CN216431950U - Heat exchanger and unit heat radiation structure, air conditioning unit thereof - Google Patents
Heat exchanger and unit heat radiation structure, air conditioning unit thereof Download PDFInfo
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- CN216431950U CN216431950U CN202121848768.6U CN202121848768U CN216431950U CN 216431950 U CN216431950 U CN 216431950U CN 202121848768 U CN202121848768 U CN 202121848768U CN 216431950 U CN216431950 U CN 216431950U
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Abstract
The utility model discloses a heat exchanger, a unit heat dissipation structure of the heat exchanger and an air conditioning unit, wherein the unit heat dissipation structure of the heat exchanger comprises a fan, the heat dissipation structure comprises a ventilation device which is arranged on one side of the heat exchanger opposite to the fan and can be switched on and off, a temperature sensing device for detecting the temperature of the fan and a controller, the ventilation device comprises a ventilation opening and a switch valve, when the frosting condition of the heat exchanger reaches a first preset condition, the ventilation device is started to form convection with the fan of the heat exchanger, the temperature of the fan is prevented from continuously rising, the heating of the air conditioner is ensured, and when the frosting condition of the heat exchanger reaches a second preset condition, the ventilation device is closed. Compared with the prior art, when the frost layer on heat exchanger surface reaches certain thickness, can make the motor normally dispel the heat, can not take place to shut down the protection to guarantee unit sustainability heat supply.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a heat exchanger, a unit heat dissipation structure of the heat exchanger and an air conditioning unit.
Background
In order to meet market demands in various environments, the existing modular air conditioning unit needs to increase a winter heating working condition in a cold area so as to be suitable for a cold area, and when the air conditioning unit is used for heating in winter, the temperature of the use environment of the air conditioning unit is possibly lower than 0 ℃, so that a frosting phenomenon is very easy to occur on the surface of an outdoor unit (evaporator) of the unit, once the frosting condition occurs, the resistance of air flowing through a heat exchanger is easy to increase, the air flow is reduced, the heat transfer and conduction effects are poor, and the unit heating performance is very easy to attenuate; even when frosting is serious, the air port of the unit is blocked, the static pressure in the unit is too low, the motor current is too high due to too large fan load, the temperature rise of the motor of the fan is too high, the unit is shut down due to overcurrent protection reported by the motor of the fan, the motor is damaged, the energy consumption of the unit is increased, and heating for customers cannot be continued.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heat exchanger, a unit heat dissipation structure of the heat exchanger and an air conditioning unit, and solves the technical problem that an outdoor heat exchanger is seriously frosted and can not continuously perform heating under the working condition of low-temperature heating of the air conditioning unit in the prior art.
The technical scheme adopted by the utility model is as follows: a unit heat dissipation structure of a heat exchanger comprises a fan, and the heat dissipation structure comprises a ventilation device which is arranged on one side of the heat exchanger, opposite to the fan, and can be switched on and off.
Further, the ventilation device includes a vent opposite to the blower and an on-off valve provided in the vent.
Further, the heat dissipation structure of the unit further includes: the temperature sensing device is used for detecting the temperature of the fan; and the switch valve is in signal connection with the controller.
A heat exchanger comprises the unit heat dissipation structure.
An air conditioning unit comprises the unit heat radiation structure.
Compared with the prior art, when the frost layer on the surface of the heat exchanger reaches a certain thickness, the ventilation device can be selectively opened, air enters the unit through the ventilation device and forms ventilation convection with the fan, the motor can normally dissipate heat, and shutdown protection cannot occur, so that sustainable heat supply of the unit is ensured, the running stability of the unit is ensured, and the overall efficiency of the air conditioning unit is improved.
Meanwhile, frequent defrosting is not needed, so that the energy consumption of the unit is reduced, and the efficiency of the air conditioning unit is improved; the heat supply requirement of the user is met, and the user experience satisfaction is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural view of a heat exchanger according to the present invention.
1. A heat exchanger; 2. a fan; 3. a ventilation device; 31. a vent; 32. and (4) switching on and off the valve.
Detailed Description
The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, in the heat dissipation structure of the heat exchanger set provided by the present application, as shown in fig. 1, the heat exchanger set includes a plurality of fans, two fans are provided in this embodiment, the two fans are provided above the heat exchanger, and under a normal working condition of the heat exchanger set, the fans are started so that air can only flow through the heat exchanger and enter the inside of the heat exchanger set, thereby achieving a heat exchange effect of the heat exchanger; the heat dissipation structure mainly comprises a plurality of groups of ventilation devices, the ventilation devices are arranged at the lower side of the heat exchanger relative to the fan, the ventilation devices can be switched on and off, when the heat exchanger frosts to a certain degree, thick frost layers attached to the surface of the heat exchanger are blocked, air can not flow into the heat exchanger any more, convection ventilation can not be formed in the unit, static pressure is reduced, the motor can not normally dissipate heat, when the temperature rise is rapidly increased to a certain degree due to continuous increase of the load of the motor, overcurrent protection shutdown is reported, the air conditioning unit can not continuously meet the heat supply demand of a user, the switching-on and switching-off ventilation devices are arranged at the lower side of the heat exchanger relative to the fan, when the frost layers on the surface of the heat exchanger reach a certain thickness, the ventilation devices can be selected to be switched on, the air enters the unit through the ventilation devices to form ventilation convection with the fan, the motor can normally dissipate heat, and the shutdown protection cannot occur, so that the sustainable heat supply of the unit is ensured, the running stability of the unit is ensured, and the overall efficiency of the air conditioning unit is improved.
Further, ventilation unit includes the vent relative with the fan and sets up the ooff valve in the vent, wherein the vent sets up with the fan relatively, the ooff valve can be selected to open according to the frosting condition of heat exchanger and stop, when the frosting condition of heat exchanger reaches first preset condition, it is comparatively serious to explain the frosting condition of heat exchanger, has caused comparatively serious jam, can cause the fan temperature to continuously rise, alright open ventilation unit this moment so that form the convection current with the fan of heat exchanger, avoid the fan temperature to continuously rise, guarantee that the air conditioner heats.
Furthermore, the heat dissipation structure of the unit in this embodiment further includes a temperature sensor and a controller, the temperature sensor is embedded in the fan winding and is used for monitoring the motor temperature value in real time and transmitting a temperature signal to the controller, and the controller controls the on-off of the switch valve according to the temperature of the fan; it should be noted that the purpose of providing the temperature sensor here is to objectively reflect the frosting condition of the heat exchanger, and since the frosting condition of the heat exchanger directly affects the temperature change of the fan, the temperature change of the fan can be detected to directly reflect the condition of the frost layer, and the purpose of the present application is to prevent the temperature of the fan from rising to the temperature limit value of the shutdown protection, so that the temperature sensor here is used as a parameter for reflecting the frosting condition, and can also directly reflect the temperature value of the motor, thereby achieving the purpose of accurate control.
In other embodiments, the thickness of the frost layer can be detected to reflect the frosting condition, when the thickness of the frost layer causes serious blockage, the ventilation device can be controlled to be started to form convection, measures are taken in advance to avoid continuous rising of the temperature of the motor, and accordingly the shutdown risk caused by untimely heat dissipation of the fan is reduced.
It should be further added that the frosting condition can also be directly reflected by the temperature of the refrigerant at the inlet and outlet of the heat exchanger, which are common schemes in the prior art.
The application further provides an air conditioner operation method, which aims to continuously supply heat for users in winter, and specifically comprises the following steps:
s1, starting a heating mode of the air conditioning unit;
s2, monitoring the frosting condition of the heat exchanger, judging whether the frosting condition of the heat exchanger reaches a first preset condition, if so, starting a ventilation device, starting the ventilation device to form convection with a fan of the heat exchanger, avoiding the temperature of the fan continuously rising to reach the limit value of shutdown protection, and ensuring normal heating of the air conditioner;
and S3, judging whether the frosting condition of the heat exchanger reaches a second preset condition, and if so, closing the ventilation device.
Among them, it should be noted that: the first preset condition in the step S2 and the second preset condition in the step S3 are both temperature values of the fan, the temperature of the first preset condition (first preset temperature) is higher than the second preset condition (second preset temperature), the first preset condition in the step S2 is determined, and the frosting condition of the heat exchanger is detected, so that the temperature of the fan can be prevented from continuously rising, and the temperature of the fan tends to be stable or even slowly falling; and then, judging the second preset condition in the step S3, judging whether the frosting condition of the heat exchanger is better, judging whether the temperature of the fan returns to normal, and when the frosting condition meets the second preset condition, indicating that the frosting condition is better, closing the ventilation device and normally operating the fan.
The air conditioning unit monitors the environmental temperature of a user when heating normally, when the environmental temperature of the user reaches a preset value, the demand degree of the user for continuing heat supply of the air conditioning unit becomes low, and the air conditioning unit can suspend heating and enter a defrosting mode.
In this embodiment, after it is detected that the frosting condition of the heat exchanger reaches the first preset condition (the fan reaches the first preset temperature), it is indicated that the frosting condition is not optimistic, although the heating requirement of the user can be continuously met, the frosting condition cannot be twisted, at this time, the user can choose to pause to continue heating according to the environmental temperature of the user, and then defrosting is performed.
Along with the progress of defrosting, the fan of off-premises station stops the operation, and its temperature can descend gradually, and ventilation unit can control it according to step 3 mode and close this moment, and at this section time that air conditioning unit began to defrost to ventilation unit and close, ventilation unit can continue to dispel the heat to the fan, makes the temperature of fan descend fast, and the temperature of fan satisfies the second and predetermines the condition (the fan reaches the second and predetermines the temperature), and ventilation unit alright with closing.
Of course, in other embodiments, defrosting may take other forms, such as: the electric heater heats the surface of the outdoor unit to melt the frost layer; stopping the machine for defrosting, and adopting the modes of naturally melting a frost layer and the like when the outdoor temperature is higher.
Under the normal operation working condition of the air conditioning unit, the utility model can not generate any influence on the overall performance of the unit, and under the severe frosting working condition, the utility model can timely act and respond, so that the motor can not report over-current protection due to overhigh temperature rise under the severe frosting condition to influence the normal operation of the unit; and the motor is normally cooled down under the severe frosting of unit, need not to switch to the refrigeration operating mode and defrost, and user's heat supply demand is satisfied in the sustainability, improves user experience satisfaction.
Further, this application still provides a heat exchanger, and it includes foretell unit heat radiation structure.
Furthermore, the application also provides an air conditioning unit, which comprises the unit heat dissipation structure or the heat exchanger.
The above specific embodiments are only intended to illustrate the inventive concept and many modifications and variations may be made by those skilled in the art within the spirit of the utility model, which are included within the scope of the utility model.
Claims (4)
1. A heat radiation structure of a heat exchanger unit comprises a fan, and is characterized in that the heat radiation structure comprises a ventilation device which is arranged on one side of the heat exchanger opposite to the fan and can be switched on and off, and a temperature sensing device for detecting the temperature of the fan; the ventilation device comprises a ventilation opening opposite to the fan and a switch valve arranged in the ventilation opening.
2. The unit heat dissipation structure according to claim 1, further comprising: and the switch valve is in signal connection with the controller.
3. A heat exchanger comprising the unit heat dissipation structure according to any one of claims 1 to 2.
4. An air conditioning unit, characterized by comprising a unit heat dissipation structure according to any one of claims 1 to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848768.6U CN216431950U (en) | 2021-08-09 | 2021-08-09 | Heat exchanger and unit heat radiation structure, air conditioning unit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848768.6U CN216431950U (en) | 2021-08-09 | 2021-08-09 | Heat exchanger and unit heat radiation structure, air conditioning unit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216431950U true CN216431950U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121848768.6U Active CN216431950U (en) | 2021-08-09 | 2021-08-09 | Heat exchanger and unit heat radiation structure, air conditioning unit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216431950U (en) |
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2021
- 2021-08-09 CN CN202121848768.6U patent/CN216431950U/en active Active
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