CN114234546A - Temperature control system of phase-change cold-hot vehicle-mounted refrigerator and control method thereof - Google Patents
Temperature control system of phase-change cold-hot vehicle-mounted refrigerator and control method thereof Download PDFInfo
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- CN114234546A CN114234546A CN202111527383.4A CN202111527383A CN114234546A CN 114234546 A CN114234546 A CN 114234546A CN 202111527383 A CN202111527383 A CN 202111527383A CN 114234546 A CN114234546 A CN 114234546A
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- change material
- heating chamber
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- 238000000034 method Methods 0.000 title claims description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 238000007710 freezing Methods 0.000 claims abstract description 36
- 230000008014 freezing Effects 0.000 claims abstract description 36
- 239000012782 phase change material Substances 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
A temp control system for the phase-change cold-hot refrigerator carried by car is composed of 3 refrigerating chambers, freezing chamber and heating chamber, refrigerating chamber evaporator, freezing chamber evaporator, heating chamber condenser, air-cooled condenser, capillary tube and two-way electromagnetic valve. The invention can ensure that the phase-change cold and hot vehicle-mounted refrigerator can normally and stably operate according to the designed function.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a temperature measurement and control logic for a phase-change cold and hot vehicle-mounted refrigerator.
Background
The temperature control system of the vehicle-mounted refrigerator is an important link in the application of intelligent household appliances or industrial production, and an application technology taking the single chip microcomputer to control the vehicle-mounted refrigerator as a main core becomes a new engineering application technology. The single chip microcomputer is widely applied in the aspects of high integration level, high operation speed, small volume, reliable operation, low price and the like. Temperature control systems are relatively common and typical process systems, and temperature is one of the important controlled parameters in a process of the manufacturing industry. The temperature control of the phase-change cold and hot vehicle-mounted refrigerator has a special temperature adjusting threshold value, and a specific temperature control system is required to make corresponding functional configuration so as to achieve the purpose of the phase-change cold and hot vehicle-mounted refrigerator. Therefore, the temperature control logic is a key technology for good operation of the phase change type vehicle-mounted refrigerator and has a good development prospect.
At present, a temperature control system capable of aiming at the operation of a phase-change cold and hot vehicle-mounted refrigerator is not available.
Disclosure of Invention
The invention relates to the technical field of temperature control, and aims to a temperature control system of a phase-change cold-hot vehicle-mounted refrigerator and a control method thereof.
The phase-change cold and hot vehicle-mounted refrigerator is a vapor compression type refrigeration refrigerator, adopts a heat preservation mode of combining phase-change energy storage, and is mainly structurally provided with 3 chambers including a refrigerating chamber, a freezing chamber and a heating chamber, and other structures include a refrigerating chamber evaporator, a freezing chamber evaporator, a heating chamber condenser, an air-cooled condenser, a capillary tube, a two-way electromagnetic valve and the like. Wherein the phase change material is filled in the aluminum plates of the three chambers. The operation principle is that the refrigerant flows through a compressor, an electromagnetic valve, a heating chamber condenser, a drying filter, an electromagnetic valve, a capillary tube, a refrigerating chamber evaporator or a freezing chamber evaporator and a gas-liquid separator in sequence, and finally returns to the compressor for recycling; the refrigerating chamber evaporator exchanges heat with the refrigerating chamber phase change material, the refrigerating chamber phase change material is cooled and solidified, and the temperature of the refrigerating chamber is reduced; the freezing chamber evaporator exchanges heat with the freezing chamber phase change material, the phase change material is cooled and solidified, and the temperature of the freezing chamber is reduced; the condenser of the heating chamber exchanges heat with the phase change material of the heating chamber, the phase change material of the heating chamber is heated and melted, and the temperature of the heating chamber rises.
The electric control main hardware of the invention comprises: 1 STC89C516 singlechip; 4 DS18B20 digital temperature sensor modules; 1 LCD1602 display screen; 4 independent key modules are provided; 1 buzzer; and 7 relay control modules. Wherein, the temperature sensors are respectively arranged on the aluminum plate box body of the refrigerating chamber and used for measuring the temperature of the refrigerating chamber; measuring the temperature of the freezing chamber on an aluminum plate box body of the freezing chamber; measuring the temperature of the heating chamber on an aluminum plate box body of the heating chamber; and on the singlechip control board, the working environment temperature of control hardware such as a singlechip and the like is measured.
The invention provides a temperature control system, which has six operation modes: firstly, in an independent refrigeration operation mode, the temperature of a refrigerating chamber is regulated and controlled according to the deviation between the target temperature required by the phase change material and the real-time target temperature, so that the target temperature required by the phase change material of the refrigerating chamber is consistent with the real-time target temperature; secondly, in an independent freezing operation mode, the temperature of the refrigerating chamber is regulated and controlled according to the deviation between the target temperature required by the phase-change material and the real-time target temperature, so that the target temperature required by the phase-change material of the refrigerating chamber is consistent with the real-time target temperature; thirdly, an independent heating operation mode is adopted, and the temperature of the heating chamber is regulated and controlled according to the deviation between the target temperature required by the phase change material and the real-time target temperature, so that the target temperature required by the phase change material in the heating chamber is consistent with the real-time target temperature; regulating and controlling the temperature of the refrigerating chamber according to the target temperature required by the phase change material and the deviation of the real-time target temperature so that the target temperature required by the phase change material of the refrigerating chamber and the heating chamber is consistent with the real-time target temperature; regulating and controlling the temperature of the refrigerating chamber according to the deviation of the target temperature required by the phase-change material and the real-time target temperature so that the target temperature required by the phase-change material of the refrigerating chamber and the heating chamber is consistent with the real-time target temperature; sixthly, a default refrigerating + heating and freezing + heating circulating operation mode and a freezing + heating mixed operation mode are adopted, and the temperature of the refrigerating chamber is regulated and controlled according to the deviation between the target temperature required by the phase change material and the real-time target temperature, so that the target temperatures required by the phase change materials of the refrigerating chamber, the freezing chamber and the heating chamber are consistent with the real-time target temperature; and 2 protection modes in the operation process: the method comprises the following steps of (1) carrying out an over-high alarm mode on the working environment of the CPU and a 300s time length protection mode after the compressor is closed so as to protect the control element and the compressor from normal operation; and a standby mode, in which the system is only powered on for standby and does nothing.
When the invention is applied, the phase change cold and hot vehicle-mounted refrigerator can be ensured to normally and stably operate according to the designed function.
Drawings
Fig. 1 is a working principle diagram of the present invention.
Fig. 2 is a circuit diagram of control hardware according to an embodiment of the present invention.
In the figure, 1. a cold storage for a refrigerating chamber; 2. a cold room phase change material; 3. a refrigerating chamber evaporator; 4. a freezing chamber evaporator; 5. a cold accumulator for the freezing chamber; 6. drying the filter; 7. a regenerator of the heating chamber; 8. heating chamber phase change material; 9. a condenser in the heating chamber; 10. an air-cooled condenser; 11. a first solenoid valve; 12. drying the filter; 13. a second solenoid valve; 14. a third electromagnetic valve; 15. a first capillary tube; 16. a fourth solenoid valve; 17. a compressor; 18. a gas-liquid separator; 19. a fifth solenoid valve; 20. a sixth electromagnetic valve; 21. a second capillary tube; 22. a third capillary tube; 23. a freezing chamber phase change material; 24. a display screen; 25.51 single-chip microcomputer; 26. a singlechip working temperature sensor; 27. a heating chamber temperature sensor; 28. a refrigerating chamber temperature sensor; 29. a freezer temperature sensor; 30. an electromagnetic valve; 31. a compressor; an ESC key; an OK key; 34. a key is added; 35. a key is down; 36. a buzzer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Description of the drawings: the temperature of the refrigerating chamber is T1; the heating chamber temperature is T2; the freezer temperature was T3.
The power supply is switched on, after the system is started, the default circulation mode is automatically started, the mode name and the corresponding temperature value in the current mode are displayed, and the refrigeration and heating mode in the default circulation mode is preferentially entered: if the current T1> =0.5 ℃ and T2< =49.5 ℃, the compressor is started, the solenoid valve I and the solenoid valve V are opened, and other solenoid valves are kept in a closed state; if the current T1> =0.5 ℃ and T2> =50.5 ℃, the compressor is started, the electromagnetic valve II and the electromagnetic valve V are opened, and other electromagnetic valves are kept in a closed state; if the current T1< = -0.5 ℃ and T3> = -19.5 ℃, automatically entering a freezing + heating mode in a default circulation mode: if the current T3> = -19.5 ℃ and T2< =49.5 ℃, the compressor is started, the solenoid valve I and the solenoid valve VI are opened, and other solenoid valves are kept in a closed state; if the current T3> = -19.5 ℃ and the current T2> =50.5 ℃, the compressor is started, the electromagnetic valve II and the electromagnetic valve VI are opened, and other electromagnetic valves are kept in a closed state; if the current T3< = -20.5 ℃ and T1> =0.5 ℃, automatically entering a refrigerating and heating mode in a default circulation mode; if the current T1< = -0.5 ℃ and T3< = -20.5 ℃, all relays are closed, all peripheral equipment are closed, the cycle is completed, whether the compressor is changed from the on state to the off state is judged, if the compressor is changed from the on state to the off state, the compressor enters a 300s time length protection mode after being closed, the compressor automatically returns to the default circulation mode after 300s, and otherwise, the compressor directly returns to the default circulation mode.
And if the manual switching or the selection of entering other modes by the user is detected, entering the corresponding mode. The system can be manually switched at any time among an independent refrigeration running mode, an independent freezing running mode, an independent heating running mode, a refrigeration and heating mixed running mode, a freezing and heating mixed running mode, a default refrigeration and heating and freezing and heating circulation running mode and a standby mode.
In the independent refrigeration operation mode, displaying the current temperature of the refrigeration chamber, if T1> =0.5 ℃, starting the compressor, opening the electromagnetic valve II and the electromagnetic valve V, and keeping other electromagnetic valves in a closed state; if T1< = -0.5 ℃, all relays are closed, all peripheral equipment are closed, whether the compressor is changed from an open state to a closed state or not is judged, if the compressor is changed from the open state to the closed state, a 300s time length protection mode is started after the compressor is closed, the compressor automatically returns to the independent refrigeration operation mode after 300s, and otherwise, the compressor directly returns to the independent refrigeration mode.
In the independent freezing operation mode, displaying the current freezing chamber temperature, if T1> = -19.5 ℃, starting the compressor, opening the electromagnetic valve II and the electromagnetic valve VI, and keeping the other electromagnetic valves in a closed state; if T3< = -20.5 ℃, all relays are closed, all peripheral equipment are closed, whether the compressor is changed from an open state to a closed state or not is judged, if the compressor is changed from the open state to the closed state, a 300s time length protection mode is started after the compressor is closed, the compressor automatically returns to the independent freezing operation mode after 300s, and otherwise, the compressor directly returns to the independent freezing mode.
In an independent heating operation mode, displaying the current heating chamber temperature, if T2< =49.5 ℃, starting the compressor, opening the electromagnetic valve I, the electromagnetic valve III and the electromagnetic valve IV, and keeping other electromagnetic valves in a closed state; if T2> =50.5 ℃, all relays are closed, then all peripherals are closed, whether the compressor is changed from an open state to a closed state or not is judged, if the compressor is changed from the open state to the closed state, a 300s time length protection mode is entered after the compressor is closed, the single heating operation mode is automatically returned after 300s, and if not, the single heating mode is directly returned.
In a refrigerating and heating mixed operation mode, displaying a current refrigerating chamber and T2, if T1> =0.5 ℃ and T2< =49.5 ℃, starting the compressor, opening the electromagnetic valve I and the electromagnetic valve V, and keeping the other electromagnetic valves in a closed state; if T1> =0.5 ℃ and T2> =50.5 ℃, the compressor is started, the electromagnetic valve II and the electromagnetic valve V are opened, and other electromagnetic valves are kept in a closed state; if T1< = -0.5 ℃ and T2< =49.5 ℃, the compressor is started, the electromagnetic valve I and the electromagnetic valve III are opened, the electromagnetic valve IV is opened, and other electromagnetic valves are kept in a closed state; if T1< = -0.5 ℃ and T2> =50.5 ℃, all relays are closed, all peripheral equipment are closed, whether the compressor is changed from the on state to the off state is judged, if the compressor is changed from the on state to the off state, a 300s time length protection mode is started after the compressor is closed, the refrigeration and heating mixed operation mode is automatically returned after 300s, and otherwise, the refrigeration and heating mixed operation mode is directly returned.
In a freezing and heating mixed operation mode, displaying the temperature of a current freezing chamber and a current heating chamber, if T3> = -19.5 ℃ and T2< =49.5 ℃, starting a compressor, opening an electromagnetic valve I and an electromagnetic valve VI, and keeping other electromagnetic valves in a closed state; if T3> = -19.5 ℃ and T2> =50.5 ℃, the compressor is started, the electromagnetic valve II and the electromagnetic valve VI are opened, and other electromagnetic valves are kept in a closed state; if T3< = -20.5 ℃ and T2< =49.5 ℃, the compressor is started, the electromagnetic valve I and the electromagnetic valve III are opened, the electromagnetic valve IV is opened, and other electromagnetic valves are kept in a closed state; if T3< = -20.5 ℃ and T2> =50.5 ℃, all relays are closed, all peripheral devices are closed, whether the compressor is changed from an open state to a closed state or not is judged, if the compressor is changed from the open state to the closed state, a 300s time length protection mode is started after the compressor is closed, the freezing and heating mixed operation mode is automatically returned after 300s, and otherwise, the freezing and heating mixed operation mode is directly returned.
And in the standby mode, all the relays are closed, all the peripheral equipment is closed, whether the compressor is changed from the open state to the closed state is judged, if the compressor is changed from the open state to the closed state, the compressor enters a 300s time length protection mode after being closed, the compressor automatically returns to the standby mode after 300s, and otherwise, the compressor directly returns to the standby mode again.
If the CPU working environment overhigh alarm mode is a passive triggering mode, if the CPU working environment temperature > =75 ℃, all relays are forcibly closed, a buzzer alarms, the current working environment temperature is displayed, whether the compressor is changed from an open state to a closed state or not is judged, if the compressor is changed from the open state to the closed state, a 300s time length protection mode after the compressor is closed is entered, if the working environment temperature > =75 ℃ after 300s, the alarm is continuously given, and if the working environment temperature > =75 ℃ after 300s, the standby mode is returned.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A temperature control system of a phase-change cold-hot vehicle-mounted refrigerator is characterized by comprising 3 chambers including a refrigerating chamber, a freezing chamber and a heating chamber, a refrigerating chamber evaporator, a freezing chamber evaporator, a heating chamber condenser, an air-cooled condenser, a capillary tube and a two-way electromagnetic valve, wherein a phase-change material is filled in an aluminum plate of the three chambers.
2. The temperature control system of a phase-change cold-hot vehicle-mounted refrigerator as claimed in claim 1, wherein the refrigerating chamber evaporator exchanges heat with the refrigerating chamber phase-change material, the refrigerating chamber phase-change material is cooled and solidified, and the temperature of the refrigerating chamber is lowered; the freezing chamber evaporator exchanges heat with the freezing chamber phase change material, the phase change material is cooled and solidified, and the temperature of the freezing chamber is reduced; the condenser of the heating chamber exchanges heat with the phase change material of the heating chamber, the phase change material of the heating chamber is heated and melted, and the temperature of the heating chamber rises.
3. A control method of a temperature control system of a phase-change cold-hot vehicle-mounted refrigerator is characterized in that main electric control hardware comprises the following steps: 1 STC89C516 singlechip; 4 DS18B20 digital temperature sensor modules; 1 LCD1602 display screen; 4 independent key modules are provided; 1 buzzer; 7 relay control modules, wherein the temperature sensors are respectively placed on the cold storage chamber aluminum plate box body to measure the temperature of the cold storage chamber; measuring the temperature of the freezing chamber on an aluminum plate box body of the freezing chamber; measuring the temperature of the heating chamber on an aluminum plate box body of the heating chamber; and on the singlechip control board, the working environment temperature of control hardware such as a singlechip and the like is measured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527383.4A CN114234546A (en) | 2021-12-15 | 2021-12-15 | Temperature control system of phase-change cold-hot vehicle-mounted refrigerator and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527383.4A CN114234546A (en) | 2021-12-15 | 2021-12-15 | Temperature control system of phase-change cold-hot vehicle-mounted refrigerator and control method thereof |
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| Publication Number | Publication Date |
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| CN114234546A true CN114234546A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111527383.4A Pending CN114234546A (en) | 2021-12-15 | 2021-12-15 | Temperature control system of phase-change cold-hot vehicle-mounted refrigerator and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014041A (en) * | 2022-05-19 | 2022-09-06 | 青岛海尔空调器有限总公司 | Heating system, heating method and refrigeration equipment |
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|---|---|---|---|---|
| JP2004324902A (en) * | 2003-04-21 | 2004-11-18 | Matsushita Electric Ind Co Ltd | Freezing refrigerator |
| CN103162487A (en) * | 2013-04-15 | 2013-06-19 | 上海第二工业大学 | Small vehicle-mounted refrigerator based on semiconductor chilling plates |
| CN205655598U (en) * | 2016-05-17 | 2016-10-19 | 浙江云格电器股份有限公司 | On -vehicle refrigerator with function heats |
| CN107367125A (en) * | 2017-06-12 | 2017-11-21 | 青岛海尔股份有限公司 | Refrigerator and controlling method for refrigerator |
| CN109798711A (en) * | 2017-11-16 | 2019-05-24 | 富泰华工业（深圳）有限公司 | Refrigerator with heating room |
| CN110864494A (en) * | 2019-11-20 | 2020-03-06 | 合肥美菱物联科技有限公司 | Variable frequency compressor control method and device and refrigerator |
-
2021
- 2021-12-15 CN CN202111527383.4A patent/CN114234546A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004324902A (en) * | 2003-04-21 | 2004-11-18 | Matsushita Electric Ind Co Ltd | Freezing refrigerator |
| CN103162487A (en) * | 2013-04-15 | 2013-06-19 | 上海第二工业大学 | Small vehicle-mounted refrigerator based on semiconductor chilling plates |
| CN205655598U (en) * | 2016-05-17 | 2016-10-19 | 浙江云格电器股份有限公司 | On -vehicle refrigerator with function heats |
| CN107367125A (en) * | 2017-06-12 | 2017-11-21 | 青岛海尔股份有限公司 | Refrigerator and controlling method for refrigerator |
| CN109798711A (en) * | 2017-11-16 | 2019-05-24 | 富泰华工业（深圳）有限公司 | Refrigerator with heating room |
| CN110864494A (en) * | 2019-11-20 | 2020-03-06 | 合肥美菱物联科技有限公司 | Variable frequency compressor control method and device and refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014041A (en) * | 2022-05-19 | 2022-09-06 | 青岛海尔空调器有限总公司 | Heating system, heating method and refrigeration equipment |
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