CN115790066A - Safety control circuit of marine refrigeration device and control method thereof - Google Patents
Safety control circuit of marine refrigeration device and control method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of electric control, in particular to a safe control circuit of a marine refrigeration device and a control method thereof.A power supply is connected with an air cooler protection circuit, a compressor protection circuit, a start-stop setting circuit, a stop reset circuit, a start-stop control circuit, a fan start-stop circuit and a compressor start-stop circuit in parallel; through air-cooler time delay outage, protection relay and time relay protection, counter control, the control of confession liquid solenoid valve on-off combines many protection switch protection control, has effectively solved air-cooler long-pending frost, compressor liquid impact, low pressure parking reset difficult, do not restart after the power failure scheduling problem.
Description
Technical Field
The invention relates to the technical field of electric control, in particular to a safety control circuit of a refrigeration device for a ship and a control method thereof.
Background
The control of the refrigeration device for the ship is always an imperfect problem in the ship industry. In the process of sailing of ocean ships, passenger rolling ships and scientific investigation ships, the running of the refrigerating device can be influenced due to the problems of frost accumulation of an air cooler, liquid impact of a compressor, difficulty in low-pressure parking and resetting, incapability of restarting after power failure and the like, so that food is not fresh or even deteriorated, and extremely serious consequences are generated. The propulsion of the control technology of the refrigeration device is urgent in the long voyage because the ship cannot be completed because of insufficient fresh food to force the ship to return.
Disclosure of Invention
Aiming at the prior art, the invention provides a safety circuit which has multiple safety protections and simultaneously gives consideration to self-running after power failure and power restoration and a control method thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a marine refrigerator's safe type control circuit, includes the power, its characterized in that: the power supply is connected with an air cooler protection circuit, a compressor protection circuit, a start-stop setting circuit, a stop resetting circuit, a start-stop control circuit, a fan start-stop circuit and a compressor start-stop circuit which are connected in parallel; the air cooler protection circuit is formed by connecting an air cooler overload protection switch, an air cooler power protection switch and an air cooler protection relay in series; the compressor protection circuit is formed by connecting a compressor overload switch, a compressor high-voltage protection switch, a compressor overtemperature protection switch and a compressor protection relay in series; the start-stop setting circuit comprises a start button, a stop inching switch normally closed contact, an air cooler protective relay normally closed switch and a counter setting coil which are sequentially connected in series; the stop reset circuit comprises a stop inching switch Guan Changkai contact and a counter reset coil which are connected in series, and the stop inching switch normally open contact is linked with the stop inching switch normally closed contact; the start-stop control circuit comprises a counter contact, a temperature control switch and a time relay which are sequentially connected in series, and a liquid supply electromagnetic valve which is connected between a condenser and an evaporator of the compression refrigeration system in series is connected on the time relay in parallel; the fan starting and stopping circuit is formed by connecting a time relay power-off delay switch, an air cooler protective relay switch and an air cooler power connection switch relay in series; the compressor start-stop circuit comprises a time relay instantaneous normally open switch, a refrigeration system compressor air suction port low-voltage controller switch, a compressor protection relay switch and a compressor power connection switch relay which are sequentially connected in series, wherein the time relay instantaneous normally open switch is connected with a self-locking closing switch of the compressor power connection switch relay in parallel.
The remote control circuit is connected in parallel with the start button of the start-stop setting circuit and the normally closed contact of the stop inching switch, and the remote control circuit is formed by connecting the remote start switch and the remote normally closed contact of the stop inching switch in series.
And the normally open contact of the shutdown inching switch is connected with a remote normally open contact of the shutdown inching switch in parallel.
A safety control method of a refrigeration device for a ship is characterized by comprising the following steps:
(1) And an initial standby state: the air cooler overload protection switch and the air cooler power supply protection switch are both closed; the compressor overload switch, the compressor high-voltage protection switch and the compressor overtemperature protection switch are all closed; the air cooler protective relay and the compressor protective relay are powered; the air cooler protection relay switch is closed, and the compressor protection relay switch is closed;
(2) And a first starting state: when a start button is pressed, a normally closed contact of a shutdown inching switch is closed and is connected with a counter setting coil, the setting is 1, and a counter contact is connected; if the temperature control switch detects that the refrigerating temperature is lower than the set temperature, the temperature control switch is not closed, the whole machine does not need to be started, if the temperature control switch detects that the refrigerating temperature is higher than the set temperature, the temperature control switch is closed, a time relay and a liquid supply electromagnetic valve are switched on, a time relay power-off delay switch and a time relay instant normally open switch are closed, an air cooler protective relay switch is closed and is switched on an air cooler power switch relay, the air cooler power switch relay is controlled to be switched on after being electrified, the relay switch connected to an air cooler power circuit is switched on, and the air cooler is electrified to operate; meanwhile, a low-voltage controller switch is closed, a compressor protection relay switch is closed, a compressor power switch relay is connected, the compressor power switch relay controls a relay switch connected to a compressor power circuit to be closed after being electrified, the compressor runs under the condition of being electrified, a liquid supply electromagnetic valve is opened, and an exhaust and suction passage of the compressor ensures that a refrigerating system works normally for refrigeration; after the compressor power connection switch relay is electrified, the self-locking closing switch locks the electrification of the compressor electromechanical switch relay, and the time relay instantaneous normally-open switch is opened;
(3) And controlling the shutdown: manually pressing a normally closed contact of a stop point switch, setting a counter setting coil to be 1 when the electricity is cut off, still setting the counter contact not to be operated, closing a normally open contact of the stop point switch, enabling a counter reset coil to be electrified and reset to be 0, disconnecting the counter contact, supplying power to a time relay and a liquid supply electromagnetic valve, cutting off liquid supply to an evaporator by the liquid supply electromagnetic valve of a refrigerating system at the moment, monitoring that the pressure is too low by a low-voltage controller when a compressor of the refrigerating system continuously sucks air, disconnecting the switch of the low-voltage controller to supply power to a compressor power switch relay, disconnecting the relay switch of the compressor power switch relay on a compressor power circuit, stopping the compressor, and delaying disconnection of a time relay power-off delay switch at the same time, and delaying disconnection of a relay switch on an air cooler power circuit by an air cooler power switch relay, so that the air cooler is delayed to stop after the compressor stops working; when the relay of the compressor power switch is powered off, the self-locking closing switch is disconnected;
(4) And stopping temperature control: when the temperature control switch detects that the refrigerating temperature is 1-2 ℃ lower than the set temperature, the temperature control switch is turned on, the setting coil of the counter is set to be 1, the reset coil of the counter is not powered, the time relay and the liquid supply electromagnetic valve are powered off, and the subsequent stopping step is the same as the operation (3);
(5) And starting up the temperature control: after the temperature control machine is shut down, the temperature control switch detects that the refrigerating temperature is 1-2 ℃ higher than the set temperature, the temperature control switch is closed, as the setting coil of the counter is set to be 1, the reset coil of the counter is not electrified, the contact of the counter is connected, the time relay and the liquid supply electromagnetic valve are electrified, the liquid supply electromagnetic valve is opened to supply liquid to the evaporator, as the high-pressure liquid at the condenser side of the liquid supply electromagnetic valve of the refrigerating system flows to the air suction port of the compressor through the liquid supply electromagnetic valve, the low-pressure controller is connected when the monitoring pressure of the low-pressure controller reaches the low-pressure protection pressure, the low-pressure controller switch is connected, at the moment, the time relay is closed through the time relay power-off delay switch and the time relay instantaneous normally open switch, and the air cooler and the compressor complete temperature control machine starting;
(6) Starting up the machine automatically after power failure: after the power supply has power failure accidentally, the setting coil of the counter is set to be 1, the reset coil of the counter cannot be powered on, and the time relay and the liquid supply electromagnetic valve are powered off, so that the machine is stopped; after the power supply recovers power supply, the temperature control switch monitors the refrigerating temperature in real time, if the temperature is higher than the set temperature by 1-2 ℃, the subsequent starting step is the same as the step (5), if the temperature is lower than the set temperature by 1-2 ℃, the subsequent starting step is the same as the step (4);
(7) And protection shutdown: at air-cooler overload protection switch, air-cooler power protection switch, compressor overload switch, compressor high pressure protection switch, compressor overtemperature protection switch is respectively to the air-cooler, when compressor monitoring performance surpassed safety protection numerical value, the disconnection is to air-cooler protection relay, the power supply of compressor protection relay, air-cooler protection relay switch, compressor protection relay switch cuts off air-cooler electricity switch relay respectively, compressor electricity switch relay, thereby realize air-cooler power supply circuit, to the air-cooler on the compressor power supply circuit, the power-off protection of compressor.
The invention has the beneficial effects that:
when the compressor is stopped, the air cooler is switched off in a delayed manner through the power-off delay switch of the time relay, and the relay switch on the power circuit of the air cooler is switched off in a delayed manner through the power-on delay switch relay of the air cooler, so that the air cooler is stopped in a delayed manner after the compressor stops working, and the problem of frost accumulation of the air cooler is effectively solved;
the compressor start-stop circuit is provided with a low-voltage controller switch, and the compressor start-stop circuit is combined with an overload switch, a high-voltage protection switch and an over-temperature protection switch to control the compressor protection circuit to control the on-off of a compressor time relay switch through a compressor protection relay, so that the faults of liquid impact and the like during the operation of the compressor are effectively prevented.
After the compressor is shut down, the pressure in the refrigerating system is too low, the liquid is supplied to the evaporator by opening the liquid supply electromagnetic valve, high-pressure liquid on the condenser side of the liquid supply electromagnetic valve of the refrigerating system flows to an air suction port of the compressor through the liquid supply electromagnetic valve, a low-pressure controller of a compressor start-stop circuit monitors that the pressure reaches low-pressure protection pressure and then switches on a low-pressure controller switch, at the moment, a time relay is closed through a time relay power-off delay switch and a time relay instant normally-open switch, an air cooler and the compressor complete temperature control starting, and the problem of difficult low-pressure stop resetting is effectively solved.
When power is off, the normally closed contact and the normally open contact of the stop inching switch are not pressed, the counter setting coil is still set to be 1, the counter reset coil cannot be electrified, the counter contact is in a switch-on state, after power supply is restored, whether a switch-on time relay and a liquid supply electromagnetic valve perform follow-up operation or not is directly determined by the temperature control switch, the problem that the traditional power supply cannot be started automatically after power failure is effectively solved, and the safety and the stability of refrigeration temperature control are effectively guaranteed.
Drawings
Fig. 1 is a schematic diagram of the circuit of the present invention.
In the figure: the system comprises a power supply AC, a cold air blower overload protection switch FR1, a cold air blower power protection switch K, a cold air blower protection relay KA1, a compressor overload switch FR2, a compressor high-voltage protection switch HP, a compressor overtemperature protection switch STW, a compressor protection relay KA2, a start button SB1, a stop inching switch normally-closed contact SB2-1, a cold air blower protection relay normally-closed switch KA1-1, a counter set coil MOV-1, a remote start switch SB3, a stop inching switch remote normally-closed contact SB4-1, a stop inching switch normally-open contact SB2-2, a counter reset coil MOV-2, a stop inching switch remote normally-open contact SB4-2, a counter contact C1, a temperature control switch WK, a time relay KT, a liquid supply electromagnetic valve YV, a time relay power-off delay switch KT-1, a cold air blower protection switch KA1-2, a cold air blower power connection switch KM1, a time relay instantaneous normally-open switch KT-2, a low-voltage controller switch LP, a compressor protection relay, a compressor protection switch power connection relay KM2-1, a self-locking relay.
Description of the preferred embodiment
The invention is further illustrated by the following figures and examples.
FIG. 1 shows: a safety control circuit of a refrigeration device for a ship is characterized in that an air cooler protection circuit, a compressor protection circuit, a start-stop setting circuit, a stop reset circuit, a start-stop control circuit, a fan start-stop circuit and a compressor start-stop circuit which are connected in parallel are connected to a power supply AC.
In the embodiment, the air cooler protection circuit is formed by serially connecting an air cooler overload protection switch FR1, an air cooler power protection switch K and an air cooler protection relay KA 1;
in the embodiment, the compressor protection circuit is formed by connecting a compressor overload switch FR2, a compressor high-voltage protection switch HP, a compressor overtemperature protection switch STW and a compressor protection relay KA2 in series;
in the embodiment, the start-stop setting circuit comprises a start button SB1, a stop inching switch normally closed contact SB2-1, an air cooler protective relay normally closed switch KA1-1 and a counter setting coil MOV-1 which are sequentially connected in series; a remote control circuit is connected in parallel to a start button of the start-stop setting circuit and a normally closed contact of the stop inching switch, and the remote control circuit is formed by connecting a remote start switch SB3 and a remote normally closed contact SB4-1 of the stop inching switch in series.
In the embodiment, the shutdown reset circuit comprises a shutdown inching switch Guan Changkai contact SB2-2 and a counter reset coil MOV-2 which are connected in series, a shutdown inching switch remote normally-open contact SB4-2 is connected to a shutdown inching switch normally-open contact in parallel, the shutdown inching switch normally-open and normally-closed contacts are linked, and the shutdown inching switch remote normally-open and normally-closed contacts are linked;
in the embodiment, the start-stop control circuit comprises a counter contact C1, a temperature control switch WK and a time relay KT which are sequentially connected in series, wherein a liquid supply electromagnetic valve YV connected between a condenser and an evaporator of the compression refrigeration system in series is connected to the time relay in parallel, and the counter contact C1 is controlled by a counter setting coil MOV-1 and a counter reset coil MOV-2;
in the embodiment, the fan starting and stopping circuit is formed by connecting a time relay power-off delay switch KT-1, an air cooler protective relay switch KA1-2 and an air cooler power connection switch relay KM1 in series;
in the embodiment, the compressor start-stop circuit comprises a time relay instantaneous normally open switch KT-2, a low-voltage controller switch LP of a compressor suction port of a refrigeration system, a compressor protection relay switch KA2-1 and a compressor power switch relay KM2 which are sequentially connected in series, and the time relay instantaneous normally open switch is connected with a compressor power switch relay self-locking closing switch KM2-1 in parallel.
The safety control method comprises the following steps:
(1) And initial standby state: the air cooler overload protection switch and the air cooler power supply protection switch are both closed; the compressor overload switch, the compressor high-voltage protection switch and the compressor overtemperature protection switch are all closed; the air cooler protective relay and the compressor protective relay are powered; the air cooler protection relay switch is closed, and the compressor protection relay switch is closed;
(2) The first starting state: when a start button is pressed, a normally closed contact of a shutdown inching switch is closed and is connected with a counter setting coil, the setting is 1, and a counter contact is connected; if the temperature control switch detects that the refrigerating temperature is lower than the set temperature, the temperature control switch is not closed, the whole machine does not need to be started, if the temperature control switch detects that the refrigerating temperature is higher than the set temperature, the temperature control switch is closed, a time relay and a liquid supply electromagnetic valve are switched on, a time relay power-off delay switch and a time relay instant normally open switch are closed, an air cooler protective relay switch is closed and is switched on an air cooler power switch relay, the air cooler power switch relay is controlled to be switched on after being electrified, the relay switch connected to an air cooler power circuit is switched on, and the air cooler is electrified to operate; meanwhile, a low-voltage controller switch is closed, a compressor protection relay switch is closed, a compressor power switch relay is connected, the compressor power switch relay controls a relay switch connected to a compressor power circuit to be closed after being electrified, the compressor runs under the condition of being electrified, a liquid supply electromagnetic valve is opened, and an exhaust and suction passage of the compressor ensures that a refrigerating system works normally for refrigeration; after the compressor power connection switch relay is electrified, the self-locking closing switch locks the electrification of the compressor electromechanical switch relay, and the time relay instantaneous normally-open switch is opened;
(3) And controlling the shutdown: manually pressing a normally closed contact of a stop point switch, setting a counter setting coil to be 1 when the electricity is cut off, still setting the counter contact not to be operated, closing a normally open contact of the stop point switch, enabling a counter reset coil to be electrified and reset to be 0, disconnecting the counter contact, supplying power to a time relay and a liquid supply electromagnetic valve, cutting off liquid supply to an evaporator by the liquid supply electromagnetic valve of a refrigerating system at the moment, monitoring that the pressure is too low by a low-voltage controller when a compressor of the refrigerating system continuously sucks air, disconnecting the switch of the low-voltage controller to supply power to a compressor power switch relay, disconnecting the relay switch of the compressor power switch relay on a compressor power circuit, stopping the compressor, and delaying disconnection of a time relay power-off delay switch at the same time, and delaying disconnection of a relay switch on an air cooler power circuit by an air cooler power switch relay, so that the air cooler is delayed to stop after the compressor stops working; when the relay of the compressor power switch is powered off, the self-locking closing switch is disconnected;
(4) And stopping temperature control: when the temperature control switch detects that the refrigerating temperature is 1-2 ℃ lower than the set temperature, the temperature control switch is turned on, the setting coil of the counter is set to be 1, the reset coil of the counter is not powered, the time relay and the liquid supply electromagnetic valve are powered off, and the subsequent stopping step is the same as the operation (3);
(5) And starting up the temperature control: after the temperature control is stopped, the temperature control switch detects that the refrigerating temperature is 1-2 ℃ higher than the set temperature, the temperature control switch is closed, because the setting coil of the counter is set to be 1, the reset coil of the counter cannot be electrified, the contact of the counter is connected, the time relay and the liquid supply electromagnetic valve are electrified, the liquid supply electromagnetic valve is opened to supply liquid to the evaporator, because high-pressure liquid on the condenser side of the liquid supply electromagnetic valve of the refrigerating system flows to an air suction port of the compressor through the liquid supply electromagnetic valve, the low-pressure controller is connected when monitoring pressure reaches low-pressure protection pressure, the time relay is closed through the time relay power-off delay switch and the time relay instantaneous normally open switch, and the air cooler and the compressor finish temperature control starting;
(6) Starting up the machine automatically after power failure: after the power supply has power failure accidentally, the setting coil of the counter is set to be 1, the reset coil of the counter cannot be powered on, and the time relay and the liquid supply electromagnetic valve are powered off, so that the machine is stopped; when the power supply is restored, the temperature control switch monitors the refrigerating temperature in real time, if the temperature is higher than the set temperature by 1-2 ℃, the subsequent starting-up steps are the same as the step (5), if the temperature is lower than the set temperature by 1-2 ℃, the subsequent starting-up steps are the same as the step (4);
(7) And protection shutdown: at air-cooler overload protection switch, air-cooler power protection switch, compressor overload switch, compressor high pressure protection switch, compressor overtemperature protection switch is respectively to the air-cooler, when compressor monitoring performance surpassed the safety protection numerical value, the disconnection is to air-cooler protection relay, the power supply of compressor protection relay, air-cooler protection relay switch, compressor protection relay switch breaks off the air-cooler respectively and connects electric switch relay, compressor connects electric switch relay, thereby realize the air-cooler power supply circuit, to the air-cooler on the compressor power supply circuit, the power-off protection of compressor.
Claims (4)
1. The utility model provides a marine refrigerator's safe type control circuit, includes the power, its characterized in that: the power supply is connected with an air cooler protection circuit, a compressor protection circuit, a start-stop setting circuit, a stop reset circuit, a start-stop control circuit, a fan start-stop circuit and a compressor start-stop circuit which are connected in parallel; the air cooler protection circuit is formed by connecting an air cooler overload protection switch, an air cooler power protection switch and an air cooler protection relay in series; the compressor protection circuit is formed by connecting a compressor overload switch, a compressor high-voltage protection switch, a compressor overtemperature protection switch and a compressor protection relay in series; the start-stop setting circuit comprises a start button, a stop inching switch normally closed contact, an air cooler protective relay normally closed switch and a counter setting coil which are sequentially connected in series; the stop reset circuit comprises a stop inching switch Guan Changkai contact and a counter reset coil which are connected in series, and the stop inching switch normally open contact is linked with the stop inching switch normally closed contact; the start-stop control circuit comprises a counter contact, a temperature control switch and a time relay which are sequentially connected in series, and a liquid supply electromagnetic valve which is connected between a condenser and an evaporator of the compression refrigeration system in series is connected on the time relay in parallel; the fan starting and stopping circuit is formed by connecting a time relay power-off delay switch, an air cooler protective relay switch and an air cooler power connection switch relay in series; the compressor start-stop circuit comprises a time relay instantaneous normally open switch, a refrigeration system compressor air suction port low-voltage controller switch, a compressor protection relay switch and a compressor power connection switch relay which are sequentially connected in series, wherein the time relay instantaneous normally open switch is connected with a self-locking closing switch of the compressor power connection switch relay in parallel.
2. The safety control circuit of a refrigeration unit for ships according to claim 1, wherein: the remote control circuit is connected in parallel with the start button of the start-stop setting circuit and the normally closed contact of the stop inching switch, and the remote control circuit is formed by connecting the remote start switch and the remote normally closed contact of the stop inching switch in series.
3. The safety control circuit of a refrigeration unit for ships according to claim 1, wherein: and the normally open contact of the stop inching switch is connected in parallel with the remote normally open contact of the stop inching switch.
4. A safety control method of a refrigeration device for a ship is characterized by comprising the following steps:
(1) And initial standby state: the air cooler overload protection switch and the air cooler power supply protection switch are both closed; the compressor overload switch, the compressor high-voltage protection switch and the compressor overtemperature protection switch are all closed; the air cooler protective relay and the compressor protective relay are powered; the air cooler protective relay switch is closed, and the compressor protective relay switch is closed;
(2) The first starting state: when a start button is pressed, the normally closed contact of the shutdown electric switch is closed and is connected with a counter setting coil, the setting is 1, and the counter contact is connected; if the temperature control switch detects that the refrigerating temperature is lower than the set temperature, the temperature control switch is not closed, the whole machine does not need to be started, if the temperature control switch detects that the refrigerating temperature is higher than the set temperature, the temperature control switch is closed, a time relay and a liquid supply electromagnetic valve are switched on, a time relay power-off delay switch and a time relay instant normally open switch are closed, an air cooler protective relay switch is closed and is switched on an air cooler power switch relay, the air cooler power switch relay is controlled to be switched on after being electrified, the relay switch connected to an air cooler power circuit is switched on, and the air cooler is electrified to operate; meanwhile, a low-voltage controller switch is closed, a compressor protection relay switch is closed, a compressor power switch relay is connected, the compressor power switch relay controls a relay switch connected to a compressor power circuit to be closed after being electrified, the compressor runs under the condition of being electrified, a liquid supply electromagnetic valve is opened, and an exhaust and suction passage of the compressor ensures that a refrigerating system works normally for refrigeration; after the compressor power connection switch relay is electrified, the self-locking closing switch locks the electrification of the compressor electromechanical switch relay, and the time relay instantaneous normally-open switch is opened;
(3) And controlling the shutdown: manually pressing a normally closed contact of a stop point switch, setting a counter setting coil to be 1 when the electricity is cut off, still setting the counter contact not to be operated, closing a normally open contact of the stop point switch, enabling a counter reset coil to be electrified and reset to be 0, disconnecting the counter contact, supplying power to a time relay and a liquid supply electromagnetic valve, cutting off liquid supply to an evaporator by the liquid supply electromagnetic valve of a refrigerating system at the moment, monitoring that the pressure is too low by a low-voltage controller when a compressor of the refrigerating system continuously sucks air, disconnecting the switch of the low-voltage controller to supply power to a compressor power switch relay, disconnecting the relay switch of the compressor power switch relay on a compressor power circuit, stopping the compressor, and delaying disconnection of a time relay power-off delay switch at the same time, and delaying disconnection of a relay switch on an air cooler power circuit by an air cooler power switch relay, so that the air cooler is delayed to stop after the compressor stops working; when the relay of the compressor power switch is powered off, the self-locking closing switch is disconnected;
(4) And stopping temperature control: when the temperature control switch detects that the refrigerating temperature is 1-2 ℃ lower than the set temperature, the temperature control switch is turned on, the setting coil of the counter is set to be 1, the reset coil of the counter is not powered, the time relay and the liquid supply electromagnetic valve are powered off, and the subsequent stopping step is the same as the operation (3);
(5) And starting up the temperature control: after the temperature control machine is shut down, the temperature control switch detects that the refrigerating temperature is 1-2 ℃ higher than the set temperature, the temperature control switch is closed, as the setting coil of the counter is set to be 1, the reset coil of the counter is not electrified, the contact of the counter is connected, the time relay and the liquid supply electromagnetic valve are electrified, the liquid supply electromagnetic valve is opened to supply liquid to the evaporator, as the high-pressure liquid at the condenser side of the liquid supply electromagnetic valve of the refrigerating system flows to the air suction port of the compressor through the liquid supply electromagnetic valve, the low-pressure controller is connected when the monitoring pressure of the low-pressure controller reaches the low-pressure protection pressure, the low-pressure controller switch is connected, at the moment, the time relay is closed through the time relay power-off delay switch and the time relay instantaneous normally open switch, and the air cooler and the compressor complete temperature control machine starting;
(6) Starting up the machine automatically after power failure: after the power supply has power failure accidentally, the setting coil of the counter is set to be 1, the reset coil of the counter cannot be powered on, and the time relay and the liquid supply electromagnetic valve are powered off, so that the machine is stopped; after the power supply recovers power supply, the temperature control switch monitors the refrigerating temperature in real time, if the temperature is higher than the set temperature by 1-2 ℃, the subsequent starting step is the same as the step (5), if the temperature is lower than the set temperature by 1-2 ℃, the subsequent starting step is the same as the step (4);
(7) And protection shutdown: at air-cooler overload protection switch, air-cooler power protection switch, compressor overload switch, compressor high pressure protection switch, compressor overtemperature protection switch is respectively to the air-cooler, when compressor monitoring performance surpassed the safety protection numerical value, the disconnection is to air-cooler protection relay, the power supply of compressor protection relay, air-cooler protection relay switch, compressor protection relay switch breaks off the air-cooler respectively and connects electric switch relay, compressor connects electric switch relay, thereby realize the air-cooler power supply circuit, to the air-cooler on the compressor power supply circuit, the power-off protection of compressor.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205415A (en) * | 1997-12-21 | 1999-01-20 | 叶可 | Personal air conditioner |
| CN1300386A (en) * | 1998-05-15 | 2001-06-20 | 瓦马特拉法格有限公司 | Multipoint digital temperature controller |
| CN104833153A (en) * | 2014-02-11 | 2015-08-12 | 珠海格力电器股份有限公司 | Control circuit and control method of water chilling unit for ships |
| CN207585206U (en) * | 2017-10-19 | 2018-07-06 | 江苏兆胜空调有限公司 | A kind of refrigeration chamber system, control circuit peculiar to vessel |
| CN112350643A (en) * | 2020-11-11 | 2021-02-09 | 海明（江苏）环境科技有限公司 | Two marine water pump trouble automatic switch-over control circuit |
| CN216437088U (en) * | 2021-08-17 | 2022-05-03 | 海南金盘智能科技股份有限公司 | Marine soft start cabinet |
-
2023
- 2023-02-08 CN CN202310082915.0A patent/CN115790066B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205415A (en) * | 1997-12-21 | 1999-01-20 | 叶可 | Personal air conditioner |
| CN1300386A (en) * | 1998-05-15 | 2001-06-20 | 瓦马特拉法格有限公司 | Multipoint digital temperature controller |
| CN104833153A (en) * | 2014-02-11 | 2015-08-12 | 珠海格力电器股份有限公司 | Control circuit and control method of water chilling unit for ships |
| CN207585206U (en) * | 2017-10-19 | 2018-07-06 | 江苏兆胜空调有限公司 | A kind of refrigeration chamber system, control circuit peculiar to vessel |
| CN112350643A (en) * | 2020-11-11 | 2021-02-09 | 海明（江苏）环境科技有限公司 | Two marine water pump trouble automatic switch-over control circuit |
| CN216437088U (en) * | 2021-08-17 | 2022-05-03 | 海南金盘智能科技股份有限公司 | Marine soft start cabinet |
Non-Patent Citations (1)
| Title |
|---|
| 杜杨主编, 哈尔滨工程大学出版社 * |
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| CN115790066B (en) | 2023-05-30 |
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