Heat exchanger control circuit capable of automatically draining water after power failure

Abstract

The utility model relates to the technical field of heat exchanger circuits, in particular to a heat exchanger control circuit capable of automatically draining water after power failure, which comprises a first input port, a second input port, a storage battery, a switching value transmitter, a waterway heat exchanger, a first electric valve and a second electric valve. The switching value transmitter comprises a first control part and a first switching part; the waterway heat exchanger comprises a first heat exchange channel and a second heat exchange channel; the first electric valve and the second electric valve are connected with a water inlet of the first heat exchange channel and a water outlet of the first heat exchange channel respectively. The storage battery provides power, the first electric valve and the second electric valve are allowed to cut off the waterway under the condition that the unit is powered off for a long time, the drainage valve and the atmosphere pressure equalizing valve are opened to drain water, the buzzer works, and power-off feedback is carried out on the upper computer, so that the waterway heat exchanger and the unit are protected.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger circuit technology, specifically to a heat exchanger control circuit that automatically drains water after power failure. Background Technology

[0002] In existing technology, many air conditioning units are equipped with water heat exchangers to achieve efficient heat exchange. However, in cold regions or winter conditions, when the outside temperature drops below freezing, these units face a common problem: if a sudden power outage occurs and the water in the heat exchanger fails to drain in time, it may freeze and cause the heat exchanger to crack. Worse still, if the frozen water thaws, moisture may enter the compressor or other critical components, causing serious damage and potentially leading to the failure of the entire system.

[0003] To address these challenges, some manufacturers have attempted to prevent freezing by adding antifreeze. However, this method is not always feasible, especially in applications with strict water quality requirements or where legal regulations restrict the use of antifreeze. Furthermore, retrofitting older equipment that is already installed without a pre-designed antifreeze circulation system is prohibitively expensive. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by providing a heat exchanger control circuit that automatically drains water after a power outage.

[0005] The purpose of this utility model is achieved through the following technical solution: a heat exchanger control circuit that automatically drains water after power failure, including a first input port, a second input port, a storage battery, a switch transmitter, a water heat exchanger, a first electric valve and a second electric valve.

[0006] The battery includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the first input port and the second input port are respectively connected to the first input terminal and the second input terminal; the heat exchanger control circuit that automatically drains water after power failure also includes a test load; the test load is located between the first input terminal and the first input port and between the second input terminal and the second input port;

[0007] The digital transmitter includes a first control unit and a first switch unit; the first control unit is used to detect the current of the test load; one end of the first switch unit is connected to a first output terminal; the other end of the first switch unit is connected to a second output terminal through a first electric valve and a second electric valve respectively.

[0008] The water heat exchanger includes a first heat exchange channel and a second heat exchange channel; the first electric valve and the second electric valve are respectively connected to the inlet and outlet of the first heat exchange channel.

[0009] The present invention is further configured such that the first output terminal and the second output terminal are used to supply power to the first control unit.

[0010] The present invention is further configured such that the heat exchanger control circuit for automatic drainage after power failure also includes a buzzer; the other end of the first switch is connected to the second output end via the buzzer.

[0011] The present invention is further configured such that the heat exchanger control circuit for automatic drainage after power failure also includes a temperature control switch; the temperature control switch includes a second control unit and a second switch unit.

[0012] The first output terminal and the second output terminal are used to supply power to the second control unit; one end of the second switch unit is connected to the other end of the first switch unit; the other end of the second switch unit is connected to the second output terminal through the first electric valve and the second electric valve respectively.

[0013] The present invention is further configured such that the heat exchanger control circuit for automatic drainage after power failure also includes a manual switch; one end of the manual switch is connected to the other end of the second switch unit; the other end of the manual switch is connected to the second output terminal through the first electric valve and the second electric valve respectively.

[0014] The present invention is further configured such that the heat exchanger control circuit for automatic drainage after power failure also includes a time delay relay, a drain valve, and an atmospheric pressure equalization valve; the time delay relay includes a third control unit and a third switch unit.

[0015] The other end of the first switch unit is connected to the second output terminal via the third control unit;

[0016] The other end of the first switch is connected to one end of the third switch; the other end of the third switch is connected to the second output end through a drain valve and an atmospheric pressure equalization valve respectively.

[0017] The drain valve is located between the inlet of the first heat exchange channel and the first electric valve; the atmospheric equalization valve is located between the outlet of the first heat exchange channel and the second electric valve.

[0018] The present invention is further configured such that the heat exchanger control circuit for automatic drainage after power failure also includes an intermediate relay; the other end of the third switch is connected to the second output terminal through the intermediate relay.

[0019] The present invention is further provided with a circuit breaker between the first input terminal and the first input port and between the second input terminal and the second input port.

[0020] The beneficial effects of this utility model are as follows: This utility model uses a storage battery to provide power. In the event of a long-term power outage of the unit, the first electric valve and the second electric valve are allowed to cut off the water circuit. The drain valve and the atmospheric equalization valve are opened to drain the water. The buzzer is activated and a power outage feedback is sent to the host computer, thereby protecting the water circuit heat exchanger and the unit. Attached Figure Description

[0021] The utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present utility model. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0022] Figure 1 This is the circuit diagram of this utility model;

[0023] Figure 2 This is a schematic diagram of the water circuit heat exchanger of this utility model;

[0024] The components are as follows: 11. First input port; 12. Second input port; 2. Battery; 21. First input terminal; 22. Second input terminal; 23. First output terminal; 24. Second output terminal; 3. Water heat exchanger; 31. First heat exchange channel; 32. Second heat exchange channel; 41. First electric valve; 42. Second electric valve; 51. Test load; 52. Buzzer; 53. Manual switch; 54. Circuit breaker; 61. First control unit; 62. First switch unit; 71. Second control unit; 72. Second switch unit; 81. Third control unit; 82. Third switch unit; 91. Drain valve; 92. Atmospheric equalizing valve; 93. Intermediate relay. Detailed Implementation

[0025] The present invention will be further described in conjunction with the following embodiments.

[0026] Depend on Figures 1 to 2 As can be seen, the heat exchanger control circuit for automatic drainage after power failure described in this embodiment includes a first input port 11, a second input port 12, a storage battery 2, a switch transmitter, a water heat exchanger 3, a first electric valve 41, and a second electric valve 42.

[0027] The battery 2 includes a first input terminal 21, a second input terminal 22, a first output terminal 23, and a second output terminal 24; the first input port 11 and the second input port 12 are respectively connected to the first input terminal 21 and the second input terminal 22; the heat exchanger control circuit that automatically drains water after power failure also includes a test load 51; the test load 51 is located between the first input terminal 21 and the first input port 11 and between the second input terminal 22 and the second input port 14.

[0028] The digital transmitter includes a first control unit 61 and a first switch unit 62; the first control unit 61 is used to detect the current of the test load 51; one end of the first switch unit 62 is connected to the first output terminal 23; the other end of the first switch unit 62 is connected to the second output terminal 24 through the first electric valve 41 and the second electric valve 42 respectively.

[0029] The water heat exchanger 3 includes a first heat exchange channel 31 and a second heat exchange channel 32; the first electric valve 41 and the second electric valve 42 are respectively connected to the inlet and outlet of the first heat exchange channel 31.

[0030] Specifically, in the heat exchanger control circuit for automatic drainage after power failure described in this embodiment, the first input port 11 and the second input port 12 are connected to 220V AC power respectively during use. When the 220V AC power supply is normal, the battery 2 is kept in a charging or fully charged state. At this time, the test load 51 can output current to the first control unit 61 of the switch transmitter. The first control unit 61 detects the current of the test load 51 in real time. When the current of the test load 51 is within the normal threshold range, the first switch unit 62 is in the off state. At this time, the first electric valve 41 and the second electric valve 42 are in the open state.

[0031] When the 220V AC power supply is interrupted, the current at the test load 51 changes. The first control unit 61 of the switch transmitter senses this current change and controls the first switch unit 62 to close. This energizes and closes the first and second electric valves 41, thus cutting off the inlet and outlet of the first heat exchange channel 31 of the water heat exchanger 3. This prevents all the heat transfer fluid in the water circuit from being completely drained, ensuring that only the heat transfer fluid inside the water heat exchanger 3 is discharged. Then, by opening the drain valve 91, the heat transfer fluid inside the first heat exchange channel 31 of the water heat exchanger 3 is discharged.

[0032] This embodiment describes a heat exchanger control circuit that automatically drains water after a power outage. The first output terminal 23 and the second output terminal 24 are used to supply power to the first control unit 61. This arrangement facilitates the supply of power to the first control unit 61.

[0033] The heat exchanger control circuit for automatic drainage after power failure described in this embodiment also includes a buzzer 52; the other end of the first switch 62 is connected to the second output terminal 24 via the buzzer 52.

[0034] Specifically, through the above settings, when the 220V AC power supply stops, the current at the test load 51 changes. After the first control unit 61 of the switch transmitter senses the change in current at the test load 51, it controls the first switch unit 62 to close, so that the buzzer 52 receives voltage and performs an alarm.

[0035] The heat exchanger control circuit for automatic drainage after power failure described in this embodiment further includes a temperature control switch; the temperature control switch includes a second control unit 71 and a second switch unit 72.

[0036] The first output terminal 23 and the second output terminal 24 are used to supply power to the second control unit 71; one end of the second switch unit 72 is connected to the other end of the first switch unit 62; the other end of the second switch unit 72 is connected to the second output terminal 24 through the first electric valve 41 and the second electric valve 42 respectively.

[0037] Specifically, when the 220V AC power supply stops, the current at the test load 51 changes. The first control unit 61 of the switch transmitter senses the change in current at the test load 51 and controls the first switch unit 62 to close. In addition, when the ambient temperature reaches the set value, the second switch unit 72 automatically closes, thereby energizing and closing the first electric valve 41 and the second electric valve 42. In this embodiment, by setting a temperature control switch, the entire system is limited to operating under the set temperature regulation.

[0038] This embodiment describes a heat exchanger control circuit for automatic drainage after power failure. The circuit further includes a manual switch 53; one end of the manual switch 53 is connected to the other end of the second switch unit 72; the other end of the manual switch 53 is connected to the second output terminal 24 via the first electric valve 41 and the second electric valve 42. With this configuration, when the unit needs to be powered off for maintenance or other similar situations, the first electric valve 41 and the second electric valve 42 can be manually disconnected, preventing the load from activating.

[0039] The heat exchanger control circuit for automatic drainage after power failure described in this embodiment further includes a time delay relay, a drain valve 91, and an atmospheric pressure equalization valve 92; the time delay relay includes a third control unit 81 and a third switch unit 82.

[0040] The other end of the first switch unit 62 is connected to the second output terminal 24 via the third control unit 81;

[0041] The other end of the first switch part 62 is connected to one end of the third switch part 82; the other end of the third switch part 82 is connected to the second output end 24 through the drain valve 91 and the atmospheric pressure equalization valve 92 respectively.

[0042] The drain valve 91 is located between the inlet of the first heat exchange channel 31 and the first electric valve 41; the atmospheric equalization valve 92 is located between the outlet of the first heat exchange channel 31 and the second electric valve 42.

[0043] Specifically, when the 220V AC power supply stops, the current at the test load 51 changes. After the first control unit 61 of the switch transmitter senses the change in current at the test load 51, it controls the first switch unit 62 to close, thereby energizing and closing the first electric valve 41 and the second electric valve 42, thus cutting off the inlet and outlet of the first heat exchange channel 31 of the water heat exchanger 3, preventing all the heat transfer fluid in the water circuit from being completely drained, and ensuring that only the heat transfer fluid inside the water heat exchanger 3 is discharged.

[0044] In addition, when the first switch 62 is closed, the third control unit 81 receives voltage. After a delay, the third switch 82 closes, thereby causing the drain valve 91 and the atmospheric equalization valve 92 to receive voltage. The drain valve 91 and the atmospheric equalization valve 92 open, thereby discharging the heat transfer fluid inside the first heat exchange channel 31 of the water heat exchanger 3.

[0045] This embodiment describes a heat exchanger control circuit for automatic drainage after power failure. The control circuit further includes an intermediate relay 93. The other end of the third switch 82 is connected to the second output terminal 24 via the intermediate relay 93. With this configuration, when the first switch 62 closes, the third control unit 81 receives voltage. After a delay, the third switch 82 closes, causing the intermediate relay 93 to receive voltage and output a switching drainage signal or 220V voltage to the host computer.

[0046] The heat exchanger control circuit for automatic drainage after power failure described in this embodiment includes a circuit breaker 54 between the first input terminal 21 and the first input port 11, and between the second input terminal 22 and the second input port 12. This arrangement facilitates control over the connection and disconnection between the first input terminal 21 and the first input port 11, and between the second input terminal 22 and the second input port 12.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A control circuit for a heat exchanger which automatically drains after power is removed, characterized by: The application relates to a power-off automatic drainage heat exchanger control circuit, which comprises a first input port (11), a second input port (12), a storage battery (2), an on-off variable transmitter, a water route heat exchanger (3), a first electric valve (41) and a second electric valve (42). The storage battery (2) comprises a first input end (21), a second input end (22), a first output end (23) and a second output end (24); the first input port (11) and the second input port (12) are connected with the first input end (21) and the second input end (22) respectively; the power-off automatic drainage heat exchanger control circuit further comprises a test load (51); the test load (51) is arranged between the first input end (21) and the first input port (11) and between the second input end (22) and the second input port (12). The on-off variable transmitter comprises a first control part (61) and a first switch part (62); the first control part (61) is used for detecting the current of the test load (51); one end of the first switch part (62) is connected with the first output end (23); the other end of the first switch part (62) is connected with the second output end (24) through the first electric valve (41) and the second electric valve (42) respectively. The water route heat exchanger (3) comprises a first heat exchange channel (31) and a second heat exchange channel (32); the first electric valve (41) and the second electric valve (42) are connected with the water inlet of the first heat exchange channel (31) and the water outlet of the first heat exchange channel (31) respectively.

2. The control circuit for a heat exchanger with automatic drainage after power failure according to claim 1, characterized in that: The first output end (23) and the second output end (24) are used for supplying power to the first control part (61).

3. The control circuit for a heat exchanger with automatic drainage after power failure according to claim 1, characterized in that: The power-off automatic drainage heat exchanger control circuit further comprises a buzzer (52); the other end of the first switch part (62) is connected with the second output end (24) through the buzzer (52).

4. The control circuit for a heat exchanger with automatic drainage after power failure according to claim 1, characterized in that: The power-off automatic drainage heat exchanger control circuit further comprises a temperature control switch; the temperature control switch comprises a second control part (71) and a second switch part (72). The first output end (23) and the second output end (24) are used for supplying power to the second control part (71); one end of the second switch part (72) is connected with the other end of the first switch part (62); the other end of the second switch part (72) is connected with the second output end (24) through the first electric valve (41) and the second electric valve (42) respectively.

5. The control circuit for a heat exchanger with automatic post-power-off water discharge according to claim 4, characterized in that: The power-off automatic drainage heat exchanger control circuit further comprises a manual switch (53); one end of the manual switch (53) is connected with the other end of the second switch part (72); the other end of the manual switch (53) is connected with the second output end (24) through the first electric valve (41) and the second electric valve (42) respectively.

6. The control circuit for a heat exchanger that automatically drains upon power loss according to claim 1, wherein: The power-off automatic drainage heat exchanger control circuit further comprises a delay relay, a drainage valve (91) and an atmospheric pressure equalizing valve (92); the delay relay comprises a third control part (81) and a third switch part (82). The other end of the first switch part (62) is connected with the second output end (24) through the third control part (81); The other end of the first switch part (62) is connected with the second output end (24) through the third control part (81); One end of the first switch part (62) is connected with one end of the second switch part (71); the other end of the second switch part (71) is connected with the first output end (23) through the water pump (71) and the atmospheric pressure equalizing valve (72) in sequence; The water pump (71) is arranged between the water inlet of the first heat exchange channel (31) and the first electric valve (41); the atmospheric pressure equalizing valve (72) is arranged between the water outlet of the first heat exchange channel (31) and the second electric valve (42).

7. The control circuit for a heat exchanger which automatically drains after power loss according to claim 6, wherein: The control circuit of the heat exchanger capable of automatically draining water after power failure further comprises an intermediate relay (93); the other end of the third switch part (82) is connected with the second output end (24) through the intermediate relay (93).

8. The control circuit for a heat exchanger which automatically drains after power is removed according to claim 1, wherein: A circuit breaker (54) is arranged between the first input end (21) and the first input port (11) and between the second input end (22) and the second input port (12).

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