This application claims the benefit of Chinese Patent Application No. 200810116677.6 filed Jul. 15, 2008, which is incorporated herein by reference in its entirety.
The present invention relates to a temperature control device of air conditioner for heat ventilating and air conditioning, particularly to a temperature controller.
Temperature controller is applied to air conditioner for heat ventilating and air conditioning, such as a central air conditioner or household central air conditioner in buildings or villas. Temperature controller is a common temperature control device used in air conditioner for heat ventilating and air conditioning.
Temperature controller can be used in each house or each room. A desired temperature is preset in each house, and actual blowing temperature of a certain air conditioner is compared with the preset temperature through the temperature controller. The temperature controller will control opening and closing of the air conditioner based on the difference between the actual blowing temperature and the preset temperature, thereby adjusting the temperature of the air conditioner.
With reference to
Therefore, a solution for a temperature controller, which can solve the abovementioned problems, needs to be proposed by those skilled in the art.
The present invention aims at providing a temperature controller, which gets rid of alkaline batteries, thereby reducing cost and environmental pollution.
The present invention particularly provides a temperature controller which comprises a control circuit, the temperature controller further comprises a charging circuit and a chargeable battery, the charging circuit functions to charge the chargeable battery and at the same time supply power to the control circuit.
Preferably, the charging circuit is connected to an external USB interface, which functions to connect an external power source, so as to supply power to the charging circuit.
Preferably, voltage of the external power source connected with the USB interface is of 5 volt direct current.
Preferably, the charging circuit includes a voltage monitoring unit and a power transistor, when it is detected by the voltage monitoring unit that input voltage of the charging circuit is higher than voltage of the chargeable battery, the power transistor will turn on and the chargeable battery will be charged by the charging circuit.
Preferably, the charging circuit is connected with a converting circuit which is in turn connected with an external alternating current power source; the converting circuit functions to convert alternating current supplied by the external alternating current power source into direct current which can be used by the charging circuit.
Preferably, the charging circuit includes a voltage monitoring unit and a power transistor, when it is detected by the voltage monitoring unit that input voltage of the charging circuit is higher than voltage of the chargeable battery, the power transistor will turn on and the chargeable battery will be charged by the charging circuit.
Preferably, the converting circuit includes a rectifying unit and a step-down unit, the rectifying unit functions to convert alternating current supplied by the external alternating current power source into direct current; the step-down unit functions to make voltage of the direct current converted by the rectifying unit become lower, and the lower direct current is supplied to the charging circuit.
Preferably, voltage of the external alternating current power source is 24 volt, 110 volt or 220 volt.
Preferably, the chargeable battery is lithium battery.
Preferably, the charging circuit is integrated with the control circuit.
Preferably, the charging circuit, the converting circuit and the control circuit are integrated with each other.
Comparing with temperature controllers in prior art, the temperature controller of the present invention has following advantages:
The temperature controller provided by the present invention includes a charging circuit and a chargeable battery. When the electricity of the chargeable battery is used up, the charging circuit, which is connected with an external power source, can charge the chargeable battery and at the same time supply power to the control circuit. Since the chargeable battery can be reused, cost of the temperature controller and environmental pollution caused by using alkaline batteries can be accordingly reduced.
In order to make the above objects, features and advantages of the present invention more apparent, embodiments of the invention will be detailedly described with reference to the drawings in the following.
With reference to
The temperature controller according to the invention includes a charging circuit 201, a chargeable battery 202 and a control circuit 203.
The chargeable battery 202 is charged by the charging circuit 201. The control circuit 203 is powered by the chargeable battery 202 when the chargeable battery 202 is charged by the charging circuit 201.
It is preferred that lithium battery is used as the chargeable battery 202, since lithium battery is less than alkaline battery in pollution, and also charging and discharging effect of lithium battery is more excellent than that of alkaline battery.
The charging circuit 201 can charge the chargeable battery 202 by connecting to an external DC (direct current) power source of 5 volt. During the process of charging, the 5 volt DC power source may directly supply power to the control circuit 203.
The temperature controller according to embodiments of the invention includes a charging circuit 201, a chargeable battery 202 and a control circuit 203. At the time of the charging circuit 201 charging the chargeable battery 202, the charging circuit 201 also serves as a power source of the control circuit 203. In the temperature controller according to embodiments of the invention, the chargeable battery 202 is charged by an external power source, since the chargeable battery 202 can be reused repeatedly, the cost of power source of the temperature controller as well as consumption of batteries are therefore reduced.
The charging circuit 201 can be connected to the power source via interface of Universal Serial Bus (USB).
When the charging circuit 201 is connected with interface of USB, the USB interface is connected with the 5 volt DC power source, thereby providing the charging circuit 201 with power. Therefore, the charging circuit 201 can charge the chargeable battery 202.
Of course, the charging circuit 201 can be connected to the 5 volt DC power source via other interfaces and accordingly charge the chargeable battery 202.
With reference to
The difference between the temperature controller of the second embodiment of the invention and the temperature controller of the first embodiment lies in that the external power source is an alternating current power source.
The temperature controller according to the second embodiment of the invention includes a converting circuit 301, a charging circuit 302, a chargeable battery 303 and a control circuit 304.
The converting circuit 301 is connected to the external alternating current power source, for converting the alternating current supplied from the external alternating current power source into direct current which can be used by the charging circuit 302.
The charging circuit 302 can charge the chargeable battery 303 while serving as power source of the control circuit 304.
The converting circuit 301 converts the alternating current supplied into 5 volt direct current and supplies the direct current to the charging circuit 302.
As a result of providing the converting circuit 301, applications of the temperature controller according to embodiments of the invention can be increased, in the case that USB interface is unavailable, alternating current can be converted into direct current, which can be used by the charging circuit 302, by the converting circuit 301, thereby charging the chargeable battery 303.
With reference to
The converting circuit 301 according to embodiments of the invention may include a rectifying unit 401 and a step-down unit 402.
The rectifying unit 401 converts the external alternating current supplied into direct current.
The step-down unit 402 reduces the voltage of the direct current converted by the rectifying unit 401 and supplies the direct current of reduced voltage to the charging circuit.
In the temperature controller according to embodiments of the invention, the external alternating current can be converted by the converting circuit 301 into direct current for supplying to the charging circuit 302. With employment of the converting circuit 301, the temperature controller can be directly connected to an external power source, thereby broadening application scope of the temperature controller.
To reduce volume of the internal circuit of the temperature controller, the converting circuit 301 and the charging circuit 302 can be integrated with the control circuit 304 and provided in a single circuit board.
Of course, the converting circuit 301 and the charging circuit 302 can be designed individually and connected to the control circuit 304 by means of lead etc.
In the following, operating principles of the converting circuit according to embodiments of the invention will be described in detail with a 24 volt direct current power source taking as an example of the external power source.
With reference to
In
The output terminal of the DC power source, i.e., OUT, is connected to input terminal of the charging circuit 302.
In
When the current supplied from external side of the output terminal of the DC power source, i.e., OUT, is 110 volt or 220 volt alternating current, the present converting circuit can be used to convert the 110 volt or 220 volt alternating current into 5 volt direct current, and then the 5 volt direct current can be supplied to the charging circuit.
With reference to
In the charging circuit according to embodiments of the invention, charging chip CN3062 is preferably used. Charging chip CN3062 is of charger circuit of constant current or constant voltage. Charging chip CN3062 can charge a single chargeable lithium battery in a manner of constant current or constant voltage.
The charging chip CN3062 is provided internally with a power transistor and meets the technical specifications of USB.
As shown in
Terminal BATOUT is output terminal of the charging circuit. The terminal BATOUT can be directly connected to the chargeable battery and the control circuit, so as to supply power to the chargeable battery and the control circuit.
Of course, other chips or chip microprocessors can also be used for the charging circuit in present invention, provided that the charging requirements of the chargeable battery and the power supplying requirements of the control circuit according to the invention can be met.
USB interface and wall-mount adapter can also be used in the charging circuit simultaneously. Refer to
When both USB interface and wall-mount adapter are provided, the wall-mount adapter is preferably used by the charging chip CN3062.
In
In the temperature controller of the present invention, not only USB interface but also wall-mount adapter can be used for charging. When an alternating current power source serves as power source, a converting circuit in the temperature controller of the invention can convert the alternating current into direct current, for powering the charging circuit. Since the chargeable battery can be reused, cost is accordingly reduced. Moreover, severe environmental pollution is reduced due to avoidance of using alkaline batteries.
The embodiments described above are merely used to explain the principle of the present invention, which do not constitute any kind of restrictions to the present invention. Although the present invention has been disclosed with the above preferred embodiments, the invention is not intended to be limited thereto. For those skilled in the art, various variations and modifications which are made without departing from the spirit and the scope of the invention shall fall within the scope of the invention.
Number | Date | Country | Kind |
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200810116677.6 | Jul 2008 | CN | national |