Abstract: A multi-parallel carbon dioxide heat pump control method based on target load control, wherein the multi-parallel carbon dioxide heat pump comprises a carbon dioxide circulation loop, a heat source pipeline and a hot water pipeline, and the control method comprises: adjusting the opening degree of an electronic expansion valve (3) according to the temperature of an inlet of the hot water pipeline, the temperature of an outlet of the hot water pipeline, the flow in the hot water pipeline and a target outlet temperature set by a user, such that the steady-state change of system pressure can be realized by adjusting the electronic expansion valve (3) on the basis of the fluctuation of parameters such as user side temperature and flow, thus a target outlet temperature change curve is rapidly and stably converged to a target value, and the outlet temperature can be rapidly stabilized.

Abstract: A carbon dioxide overlapping type heating system and a control method therefor, in which the heating system includes a low-temperature-stage loop, high-temperature-stage loop and a heating loop, in which a temperature-stage compressor (3) and a high-temperature-stage compressor (7) are both variable-frequency compressors; and a water pump (10) is a variable-frequency water pump.

Abstract: A hot water system with transcritical carbon dioxide single-stage or double-stage compression and a control method therefor is provided. The hot water system includes a first-stage compressor, a first heat exchanger for exchanging heat with cooling water on user side, a second-stage compressor, a second heat exchanger for exchanging heat with the cooling water on user side, a third heat exchanger for exchanging heat between a liquid phase refrigerant and a gas phase refrigerant, an expansion valve, a fourth heat exchanger for exchanging heat with ambient air, a buffer water tank, a first proportional valve, a second proportional valve, a third proportional valve, a fourth proportional valve, a defrosting valve, and a refrigerant circuit bypass valve. The hot water system can switch between the single-stage compression ad the double-stage compression in high-temperature and low-temperature weather, ensuring that the system has good heating capacity and energy efficiency ratio.

Abstract: An oral health management system based on artificial intelligence image recognition to adjust the electric toothbrush includes an intelligent electric toothbrush and a server. The intelligent electric toothbrush has an image acquisition unit, an image judgment unit, a first communication unit, a positioning unit, a main control unit, a motor drive unit and a voice playback unit. The server has a recognition unit, a second communication unit and a parameter determination unit. The parameter determination unit is set on the intelligent electric toothbrush or server to determine the corresponding teeth cleaning parameters for different oral areas based on the recognition results. The system obtains a user's oral image and performs recognition and analysis, and then selects tooth cleaning parameters based on the recognition and analysis results to provide targeted oral cleaning services for the user.

Abstract: Disclosed is a carbon dioxide heat pump evaporator, comprising side evaporators having defrosting water flow channels formed thereon, an evaporator tray which is arranged at the bottoms of the side evaporators and is used for supporting the side evaporators, and a defrosting drainage system, wherein the defrosting drainage system comprises a plurality of defrosting electric heating tubes inserted into the side evaporators, water receiving gutters which are connected to the defrosting water flow channels, gutter electric heating mechanisms for heating the water receiving gutters, and drainage pipes which are connected to the water receiving gutters and are provided with conduit electric heating tracing bands; and the evaporator tray, the water receiving gutters and the drainage pipes are sequentially arranged from top to bottom.

Abstract: The present disclosure includes an apparatus, including a frame having a front surface and a back surface. In some examples, the frame is configured to hold a card at the front surface. According to some examples, the frame is configured to release the card via a force from the back surface. The apparatus may include a slot configured to receive the force from the back surface during the release of the card.

Abstract: The present disclosure includes an apparatus, comprising a body. In some examples, the apparatus includes a gate rotatably coupled to the body, the gate including an arm, a middle portion, and a bend. According to some examples, the gate is configured to rest in an initial position. The gate may be configured to move from the initial position in response to a first force. In some examples, the arm moves a greater distance than the middle portion when the gate is moved from the initial position. According to some examples, a torque occurs in the bend when the gate is moved from the initial position.

Abstract: The present disclosure relates to a PCR detection kit for rapidly identifying Salmonella of specific serotypes. The kit includes primers for detecting tcpS gene, the primers for detecting the tcpS gene including a forward primer having a nucleotide sequence as set forth in SEQ ID NO. 1 and a reverse primer having a nucleotide sequence as set forth in SEQ ID NO. 2. The kit can identify Salmonella of enteritidis, pullorum/gallinarum, and dublin serotypes rapidly and in a high throughput, which can be used as an auxiliary method for the conventional serotyping of Salmonella.

Abstract: A constant-temperature water supply system employing a carbon dioxide heat pump includes a primary side loop, a secondary side water supply pipeline, a carbon dioxide heat pump water heater in the primary side loop, and a heat exchanger between the primary side loop and the secondary side water supply pipeline; the temperature of return water is detected and the temperature of a return water tank is detected, so even if the temperature of return water flowing out of a first heat exchange tube fluctuates, the return water can be input at a position in the return water tank having a close temperature, such that water in the return water tank is always in a stably layered state, and therefore allows for constant-temperature water supply.

Abstract: Disclosed are a carbon dioxide overlapping type heating system and a control method therefor. The heating system comprises a low-temperature stage loop, a high-temperature stage loop and a heat supply loop, wherein a low-temperature stage compressor (3) and a high-temperature stage compressor (7) are both variable-frequency compressors; and a water pump (10) is a variable-frequency water pump.

Abstract: A multi-parallel carbon dioxide heat pump control method based on target load control, wherein the multi-parallel carbon dioxide heat pump comprises a carbon dioxide circulation loop, a heat source pipeline and a hot water pipeline, and the control method comprises: adjusting the opening degree of an electronic expansion valve (3) according to the temperature of an inlet of the hot water pipeline, the temperature of an outlet of the hot water pipeline, the flow in the hot water pipeline and a target outlet temperature set by a user, such that the steady-state change of system pressure can be realized by adjusting the electronic expansion valve (3) on the basis of the fluctuation of parameters such as user side temperature and flow, thus a target outlet temperature change curve is rapidly and stably converged to a target value, and the outlet temperature can be rapidly stabilized.

Abstract: The present disclosure relates to a PCR detection kit for rapidly identifying Salmonella of specific serotypes. The kit includes primers for detecting tcpS gene, the primers for detecting the tcpS gene including a forward primer having a nucleotide sequence as set forth in SEQ ID NO. 1 and a reverse primer having a nucleotide sequence as set forth in SEQ ID NO. 2. The kit can identify Salmonella of enteritidis, pullorum/gallinarum, and dublin serotypes rapidly and in a high throughput, which can be used as an auxiliary method for the conventional serotyping of Salmonella.

Abstract: A watermark adjustment method and a watermark adjustment device are provided. The method includes determining whether a user clicks on a watermark preview interface in a predetermined manner; when it is determined that the user clicks on the watermark preview interface in the predetermined manner, generating a text box control according to a watermark pattern that is currently displayed to activate a watermark preview editing status; displaying the watermark pattern on the text box control; determining a text box display parameter according to a user setting for the text box control; and when the watermark preview editing status is ended, adjusting the watermark pattern according to the text box display parameter and displaying the adjusted watermark pattern in the watermark preview interface.