CN204240538U - A kind of combined type air conditioning unit surface air cooler is with shutting down defroster - Google Patents
A kind of combined type air conditioning unit surface air cooler is with shutting down defroster Download PDFInfo
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- CN204240538U CN204240538U CN201420695254.5U CN201420695254U CN204240538U CN 204240538 U CN204240538 U CN 204240538U CN 201420695254 U CN201420695254 U CN 201420695254U CN 204240538 U CN204240538 U CN 204240538U
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- electric heater
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- auxiliary reclay
- temperature switch
- cooler
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Abstract
The utility model relates to a kind of combined type air conditioning unit surface air cooler and shuts down defroster. and this kind of combined type air conditioning unit surface air cooler shuts down defroster, comprise the PTC electric heater group be installed on unitary air handling unit surface cooler bottom guard plate, be installed on temperature sensor and the controller of surface cooler water inlet pipe main line lower end, be installed on the temperature switch group of surface cooler near the end plate lower end of water inlet pipe, described temperature sensor is electrically connected with the signal input part of described controller, the control output end of described controller is electrically connected with described temperature detect switch (TDS) group, described temperature detect switch (TDS) group is electrically connected with PTC electric heater group.This kind of combined type air conditioning unit surface air cooler shuts down that defroster structure is simple, design science, control program are easily implemented, and efficiently solves and to cause because environment temperature is too low residual moisture in surface cooler copper pipe to freeze the problem of freezing surface cooler.
Description
Technical field
The utility model belongs to HVAC technical applications, and particularly a kind of combined type air conditioning unit surface air cooler shuts down defroster.
Background technology
Along with expanding economy, as the end prod of central air conditioner system, unitary air handling unit is applied to the place that hospital, market etc. need to carry out air conditioning more and more widely.Surface cooler can freeze, and also can heat, and carries out temperature and humidity like this regulate the air conditioner surroundings provided required for user for air-conditioning system.
But, for cold and severe cold area, when winter, combined air-conditioning system was out of service, due to the various reasons such as surface cooler system is unreasonable or user operation is improper, cause residual fraction moisture in surface cooler copper pipe, if environment temperature is too low, moisture residual in surface cooler copper pipe freezes then easily bursting by freezing coil pipe thus affect user's use.As the key equipment of unitary air handling unit, the bursting by freezing of surface cooler copper pipe drastically influence the service life of unit, and therefore the antifreezing measures of surface cooler are particularly important, but, solve the antifreeze effective measures of surface cooler temporarily there are no relevant report.
Summary of the invention
The technical problems to be solved in the utility model is the above-mentioned defect how overcoming prior art, provides a kind of combined type air conditioning unit surface air cooler to shut down defroster.
The utility model is achieved through the following technical solutions:
This kind of combined type air conditioning unit surface air cooler shuts down defroster; comprise the PTC electric heater group be installed on unitary air handling unit surface cooler bottom guard plate, the temperature sensor being installed on surface cooler water inlet pipe main line lower end and controller, be installed on the temperature switch group of surface cooler near the end plate lower end of water inlet pipe; described temperature sensor is electrically connected with the signal input part of described controller; the control output end of described controller is electrically connected with described temperature detect switch (TDS) group, and described temperature detect switch (TDS) group is electrically connected with PTC electric heater group.
As optimization, described temperature sensor, controller, temperature switch group and PTC electric heater group form heating control circuit;
Described PTC electric heater group comprises the first electric heater and the second electric heater;
Described temperature switch group comprises the first temperature switch and the second temperature switch, and described first temperature switch is set as 5 DEG C-8 DEG C, and described second temperature switch is set as 25 DEG C-30 DEG C;
Heating control circuit di-road branch road, comprise the first electric heater, the second electric heater, the first temperature switch, the second temperature switch, the first auxiliary reclay, the second auxiliary reclay, the 3rd auxiliary reclay and fuse;
The normally-closed contact of the first auxiliary reclay is in parallel with the normally opened contact of the 3rd auxiliary reclay forms the first parallel connection part, first electric heater is connected with the normally-closed contact of the first auxiliary reclay formation first part in series, the parallel connection of first part in series, the second electric heater and the 3rd auxiliary reclay forms the second parallel connection part, and normally-closed contact and second parallel connection part of the first parallel connection part, the second auxiliary reclay are composed in series the first branch road;
First temperature switch is connected with the first auxiliary reclay formation second part in series, second temperature switch is connected with the second auxiliary reclay formation the 3rd part in series, second part in series and the parallel connection of the 3rd part in series form the 3rd parallel connection part, and fuse and the 3rd parallel connection part are composed in series the second branch road.
As optimization, described first temperature switch is set as 5 DEG C, and described second temperature switch is set as 30 DEG C.
The beneficial effect that a kind of combined type air conditioning unit surface air cooler of the utility model shuts down defroster is:
This kind of combined type air conditioning unit surface air cooler shuts down that defroster structure is simple, design science, control program are easily implemented, and efficiently solves and to cause because environment temperature is too low residual moisture in surface cooler copper pipe to freeze the problem of freezing surface cooler; There is good actual application value and promotional value.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, this kind of combined type air conditioning unit surface air cooler shutdown defroster is described further:
Fig. 1 is the structural representation that this kind of combined type air conditioning unit surface air cooler shuts down defroster;
Fig. 2 be this kind of combined type air conditioning unit surface air cooler shut down defroster PTC electric heater work and inactive time control principle drawing.
In figure: 1 be surface cooler, 2 for PTC electric heater group, 2-1 be the first electric heater, 2-2 is that the second electric heater, 3 is temperature switch group, 3-1 is the first temperature switch, 3-2 is the second temperature switch, 4 be controller, 5 be temperature sensor, KA1 is the first auxiliary reclay, KA2 is the second auxiliary reclay, KA3 is the 3rd auxiliary reclay, FU1 is fuse, 0-N1 be system out of service time have electricity.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is further described.
As shown in Figure 1, this a kind of combined type air conditioning unit surface air cooler shuts down defroster, comprise the PTC electric heater group 2 be installed on unitary air handling unit surface cooler 1 bottom guard plate, be installed on temperature sensor 5 and the controller 4 of surface cooler 1 water inlet pipe main line lower end, be installed on the temperature switch group 3 of surface cooler 1 near the end plate lower end of water inlet pipe, described temperature sensor 5 is electrically connected with the signal input part of described controller 4, the control output end of described controller 4 is electrically connected with described temperature detect switch (TDS) group 3, described temperature detect switch (TDS) group 3 is electrically connected with PTC electric heater group 2.
Described temperature sensor 5, controller 4, temperature switch group 3 and PTC electric heater group 2 form heating control circuit;
As shown in Figure 2, described PTC electric heater group 2 comprises the first electric heater 2-1 and the second electric heater 2-2; Described temperature switch group 3 comprises the first temperature switch 3-1 and the second temperature switch 3-2, and described first temperature switch 3-1 is set as 5 DEG C, and described second temperature switch 3-2 is set as 30 DEG C;
As shown in Figure 2, heating control circuit di-road branch road, comprise the first electric heater 2-1, the second electric heater 2-2, the first temperature switch 3-1, the second temperature switch 3-2, the first auxiliary reclay KA1, the second auxiliary reclay KA2, the 3rd auxiliary reclay KA3 and fuse FU1;
As shown in Figure 2, the normally-closed contact KA1-1 of the first auxiliary reclay KA1 is in parallel with the normally opened contact KA3-1 of the 3rd auxiliary reclay KA3 forms the first parallel connection part, first electric heater 2-1 connects with the normally-closed contact KA1-1 of the first auxiliary reclay KA1 formation first part in series, first part in series, the second electric heater 2-2 and the 3rd auxiliary reclay KA3 parallel connection forms the second parallel connection part, and normally-closed contact KA2-1 and second parallel connection part of the first parallel connection part, the second auxiliary reclay KA2 are composed in series the first branch road;
As shown in Figure 2, first temperature switch 3-1 connects with the first auxiliary reclay KA1 formation second part in series, second temperature switch 3-2 connects with the second auxiliary reclay KA2 formation the 3rd part in series, second part in series and the parallel connection of the 3rd part in series form the 3rd parallel connection part, and fuse FU1 and the 3rd parallel connection part are composed in series the second branch road.
Concrete control principle is as follows:
When unitary air handling unit runs, PTC electric heater group 2 does not work;
When unitary air handling unit is shut down, and when surface cooler 1 water inlet pipe place temperature is lower than 5 DEG C, feedback signal is reached controller 4 by temperature sensor 5, controller 4 controls temperature detect switch (TDS) group 3, first temperature switch 3-1 and the second temperature switch 3-2 disconnects, first auxiliary reclay KA1 and the second auxiliary reclay KA2 must not be electric, the normally-closed contact KA1-1 of the first auxiliary reclay KA1 and the normally-closed contact KA2-1 of the second auxiliary reclay KA2 is closed, first electric heater 2-1 and the second electric heater 2-2 heats, intensity heating surface cooler 1 ambient air, to reach the antifreeze object of surface cooler 1, 3rd auxiliary reclay KA3 obtains electric, the normally opened contact KA3-1 of the 3rd auxiliary reclay KA3 closes,
When unitary air handling unit is shut down, and when surface cooler 1 water inlet pipe place temperature higher than 5 DEG C lower than 30 DEG C time, feedback signal is reached controller 4 by temperature sensor 5, controller 4 controls temperature detect switch (TDS) group 3, first temperature switch 3-1 closes, first auxiliary reclay KA1 obtains electric, the normally-closed contact KA1-1 of the first auxiliary reclay KA1 disconnects, second temperature switch 3-2 disconnects, second auxiliary reclay KA2 must not be electric, the normally-closed contact KA2-1 of the second auxiliary reclay KA2 closes, the normally opened contact KA3-1 of the 3rd auxiliary reclay KA3 closes, 3rd auxiliary reclay KA3 obtains electric, first electric heater 2-1 does not heat, second electric heater 2-2 heats, " weakness " heating surface cooler 1 ambient air, to reach the antifreeze object of surface cooler 1,
When unitary air handling unit is shut down; and when surface cooler 1 water inlet pipe place temperature is higher than 30 DEG C; feedback signal is reached controller 4 by temperature sensor 5; controller 4 controls temperature detect switch (TDS) group 3; first temperature switch 3-1 and the second temperature switch 3-2 is closed; first auxiliary reclay KA1 and the second auxiliary reclay KA2 obtains electric; the normally-closed contact KA1-1 of the first auxiliary reclay KA1 and the normally-closed contact KA2-1 of the second auxiliary reclay KA2 disconnects; first electric heater 2-1 and the second electric heater 2-2 does not heat, and avoids unnecessary power consumption.
This kind of combined type air conditioning unit surface air cooler shuts down that defroster structure is simple, design science, control program are easily implemented, and efficiently solves and to cause because environment temperature is too low residual moisture in surface cooler copper pipe to freeze the problem of freezing surface cooler.
Above-mentioned detailed description of the invention is only concrete case of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent implementations of equivalent variations.But every do not depart from the prerequisite of the utility model know-why under, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, all should fall into scope of patent protection of the present utility model.
Claims (3)
1. a combined type air conditioning unit surface air cooler is with shutting down defroster, it is characterized in that: comprise the PTC electric heater group (2) be installed on unitary air handling unit surface cooler (1) bottom guard plate, be installed on temperature sensor (5) and the controller (4) of surface cooler (1) water inlet pipe main line lower end, be installed on the temperature switch group (3) of surface cooler (1) near the end plate lower end of water inlet pipe, described temperature sensor (5) is electrically connected with the signal input part of described controller (4), the control output end of described controller (4) is electrically connected with described temperature detect switch (TDS) group (3), described temperature detect switch (TDS) group (3) is electrically connected with PTC electric heater group (2).
2. a kind of combined type air conditioning unit surface air cooler as claimed in claim 1 shuts down defroster, it is characterized in that: described temperature sensor (5), controller (4), temperature switch group (3) and PTC electric heater group (2) form heating control circuit;
Described PTC electric heater group (2) comprises the first electric heater (2-1) and the second electric heater (2-2);
Described temperature switch group (3) comprises the first temperature switch (3-1) and the second temperature switch (3-2), and described first temperature switch (3-1) is set as 5 DEG C-8 DEG C, and described second temperature switch (3-2) is set as 25 DEG C-30 DEG C;
Heating control circuit di-road branch road, comprise the first electric heater (2-1), the second electric heater (2-2), the first temperature switch (3-1), the second temperature switch (3-2), the first auxiliary reclay (KA1), the second auxiliary reclay (KA2), the 3rd auxiliary reclay (KA3) and fuse (FU1);
The normally-closed contact (KA1-1) of the first auxiliary reclay (KA1) is in parallel with the normally opened contact (KA3-1) of the 3rd auxiliary reclay (KA3) forms the first parallel connection part, first electric heater (2-1) is connected with the normally-closed contact (KA1-1) of the first auxiliary reclay (KA1) formation first part in series, first part in series, second electric heater (2-2) and the parallel connection of the 3rd auxiliary reclay (KA3) form the second parallel connection part, first parallel connection part, the normally-closed contact (KA2-1) of the second auxiliary reclay (KA2) and the second parallel connection part are composed in series the first branch road,
First temperature switch (3-1) is connected with the first auxiliary reclay (KA1) formation second part in series, second temperature switch (3-2) is connected with the second auxiliary reclay (KA2) formation the 3rd part in series, second part in series and the parallel connection of the 3rd part in series form the 3rd parallel connection part, and fuse (FU1) and the 3rd parallel connection part are composed in series the second branch road.
3. a kind of combined type air conditioning unit surface air cooler as claimed in claim 2 shuts down defroster, and it is characterized in that: described first temperature switch (3-1) is set as 5 DEG C, described second temperature switch (3-2) is set as 30 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695254.5U CN204240538U (en) | 2014-11-19 | 2014-11-19 | A kind of combined type air conditioning unit surface air cooler is with shutting down defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695254.5U CN204240538U (en) | 2014-11-19 | 2014-11-19 | A kind of combined type air conditioning unit surface air cooler is with shutting down defroster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204240538U true CN204240538U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420695254.5U Active CN204240538U (en) | 2014-11-19 | 2014-11-19 | A kind of combined type air conditioning unit surface air cooler is with shutting down defroster |
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| Country | Link |
|---|---|
| CN (1) | CN204240538U (en) |
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2014
- 2014-11-19 CN CN201420695254.5U patent/CN204240538U/en active Active
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