time in the refrigerant filling process, then, the temperature difference delta Tp between the exhaust temperature Tp and the exhaust temperature Tp0 is obtained, the pressure difference delta Pc between the exhaust pressure Pc and the exhaust pressure Pc0 is obtained, and finally, whether the refrigerant tank has refrigerant loss is judged according to the temperature difference delta Tp and the pressure difference delta Pc. The method can intelligently judge whether the refrigerant tank has the refrigerant or not so as to replace the refrigerant tank in time when no refrigerant exists.
In addition, the method for judging when the refrigerant is filled into the air-conditioning heat pump system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, when the temperature difference Δ Tp is less than or equal to a preset temperature threshold and the pressure difference Δ Pc is less than or equal to a preset pressure threshold, it is determined that the refrigerant tank has a refrigerant deficiency, and the filling valve is controlled to be closed.
According to one embodiment of the invention, when the refrigerant tank is judged to be lack of refrigerant, prompt information for replacing the refrigerant tank is sent.
According to an embodiment of the invention, the filling valve is kept open when the temperature difference Δ Tp is greater than a preset temperature threshold or the pressure difference Δ Pc is greater than a preset pressure threshold.
According to one embodiment of the invention, the filling valve is a solenoid valve.
In order to achieve the above object, a non-transitory computer readable storage medium is provided according to a second aspect of the present invention, and a computer program is stored thereon, and when executed by a processor, the method for determining refrigerant charge of an air-conditioning heat pump system is implemented.
By executing the method for judging the refrigerant charging of the air-conditioning heat pump system, whether the refrigerant tank has the refrigerant can be intelligently judged, so that the refrigerant tank can be timely replaced when no refrigerant exists.
In order to achieve the above object, a third aspect of the present invention provides an apparatus for charging refrigerant in an air conditioning heat pump system, including: a refrigerant tank; the refrigerant filling pipe is used for connecting the refrigerant tank to a refrigerant circulating flow path of the air-conditioning heat pump system; the filling valve is arranged on the refrigerant filling pipe; the temperature detection module is used for detecting the exhaust temperature Tp0 of the air-conditioning heat pump system before the refrigerant is filled, and detecting the exhaust temperature Tp of the air-conditioning heat pump system in real time in the refrigerant filling process; the pressure detection module is used for detecting the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling and detecting the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process; the control module is used for obtaining a temperature difference delta Tp between an exhaust temperature Tp and an exhaust temperature Tp0, obtaining a pressure difference delta Pc between an exhaust pressure Pc and an exhaust pressure Pc0, and judging whether the refrigerant tank has refrigerant loss or not according to the temperature difference delta Tp and the pressure difference delta Pc.
According to the device for filling the refrigerant into the air-conditioning heat pump system, the exhaust temperature Tp0 of the air-conditioning heat pump system before the refrigerant is filled is detected through the temperature detection module, the exhaust temperature Tp of the air-conditioning heat pump system is detected in real time in the refrigerant filling process, the exhaust pressure Pc0 of the air-conditioning heat pump system before the refrigerant is filled is detected through the pressure detection module, the exhaust pressure Pc of the air-conditioning heat pump system is detected in real time in the refrigerant filling process, then the temperature difference delta Tp between the exhaust temperature Tp and the exhaust temperature Tp0 is obtained through the control module, the pressure difference delta Pc between the exhaust pressure Pc and the exhaust pressure Pc0 is obtained, and whether the refrigerant tank is deficient or not is judged according to the temperature difference delta Tp. The device can judge whether there is the refrigerant in the refrigerant jar intelligently to when no refrigerant, change in time the refrigerant jar.
In addition, the device for filling the refrigerant into the air-conditioning heat pump system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, when the temperature difference Δ Tp is less than or equal to a preset temperature threshold and the pressure difference Δ Pc is less than or equal to a preset pressure threshold, the control module determines that the refrigerant tank has a refrigerant deficiency and controls the filling valve to close.
According to an embodiment of the present invention, the device for filling refrigerant into the air-conditioning heat pump system further includes a prompt module, wherein the control module further controls the prompt module to send out a prompt message for replacing the refrigerant tank when the control module determines that the refrigerant tank has a refrigerant shortage.
According to an embodiment of the invention, the control module is further configured to keep the filling valve open when the temperature difference Δ Tp is greater than a preset temperature threshold or the pressure difference Δ Pc is greater than a preset pressure threshold.
According to one embodiment of the invention, the filling valve is a solenoid valve.
Drawings
Fig. 1 is a flowchart of a method for determining refrigerant charge of an air-conditioning heat pump system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for determining refrigerant charge of an air-conditioning heat pump system according to an embodiment of the present invention;
fig. 3 is a block diagram illustrating an apparatus for charging an air conditioning heat pump system with refrigerant according to an embodiment of the present invention; and
fig. 4 is a block diagram illustrating an apparatus for charging a refrigerant in an air conditioning heat pump system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a determination method for refrigerant charging of an air-conditioning heat pump system, a non-transitory computer-readable storage medium, and an apparatus for refrigerant charging of an air-conditioning heat pump system according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for determining refrigerant charge of an air-conditioning heat pump system according to an embodiment of the present invention.
In an embodiment of the present invention, the apparatus for filling refrigerant into the air-conditioning heat pump system may include a refrigerant tank, a refrigerant filling pipe connecting the refrigerant tank to a refrigerant circulation flow path of the air-conditioning heat pump system, and a filling valve disposed on the refrigerant filling pipe. Wherein the filling valve may be a solenoid valve.
As shown in fig. 1, a method for determining refrigerant charging of an air-conditioning heat pump system according to an embodiment of the present invention may include the following steps:
s1, detecting the exhaust temperature Tp0 and the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling, and detecting the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process.
In the refrigerant filling process, because the exhaust temperature and the exhaust pressure of the air-conditioning heat pump system can be changed before filling, when the refrigerant in the refrigerant tank is too little or has no refrigerant, the refrigerant cannot be filled into the system, and the exhaust temperature and the exhaust pressure of the system can be changed at the moment, so that the refrigerant filling process can be judged by the change difference value of the exhaust temperature and the exhaust pressure of the system, whether the refrigerant in the refrigerant tank is few or no refrigerant, and when the refrigerant is few or no refrigerant, a user is reminded, and the refrigerant tank is replaced in time.
Specifically, when the air-conditioning heat pump system needs to be filled with the refrigerant, the refrigerant tank is connected with the refrigerant filling pipe orifice, so that the refrigerant in the refrigerant tank flows into a refrigerant loop of the air-conditioning heat pump system through the refrigerant filling pipe. Then, the user sends refrigerant filling signal to the air-conditioning heat pump system through remote controller etc. to make the air-conditioning heat pump system enter the refrigerant filling mode, and at this moment the air-conditioning heat pump system acquires and records the exhaust pressure and the exhaust temperature of system earlier, then controls filling valve to open again to carry out the refrigerant filling, fills the in-process at the refrigerant, detects and records the exhaust pressure and the exhaust temperature of system in real time. The discharge pressure Pc and the discharge temperature Tp may be obtained by a pressure sensor and a temperature sensor respectively provided at a discharge port of the compressor.
S2, a temperature difference Δ Tp between the exhaust temperature Tp and the exhaust temperature Tp0 is acquired, and a pressure difference Δ Pc between the exhaust pressure Pc and the exhaust pressure Pc0 is acquired. The temperature difference Δ Tp is Tp-Tp0, and the pressure difference Δ Pc is Pc-Pc 0.
And S3, judging whether the refrigerant tank has refrigerant loss according to the temperature difference delta Tp and the pressure difference delta Pc.
According to an embodiment of the invention, the fill valve is kept open when the temperature difference Δ Tp is greater than a preset temperature threshold or the pressure difference Δ Pc is greater than a preset pressure threshold. The preset temperature threshold value Δ T and the preset pressure threshold value Δ P may be obtained through a number of experimental tests.
According to an embodiment of the invention, when the temperature difference Δ Tp is less than or equal to the preset temperature threshold and the pressure difference Δ Pc is less than or equal to the preset pressure threshold, it is determined that refrigerant is missing from the refrigerant tank, and the filling valve is controlled to be closed.
Specifically, in the refrigerant filling process, the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system are detected in real time, the temperature difference Δ Tp between the exhaust temperature Tp and the exhaust temperature Tp0 before filling is calculated, the pressure difference Δ Pc between the exhaust pressure Pc and the exhaust pressure Pc0 before filling is calculated, and the temperature difference Δ Tp and the pressure difference Δ Pc are judged. If delta Tp is larger than delta T or delta Pc is larger than delta P, the refrigerant quantity in the refrigerant tank is large, and the filling valve is kept in an open state until the refrigerant filling is finished; if Δ Tp ≦ Δ T and Δ Pc ≦ Δ P, it indicates that refrigerant is missing from the refrigerant tank (e.g., no refrigerant or little refrigerant in the refrigerant tank) and controls the fill valve to close. Therefore, in the refrigerant charging process, whether refrigerant is lost in the refrigerant tank can be intelligently judged by using the variation difference value of the exhaust pressure and the exhaust temperature.
Further, according to an embodiment of the present invention, when it is determined that the refrigerant tank has a refrigerant loss, a prompt message for replacing the refrigerant tank is sent, for example, a nixie tube display symbol E on a control panel of the air-conditioning heat pump system or a corresponding LED lamp flashes to remind a user to replace the refrigerant tank.
Fig. 2 is a flowchart illustrating a method for determining refrigerant charge of an air-conditioning heat pump system according to an embodiment of the present invention, and as shown in fig. 2, the method for determining refrigerant charge of an air-conditioning heat pump system may include the following steps:
s101, detecting the exhaust temperature Tp0 and the exhaust pressure Pc0 before the refrigerant is filled, and detecting the exhaust temperature Tp and the exhaust pressure Pc in the refrigerant filling process in real time.
S102, judging whether Tp-Tp0 is less than or equal to △ T, if so, executing step S103, and if not, executing step S104.
S103, judging whether Pc-Pc0 is less than or equal to △ P, if so, executing step S105, and if not, executing step S104.
And S104, keeping the filling valve in an open state to continue refrigerant filling until the filling is finished.
And S105, judging that the refrigerant tank has refrigerant loss, controlling the filling valve to be closed, and sending prompt information for prompting the replacement of the refrigerant tank.
In summary, according to the method for determining refrigerant filling of the air-conditioning heat pump system in the embodiment of the invention, the discharge temperature Tp0 and the discharge pressure Pc0 of the air-conditioning heat pump system before refrigerant filling are detected, the discharge temperature Tp and the discharge pressure Pc of the air-conditioning heat pump system are detected in real time during the refrigerant filling process, then the temperature difference Δ Tp between the discharge temperature Tp and the discharge temperature Tp0 is obtained, the pressure difference Δ Pc between the discharge pressure Pc and the discharge pressure Pc0 is obtained, and finally whether refrigerant is missing in the refrigerant tank is determined according to the temperature difference Δ Tp and the pressure difference Δ Pc. The method can intelligently judge whether the refrigerant tank has the refrigerant or not so as to replace the refrigerant tank in time when no refrigerant exists.
In addition, the invention also provides a non-transitory computer readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method for judging when the refrigerant is filled into the air-conditioning heat pump system is implemented.
By executing the method for judging the refrigerant charging of the air-conditioning heat pump system, the non-transitory computer readable storage medium provided by the embodiment of the invention can intelligently judge whether the refrigerant tank has the refrigerant, so that the refrigerant tank can be replaced in time when no refrigerant exists.
Fig. 3 is a block diagram illustrating an apparatus for charging a refrigerant in an air conditioning heat pump system according to an embodiment of the present invention. As shown in fig. 3, an apparatus for charging refrigerant in an air conditioning heat pump system according to an embodiment of the present invention may include: a refrigerant tank (not shown), a refrigerant filling pipe (not shown), a filling valve (not shown), a temperature detection module 10, a pressure detection module 20, and a control module 30.
The refrigerant filling pipe is used for connecting the refrigerant tank to a refrigerant circulating flow path of the air-conditioning heat pump system, and the filling valve is arranged on the refrigerant filling pipe. The temperature detection module 10 is used for detecting the exhaust temperature Tp0 of the air-conditioning heat pump system before the refrigerant is filled, and detecting the exhaust temperature Tp of the air-conditioning heat pump system in real time in the refrigerant filling process. The pressure detection module 20 is configured to detect an exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling, and detect the exhaust pressure Pc of the air-conditioning heat pump system in real time during the refrigerant filling process. The control module 30 is configured to obtain a temperature difference Δ Tp between the discharge temperature Tp and the discharge temperature Tp0, obtain a pressure difference Δ Pc between the discharge pressure Pc and the discharge pressure Pc0, and determine whether refrigerant tank is missing according to the temperature difference Δ Tp and the pressure difference Δ Pc.
According to an embodiment of the present invention, when the temperature difference Δ Tp is less than or equal to the preset temperature threshold and the pressure difference Δ Pc is less than or equal to the preset pressure threshold, the control module 30 determines that the refrigerant tank has a refrigerant deficiency and controls the filling valve to close.
According to an embodiment of the present invention, as shown in fig. 4, the apparatus for charging refrigerant in an air conditioning heat pump system may further include a prompt module 40. When the control module 30 determines that the refrigerant tank has a refrigerant loss, the prompt module 40 is further controlled to send out prompt information for replacing the refrigerant tank.
According to one embodiment of the present invention, control module 30 is further configured to maintain the fill valve open when the temperature difference Δ Tp is greater than a preset temperature threshold or the pressure difference Δ Pc is greater than a preset pressure threshold.
According to one embodiment of the invention, the filling valve may be a solenoid valve.
It should be noted that details that are not disclosed in the apparatus for charging refrigerant in an air-conditioning heat pump system according to the embodiment of the present invention refer to details that are disclosed in the method for determining refrigerant charging in an air-conditioning heat pump system according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the device for filling the refrigerant into the air-conditioning heat pump system, the refrigerant tank is connected to the refrigerant circulating flow path of the air-conditioning heat pump system through the refrigerant filling pipe; and a filling valve is arranged on the refrigerant filling pipe. The method comprises the steps of detecting the exhaust temperature Tp0 of the air-conditioning heat pump system before refrigerant filling through a temperature detection module, detecting the exhaust temperature Tp of the air-conditioning heat pump system in real time in the refrigerant filling process, detecting the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling through a pressure detection module, detecting the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process, then obtaining the temperature difference delta Tp between the exhaust temperature Tp and the exhaust temperature Tp0 through a control module, obtaining the pressure difference delta Pc between the exhaust pressure Pc and the exhaust pressure Pc0, and judging whether refrigerant loss occurs in a refrigerant tank or not according to the temperature difference delta Tp and the pressure. The device can judge whether there is the refrigerant in the refrigerant jar intelligently to when no refrigerant, change in time the refrigerant jar.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A method for judging the refrigerant charging of an air-conditioning heat pump system is characterized in that a device for charging the refrigerant of the air-conditioning heat pump system comprises a refrigerant tank, a refrigerant charging pipe for connecting the refrigerant tank to a refrigerant circulating flow path of the air-conditioning heat pump system, and a charging valve arranged on the refrigerant charging pipe, and the method comprises the following steps:
detecting the exhaust temperature Tp0 and the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling, and detecting the exhaust temperature Tp and the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process;
acquiring a temperature difference delta Tp between an exhaust temperature Tp and an exhaust temperature Tp0, and acquiring a pressure difference delta Pc between exhaust pressure Pc and exhaust pressure Pc 0;
and judging whether the refrigerant tank has refrigerant loss or not according to the temperature difference delta Tp and the pressure difference delta Pc.
2. The method as claimed in claim 1, wherein when the temperature difference Δ Tp is less than or equal to a predetermined temperature threshold and the pressure difference Δ Pc is less than or equal to a predetermined pressure threshold, it is determined that refrigerant is missing from the refrigerant tank, and the filling valve is controlled to be closed.
3. The method as claimed in claim 2, wherein when the refrigerant tank is determined to be missing, a prompt for replacing the refrigerant tank is sent.
4. A method for determining refrigerant charge of an air conditioning heat pump system as claimed in any one of claims 1 to 3, wherein the charge valve is kept open when the temperature difference Δ Tp is greater than a preset temperature threshold or the pressure difference Δ Pc is greater than a preset pressure threshold.
5. A method for determining refrigerant charge of an air conditioning heat pump system as claimed in any one of claims 1 to 3, wherein said charge valve is a solenoid valve.
6. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the program when executed by a processor implements the method for determining refrigerant charge of an air conditioning heat pump system according to any one of claims 1 to 5.
7. The utility model provides a device that refrigerant filled is carried out air conditioner heat pump system which characterized in that includes:
a refrigerant tank;
the refrigerant filling pipe is used for connecting the refrigerant tank to a refrigerant circulating flow path of the air-conditioning heat pump system;
the filling valve is arranged on the refrigerant filling pipe;
the temperature detection module is used for detecting the exhaust temperature Tp0 of the air-conditioning heat pump system before the refrigerant is filled, and detecting the exhaust temperature Tp of the air-conditioning heat pump system in real time in the refrigerant filling process;
the pressure detection module is used for detecting the exhaust pressure Pc0 of the air-conditioning heat pump system before refrigerant filling and detecting the exhaust pressure Pc of the air-conditioning heat pump system in real time in the refrigerant filling process;
the control module is used for obtaining a temperature difference delta Tp between an exhaust temperature Tp and an exhaust temperature Tp0, obtaining a pressure difference delta Pc between an exhaust pressure Pc and an exhaust pressure Pc0, and judging whether the refrigerant tank has refrigerant loss or not according to the temperature difference delta Tp and the pressure difference delta Pc.
8. The apparatus as claimed in claim 7, wherein when the temperature difference Δ Tp is less than or equal to a predetermined temperature threshold and the pressure difference Δ Pc is less than or equal to a predetermined pressure threshold, the control module determines that refrigerant is missing from the refrigerant tank and controls the filling valve to close.
9. The apparatus for refrigerant charging of an air conditioning heat pump system as claimed in claim 8, further comprising a prompt module, wherein the control module further controls the prompt module to send out a prompt message for replacing the refrigerant tank when the control module determines that the refrigerant tank is missing.
10. The apparatus as set forth in claim 8, wherein the control module is further configured to maintain the fill valve open when the temperature difference atp is greater than a predetermined temperature threshold or the pressure difference apc is greater than a predetermined pressure threshold.
11. The apparatus for refrigerant charging of an air conditioning heat pump system as recited in any of claims 7-10, wherein said charging valve is a solenoid valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022109603A1 (en) * | 2020-11-19 | 2022-05-27 | Pacific Link, L.L.C. | Autofill overfill protection temperature sensing air conditioning coolant recharge |
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| CN108895733B (en) * | 2018-09-19 | 2021-05-25 | 广东美的暖通设备有限公司 | Refrigerant filling method and device |
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| WO2022109603A1 (en) * | 2020-11-19 | 2022-05-27 | Pacific Link, L.L.C. | Autofill overfill protection temperature sensing air conditioning coolant recharge |
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| CN107763911A (en) | 2018-03-06 |
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