CN203070136U

CN203070136U - Heating and dehumidifying logic circuit with defrosting function

Info

Publication number: CN203070136U
Application number: CN 201220630693
Authority: CN
Inventors: 刘雪倩
Original assignee: Zhejiang Haide New Energy Co Ltd
Current assignee: Zhejiang Haide New Energy Co Ltd
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-07-17
Anticipated expiration: 2022-11-26

Abstract

A heating and dehumidifying logic circuit with defrosting function comprises a single-pole double-throw temperature relay, a single-pole double-throw humidity relay, two contactors and a delayed closing time relay. A delayed switching-off time relay controls power supply of a heater inside a device through the temperature relay and the humidity relay which are placed in proper positions to complete the heating and dehumidifying work of the whole device, thus ensuring that components in a cabinet are in a good running environment.

Description

A kind of heating and dehumidification logical circuit that has defrosting

Technical field:

The utility model relates to cabinet heating and dehumidification logical circuit, and it is applicable to the big converter device of frosting easily of day and night temperature.

Background technology:

When current transformer is used for day and night temperature than overall situation, in storing process, coagulate frost easily.Can't monitor during Long-distance Control and whether coagulate frost, cause current transformer short circuit or insulation fault when powering on operation easily.

The utility model content:

The purpose of this utility model is to provide a kind of heating and dehumidification logical circuit that has defrosting, and it solves wind electric converter and coagulates the problem that frost causes short trouble.

The technical solution of the utility model: a kind of heating and dehumidification logical circuit that has defrosting, it is characterized in that described heating and dehumidification logical circuit comprises four loops, in parallel between described loop and the loop; Article one, the loop is directly to be connected with the coil of first contactor by normally closed contact one end of the first single-pole double-throw (SPDT) temperature relay, the coil series connection of normally opened contact one end of the described first single-pole double-throw (SPDT) temperature relay, time-delay relay trip time, first isolating switch, first contactor; The described first single-pole double-throw (SPDT) temperature relay and humidity relay are in parallel; The second loop is the coil tandem by the normally closed contact of first contactor, the time closing time relay, second contactor, and normally closed contact, the time closing time relay of the normally opened contact of described second contactor and first contactor are in parallel; Article three, the loop is by second isolating switch, first main noddle on contactor, second temperature relay, heating resistor series connection; Article four, the loop is to be connected in series mutually by the 3rd isolating switch, second main noddle on contactor, ups power.

Advantage of the present utility model: the temperature relay by being placed on correct position and the power supply of humidity relay control device interior heater, finish the work of whole device heating and dehumidification, guarantee that device is in the good running environment in the cabinet.

Description of drawings:

Fig. 1 fundamental diagram of the present utility model;

Embodiment:

A kind of heating and dehumidification logical circuit that has defrosting is characterized in that described heating and dehumidification logical circuit comprises four loops as shown in Figure 1, and is in parallel between described loop and the loop; Article one, the loop is directly to be connected with the coil of the first contactor K1 by normally closed contact one end of the first single-pole double-throw (SPDT) temperature relay S1, the coil series connection of normally opened contact one end of the described first single-pole double-throw (SPDT) temperature relay S1, time-delay relay K trip time 5, first circuit breaker Q 1, the first contactor K1; The described first single-pole double-throw (SPDT) temperature relay S1 and humidity relay S3 are in parallel; The second loop is the coil tandem by the normally closed contact of the first contactor K1, time closing time relay K2, the second contactor K3, and the normally closed contact of the normally opened contact of the described second contactor K3 and the first contactor K1, time closing time relay K2 are in parallel; Article three, the loop is by second circuit breaker Q 2, the first contactor K1 main contact, the second temperature relay S2, heating resistor R1 series connection; Article four, the loop is to be connected in series mutually by the 3rd circuit breaker Q 3, the second contactor K3 main contact, ups power G1.

The S1 set temperature value is T1, and it is H% that S3 sets humidity, and the S2 design temperature is T2.

When needing defrost function, closed first circuit breaker Q 1 has following four kinds of duties:

First kind of state: when in-cabinet temperature＜T1 and relative humidity＜H%, the first contactor K1 coil power supply loop is in conducting state, the inner heating of cabinet.The normally closed contact of the first contactor K1 becomes off-state, and the UPS current supply circuit is in off-position.After a period of time, in-cabinet temperature＞T1 and relative humidity＜H%.Temperature relay S1 switches to and often opens node one end, and time-delay relay K 5 loops trip time are charged.The first contactor K1 continues outage after charged 1 hour.The first contactor K1 normally opened contact closure is given the second contactor K3 coil power supply through the 3s time closing of time closing time relay K2, and UPS powers on.The normally opened contact of the second contactor K3 and coil power supply loop form self-locking simultaneously.As long as the situation that humiture does not meet the demands appears in main electric normal power supply again, the UPS power-down conditions can not appear yet.

Second kind of state: when in-cabinet temperature＜T1 and relative humidity＞H%, the first contactor K1 coil power supply loop is in conducting state, the inner heating of cabinet.The normally closed contact of the first contactor K1 becomes off-state, and the UPS current supply circuit is in off-position.After after a while, in-cabinet temperature＞T1.Temperature relay S1 switches to and often opens node one end, and time-delay relay K 5 loops trip time are charged, disconnects behind the time-delay 1h.Behind the 1h, if humidity＞H% in the cabinet then continues heating humidity＜H% in cabinet, K1 outage, the UPS self-locking that powers on; If humidity＜H% in the cabinet, K1 outage, the UPS self-locking that powers on.

The third state: when in-cabinet temperature＞T1 and relative humidity＜H%, temperature relay S1 is positioned at and often opens node one end, and time-delay relay K 5 loops trip time are charged.The first contactor K1 coil power supply loop is in conducting state.The inner heating of cabinet.The normally closed contact of the first contactor K1 becomes off-state, and the UPS current supply circuit is in off-position.First contactor K1 outage behind the 1h, the UPS self-locking that powers on.

The 4th kind of state: when in-cabinet temperature＞T1 and relative humidity＞H%, temperature relay S1 is positioned at and often opens node one end, and time-delay relay K 5 loops trip time are charged.The first contactor K1 coil power supply loop is in conducting state.The inner heating of cabinet.The normally closed contact of the first contactor K1 becomes off-state, and the UPS current supply circuit is in off-position.Behind the 1h, if humidity＞H% in the cabinet then continues heating humidity＜H% in cabinet, K1 outage, the UPS self-locking that powers on; If humidity＜H% in the cabinet, K1 outage, the UPS self-locking that powers on.

When not needing defrost function, disconnect first circuit breaker Q 1, then work as the interior humidity of in-cabinet temperature＜T1 or cabinet greater than H%, heating and dehumidifying system work.

Advantage of the present utility model is to have saved this technical barrier of detection frosting, by preheating realizes the defrosting work of cupboard to cabinet.Whether can determine the needs defrost function in addition according to the actual conditions at scene, shorten the start-up time of cupboard.

Claims

1. a heating and dehumidification logical circuit that has defrosting is characterized in that described heating and dehumidification logical circuit comprises four loops, and is in parallel between described loop and the loop; Article one, the loop is directly to be connected with the coil of first contactor (K1) by normally closed contact one end of the first single-pole double-throw (SPDT) temperature relay (S1), the coil series connection of normally opened contact one end of the described first single-pole double-throw (SPDT) temperature relay (S1), time-delay relay trip time (K5), first isolating switch (Q1), first contactor (K1); The described first single-pole double-throw (SPDT) temperature relay (S1) is in parallel with humidity relay (S3); The second loop is the coil tandem by the normally closed contact of first contactor (K1), the time closing time relay (K2), second contactor (K3), and normally closed contact, the time closing time relay (K2) of the normally opened contact of described second contactor (K3) and first contactor (K1) are in parallel; Article three, the loop is by second isolating switch (Q2), first contactor (K1) main contact, second temperature relay (S2), heating resistor (R1) series connection; Article four, the loop is to be connected in series mutually by the 3rd isolating switch (Q3), second contactor (K3) main contact, ups power.