CN220669813U - Heating power expansion valve refrigerating system capable of being started under pressure - Google Patents
Heating power expansion valve refrigerating system capable of being started under pressure Download PDFInfo
- Publication number
- CN220669813U CN220669813U CN202321597705.7U CN202321597705U CN220669813U CN 220669813 U CN220669813 U CN 220669813U CN 202321597705 U CN202321597705 U CN 202321597705U CN 220669813 U CN220669813 U CN 220669813U
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- Prior art keywords
- pressure
- control module
- main control
- compressor
- expansion valve
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 13
- 238000005057 refrigeration Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The utility model provides a heating power expansion valve refrigerating system capable of being started under pressure, which comprises a compressor, a condenser, a heating power expansion valve, an evaporator, a bypass electromagnetic valve, a first pressure sensor, a second pressure sensor and a main control module, wherein the first pressure sensor is connected with the main control module; one end of the bypass electromagnetic valve is connected with an air inlet pipeline of the compressor, and the other end of the bypass electromagnetic valve is connected with an exhaust pipeline of the compressor; the first pressure sensor is arranged in an air inlet pipe of the compressor, and the second pressure sensor is arranged in an exhaust pipe of the compressor; the main control module is used for controlling the bypass electromagnetic valve to be opened when the received exhaust pressure is larger than a preset starting pressure before the compressor is started; after the bypass electromagnetic valve is opened, when the air inlet pressure and the air outlet pressure received by the main control module are balanced, the main control module is also used for controlling the bypass electromagnetic valve to be closed and controlling the compressor to be started.
Description
Technical Field
The utility model relates to the technical field of refrigeration equipment, in particular to a heating power expansion valve refrigeration system capable of being started under pressure.
Background
The refrigerating system throttled by the thermal expansion valve is adopted, in the normal operation process of the system, the exhaust port side of the compressor belongs to high pressure, the air suction port side of the compressor belongs to low pressure, when the system receives a shutdown instruction, the compressor stops operating, because of the structural characteristics of the thermal expansion valve and the compressor, the thermal expansion valve and the compressor are in a cut-off state, so that high-pressure refrigerant is stored between the exhaust port of the compressor and the thermal expansion valve, low-pressure refrigerant is stored between the thermal expansion valve and the air suction port of the compressor, a larger pressure difference exists between the air suction port and the air suction port of the compressor, and when the system receives a startup instruction, the probability of poor starting of the compressor is increased;
in order to solve the above problems, in the prior art, a certain solution is provided, for example, the application number is: 202120135144.3 discloses an air conditioning system started under pressure, which realizes the aim of starting the refrigerating system under pressure by arranging a bypass loop with an electromagnetic valve, in the scheme, after the air conditioning is stopped, the bypass electromagnetic valve is controlled to be opened, so that an air inlet pipe and an air outlet pipe of a compressor are communicated through the bypass loop, and the aim of reducing pressure is realized until the next air conditioning is started;
however, this scheme still has certain not enough, in above-mentioned scheme, to the unit that low pressure control was started and is stopped, after reaching the settlement temperature, the main solenoid valve of liquid pipe is closed, and the compressor continues to operate to low pressure protection and shut down, and its bypass circuit can open always after refrigerating system closes to lead to low pressure to rise, the compressor appears frequently to start and stop, leads to the compressor to damage easily.
Disclosure of Invention
In order to solve the problems, the utility model provides a heating power expansion valve refrigerating system capable of being started under pressure, which controls the opening time of a bypass electromagnetic valve in a pressure detection mode, and solves the problem that a compressor is started and stopped frequently while the starting under pressure is realized.
The utility model provides a heating power expansion valve refrigerating system capable of being started under pressure, which comprises a compressor 100, a condenser 200, a heating power expansion valve 300, an evaporator 400, a bypass electromagnetic valve 500, a first pressure sensor 600, a second pressure sensor 700, a protection electromagnetic valve 800 and a main control module;
wherein, the exhaust end of the compressor 100 is connected with the air inlet end of the condenser 200 through an exhaust pipe; the liquid outlet end of the condenser 200 is connected with one end of a protection electromagnetic valve 800 through a high-pressure liquid pipe, and the other end of the protection electromagnetic valve 800 is connected with the inlet end of the thermal expansion valve 300; the outlet end of the thermal expansion valve 300 is connected with the liquid inlet end of the evaporator 400 through a low-pressure liquid pipe; the air outlet end of the evaporator 400 is connected with the air inlet end of the compressor 100 through an air inlet pipe; the temperature sensing bulb 310 of the thermal expansion valve 300 is arranged on the air inlet pipe, and the pressure balance end of the thermal expansion valve 300 is connected with the air outlet end of the evaporator 400 through a pressure balance pipe; one end of the bypass electromagnetic valve 500 is connected with an air inlet pipeline of the compressor 100, and the other end of the bypass electromagnetic valve 500 is connected with an air outlet pipeline of the compressor 100; the first pressure sensor 600 is disposed in an intake pipe of the compressor 100, and the second pressure sensor 700 is disposed in an exhaust pipe of the compressor 100;
the control end of the bypass electromagnetic valve 500 is connected with the main control module, the output end of the first pressure sensor 600 and the output end of the second pressure sensor 700 are respectively connected with the main control module, and the control end of the protection electromagnetic valve 800 is connected with the main control module;
the first pressure sensor 600 is configured to detect an intake pressure of the air inlet of the compressor 100, and send the intake pressure to the main control module;
the second pressure sensor 700 is configured to detect an exhaust pressure of an exhaust port of the compressor 100, and send the exhaust pressure to the main control module;
the main control module is configured to control the bypass solenoid valve 500 to be opened when the received exhaust pressure is greater than a preset starting pressure before the compressor 100 is started;
after the bypass solenoid valve 500 is opened, when the intake pressure and the exhaust pressure received by the main control module are balanced, the main control module is further configured to control the bypass solenoid valve 500 to be closed and control the compressor 100 to be started.
In an embodiment of the present utility model, the condenser 200 is further provided with at least one heat dissipation fan 210, and the main control module further includes a motor driving board 810;
the control end of the heat dissipation fan 210 is connected with a motor driving plate 810 of the main control module;
the main control module is further configured to control a working state of the heat dissipation fan 210.
In an embodiment of the present utility model, the heat dissipation fan 210 includes a dc motor or an ac motor.
In an embodiment of the present utility model, the evaporator 400 is further provided with a blower 410;
the control end of the blower 410 is connected with the main control module;
the main control module is further configured to control an operation state of the blower 410.
In an embodiment of the utility model, the main control module further includes a display device 820;
the main control module is further configured to control the display device 820 to display the working state of the compressor 100 and/or the condenser 200.
In an embodiment of the present utility model, the main control module further includes a contactor 830;
the control end of the compressor 100 is connected to the first end of the contactor 830, and the second end of the contactor 830 is connected to the main control module; the main control module is also used for controlling the working state of the compressor 100.
In an embodiment of the present utility model, the main control module further includes a power access terminal 840;
wherein the power access terminal 840 includes a first power access terminal and a second power access terminal;
the second end of the contactor is also connected with the first power supply access end; the second power supply access end is connected with the control end of the main control module;
the first power supply access terminal is used for providing 380V alternating current; the second power supply access terminal is used for providing 220V alternating current control signals.
In an embodiment of the present utility model, the main control module further includes a first sensor access terminal 850 and a second sensor access terminal 860;
the output end of the first pressure sensor 600 is connected with the main control module through the first sensor access end 850; the output end of the second pressure sensor 700 is connected to the main control module through the second sensor access end 860.
In an embodiment of the present utility model, the master control module further includes a common zero line access end 870 and a first output end 880;
the control end of the bypass electromagnetic valve is connected to the first output end 880 and the common neutral line access end 870, respectively.
In an embodiment of the present utility model, the pressure-started thermal expansion valve refrigeration system further includes a low-pressure protection device, and the main control module further includes a low-pressure protection access end 890;
the low voltage protection device is connected with the low voltage protection access terminal 890;
the main control module is further configured to control the low-pressure protection device to start when the intake pressure sent by the first pressure sensor 600 is lower than a preset low-pressure protection value.
The utility model has the beneficial effects that:
the heating power expansion valve refrigerating system capable of being started under pressure provided by the utility model controls the opening time of the bypass electromagnetic valve in a pressure detection mode, so that the problem of frequent start and stop of the compressor caused by long-time opening of the bypass loop is avoided while the startup under pressure is realized.
Drawings
FIG. 1 is a schematic diagram of a pressure-activatable thermostatic expansion valve refrigeration system according to an embodiment of the present utility model;
fig. 2 is a circuit diagram of a pressure activatable thermostatic expansion valve refrigeration system according to an embodiment of the present utility model.
Reference numerals illustrate: the compressor 100, the condenser 200, the heat radiation fan 210, the thermal expansion valve 300, the bulb 310, the evaporator 400, the blower 410, the bypass solenoid valve 500, the first pressure sensor 600, the second pressure sensor 700.
Detailed Description
It should be noted that, in the present utility model, the terms "first," "second," and the like 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In a first aspect, as shown in fig. 1, in an embodiment of the present utility model, a pressure-started thermal expansion valve refrigeration system is provided, which includes a compressor 100, a condenser 200, a thermal expansion valve 300, an evaporator 400, a bypass solenoid valve 500, a first pressure sensor 600, a second pressure sensor 700, a protection solenoid valve 800, and a main control module;
wherein, the exhaust end of the compressor 100 is connected with the air inlet end of the condenser 200 through an exhaust pipe; the liquid outlet end of the condenser 200 is connected with one end of a protection electromagnetic valve 800 through a high-pressure liquid pipe, and the other end of the protection electromagnetic valve 800 is connected with the inlet end of the thermal expansion valve 300; the outlet end of the thermal expansion valve 300 is connected with the liquid inlet end of the evaporator 400 through a low-pressure liquid pipe; the air outlet end of the evaporator 400 is connected with the air inlet end of the compressor 100 through an air inlet pipe; the temperature sensing bulb 310 of the thermal expansion valve 300 is arranged on the air inlet pipe, and the pressure balance end of the thermal expansion valve 300 is connected with the air outlet end of the evaporator 400 through a pressure balance pipe; one end of the bypass electromagnetic valve 500 is connected with an air inlet pipeline of the compressor 100, and the other end of the bypass electromagnetic valve 500 is connected with an air outlet pipeline of the compressor 100; the first pressure sensor 600 is disposed in an intake pipe of the compressor 100, and the second pressure sensor 700 is disposed in an exhaust pipe of the compressor 100;
the control end of the bypass electromagnetic valve 500 is connected with the main control module, the output end of the first pressure sensor 600 and the output end of the second pressure sensor 700 are respectively connected with the main control module, and the control end of the protection electromagnetic valve 800 is connected with the main control module;
the first pressure sensor 600 is configured to detect an intake pressure of the air inlet of the compressor 100, and send the intake pressure to the main control module;
the second pressure sensor 700 is configured to detect an exhaust pressure of an exhaust port of the compressor 100, and send the exhaust pressure to the main control module;
the main control module is configured to control the bypass solenoid valve 500 to be opened when the received exhaust pressure is greater than a preset starting pressure before the compressor 100 is started;
after the bypass solenoid valve 500 is opened, when the intake pressure and the exhaust pressure received by the main control module are balanced, the main control module is further configured to control the bypass solenoid valve 500 to be closed and control the compressor 100 to be started.
Specifically, the working principle of the heating power expansion valve refrigerating system capable of being started under pressure provided by the utility model is as follows:
when the compressor needs to be started, the main control module judges the high pressure in the exhaust pipe of the compressor through the pressure sensor, if the pressure in the exhaust pipe exceeds a preset value, for example, 2.6MPa, the main control module controls the bypass electromagnetic valve to be opened, so that the exhaust pipe of the compressor is communicated with the air suction pipe through the bypass loop, the aim of pressure relief is achieved, and when the high pressure of the exhaust pipe received by the main control module is balanced with the low pressure of the air suction pipe, for example, the high pressure is 2.5MPa, the main control module controls the bypass electromagnetic valve to be closed at the moment and controls the compressor to be started, and accordingly the pressurized starting of the refrigerating system is achieved.
In an embodiment of the present utility model, as shown in fig. 1 and 2, the condenser 200 is further provided with at least one heat dissipation fan 210; the main control module further comprises a motor driving board 810, a display device 820, a contactor 830, a power supply access end 840, a first sensor access end 850, a second sensor access end 860, a public zero line access end 870, a first output end 880, and a low voltage protection access end 890;
the control end of the heat dissipation fan 210 is connected with a motor driving plate 810 of the main control module;
the main control module is further configured to control a working state of the heat dissipation fan 210; the heat dissipation fan 210 includes a dc motor or an ac motor; specifically, when the main control module determines that the working pressure of the condenser 200 is too high or the exhaust temperature is too high, the heat dissipation fan 210 is controlled to be started, so that the condenser 200 can be maintained in an optimal working state;
the evaporator 400 is further provided with a blower 410; the control end of the blower 410 is connected with the main control module; the main control module is further configured to control an operation state of the blower 410; the main control module can control the start of the blower 410 according to manual control or preset control logic of a user, so as to achieve different refrigeration effects;
the power access terminal 840 includes a first power access terminal and a second power access terminal; the first power supply access terminal is used for providing 380V alternating current; the second power supply access terminal is used for providing 220V alternating current control signals;
the control end of the compressor 100 is connected to the first end of the contactor 830, and the second end of the contactor 830 is connected to the main control module; the second end of the contactor is also connected with the first power supply access end; the second power supply access end is connected with the control end of the main control module;
the output end of the first pressure sensor 600 is connected with the main control module through the first sensor access end 850; the output end of the second pressure sensor 700 is connected with the main control module through the second sensor access end 860;
the control end of the bypass electromagnetic valve is respectively connected with the first output end 880 and the public zero line access end 870;
the heating power expansion valve refrigerating system capable of being started under pressure further comprises a low-pressure protection device, and the low-pressure protection device is connected with the low-pressure protection access end 890;
the main control module is further configured to control the low-pressure protection device to start when the intake pressure sent by the first pressure sensor 600 is lower than a preset low-pressure protection value;
the main control module is also used for controlling the working state of the compressor 100;
the main control module is further configured to control the display device 820 to display the working status of the compressor 100 and/or the condenser 200, such as the current discharge pressure and suction pressure of the compressor 100.
It is apparent that the above examples are only examples for the purpose of more clearly expressing the technical solution of the present utility model, and are not limiting the embodiments of the present utility model. It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made herein without departing from the spirit and scope of the utility model. The scope of the utility model is therefore intended to be covered by the appended claims.
Claims (10)
1. The heating power expansion valve refrigerating system capable of being started under pressure is characterized by comprising a compressor (100), a condenser (200), a heating power expansion valve (300), an evaporator (400), a bypass electromagnetic valve (500), a first pressure sensor (600), a second pressure sensor (700), a protection electromagnetic valve (800) and a main control module;
wherein the exhaust end of the compressor (100) is connected with the air inlet end of the condenser (200) through an exhaust pipe; the liquid outlet end of the condenser (200) is connected with one end of a protection electromagnetic valve (800) through a high-pressure liquid pipe, and the other end of the protection electromagnetic valve (800) is connected with the inlet end of the thermal expansion valve (300); the outlet end of the thermal expansion valve (300) is connected with the liquid inlet end of the evaporator (400) through a low-pressure liquid pipe; the air outlet end of the evaporator (400) is connected with the air inlet end of the compressor (100) through an air inlet pipe; the temperature sensing bag (310) of the thermal expansion valve (300) is arranged on the air inlet pipe, and the pressure balance end of the thermal expansion valve (300) is connected with the air outlet end of the evaporator (400) through a pressure balance pipe; one end of the bypass electromagnetic valve (500) is connected with an air inlet pipeline of the compressor (100), and the other end of the bypass electromagnetic valve (500) is connected with an air outlet pipeline of the compressor (100); the first pressure sensor (600) is arranged in an air inlet pipe of the compressor (100), and the second pressure sensor (700) is arranged in an exhaust pipe of the compressor (100);
the control end of the bypass electromagnetic valve (500) is connected with the main control module, the output end of the first pressure sensor (600) and the output end of the second pressure sensor (700) are respectively connected with the main control module, and the control end of the protection electromagnetic valve (800) is connected with the main control module;
the first pressure sensor (600) is used for detecting the air inlet pressure of the air inlet of the compressor (100) and sending the air inlet pressure to the main control module;
the second pressure sensor (700) is used for detecting the exhaust pressure of the exhaust port of the compressor (100) and sending the exhaust pressure to the main control module;
the main control module is used for controlling the bypass electromagnetic valve (500) to be opened when the received exhaust pressure is greater than a preset starting pressure before the compressor (100) is started;
after the bypass electromagnetic valve (500) is opened, when the intake pressure and the exhaust pressure received by the main control module are balanced, the main control module is further used for controlling the bypass electromagnetic valve (500) to be closed and controlling the compressor (100) to be started.
2. A pressure-activatable thermal expansion valve refrigeration system as claimed in claim 1, wherein said condenser (200) is further provided with at least one heat dissipating fan (210), said main control module further comprising a motor drive board (810);
the control end of the heat radiation fan (210) is connected with a motor driving plate (810) of the main control module;
the main control module is also used for controlling the working state of the heat radiation fan (210).
3. A pressure activatable thermal expansion valve refrigeration system as set forth in claim 2, wherein said heat dissipating fan (210) comprises a dc motor or an ac motor.
4. A pressure activatable thermal expansion valve refrigeration system according to claim 1, wherein said evaporator (400) is further provided with a blower (410);
the control end of the air blower (410) is connected with the main control module;
the main control module is also used for controlling the working state of the air blower (410).
5. A pressure activatable thermal expansion valve refrigeration system as set forth in claim 1, wherein said main control module further comprises a display device (820);
the main control module is also used for controlling the display device (820) to display the working state of the compressor (100) and/or the condenser (200).
6. A pressure activatable thermal expansion valve refrigeration system as set forth in claim 1, wherein said main control module further comprises a contactor (830);
the control end of the compressor (100) is connected with the first end of the contactor (830), and the second end of the contactor (830) is connected with the main control module; the main control module is also used for controlling the working state of the compressor (100).
7. A pressure activatable thermal expansion valve refrigeration system as set forth in claim 6, wherein said main control module further comprises a power access port (840);
wherein the power access terminal (840) includes a first power access terminal and a second power access terminal;
the second end of the contactor is also connected with the first power supply access end; the second power supply access end is connected with the control end of the main control module;
the first power supply access terminal is used for providing 380V alternating current; the second power supply access terminal is used for providing 220V alternating current control signals.
8. A pressure-activatable thermal expansion valve refrigeration system as claimed in claim 1, wherein said main control module further comprises a first sensor access port (850) and a second sensor access port (860);
the output end of the first pressure sensor (600) is connected with the main control module through the first sensor access end (850); the output end of the second pressure sensor (700) is connected with the main control module through the second sensor access end (860).
9. A pressure-activatable thermal expansion valve refrigeration system as claimed in claim 1, wherein said main control module further comprises a common zero line access (870) and a first output (880);
the control end of the bypass electromagnetic valve is respectively connected with the first output end (880) and the public zero line access end (870).
10. A pressure-activatable thermal expansion valve refrigeration system as in claim 1, further comprising a low pressure protection device, said master control module further comprising a low pressure protection access port (890);
the low-voltage protection device is connected with the low-voltage protection access terminal (890);
the main control module is further configured to control the low-pressure protection device to start when the intake pressure sent by the first pressure sensor (600) is lower than a preset low-pressure protection value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597705.7U CN220669813U (en) | 2023-06-21 | 2023-06-21 | Heating power expansion valve refrigerating system capable of being started under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597705.7U CN220669813U (en) | 2023-06-21 | 2023-06-21 | Heating power expansion valve refrigerating system capable of being started under pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220669813U true CN220669813U (en) | 2024-03-26 |
Family
ID=90337025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321597705.7U Active CN220669813U (en) | 2023-06-21 | 2023-06-21 | Heating power expansion valve refrigerating system capable of being started under pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220669813U (en) |
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2023
- 2023-06-21 CN CN202321597705.7U patent/CN220669813U/en active Active
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