Cold and hot water dispenser

Abstract

The utility model discloses a cold and hot water dispenser which comprises a main controller, a hot water system and an ice water system, the hot water system is provided with a heating module, the ice water system is provided with a refrigerating module, the heating module and the refrigerating module are respectively connected with a power supply through a heating switch and a refrigerating switch, and the main controller controls the heating switch and the refrigerating switch. The main controller is connected with the heating module and the refrigeration module, so as to control the operation of the heating module and the refrigeration module, the refrigeration module comprises a compressor, the refrigeration module is also provided with a variable frequency controller, the main controller controls a refrigeration switch so as to control the operation of the variable frequency controller, and the variable frequency controller controls the operation of the compressor. The constant-speed intermittent work of the water dispenser is changed into the speed-adjustable continuous work of the compressor, the refrigeration speed is high, the water temperature is constant, the energy consumption is low, the efficiency is high, the frequency conversion controller is used for adjustment, resonance points can be effectively shielded, frequent starting is avoided, and the work noise is reduced.

Description

Technical Field

[0001] The utility model relates to a water dispenser, in particular to a cold and hot water dispenser. Background Art

[0002] In addition to providing hot water and cold water at room temperature, many existing water dispensers also have the function of providing ice water at a lower temperature. Currently, conventional water dispensers with ice water function use the following methods for refrigeration: semiconductor refrigeration and compressor refrigeration.

[0003] The working principle of semiconductor refrigeration is to use semiconductor refrigeration sheet, which is composed of two ceramic sheets, with N-type and P-type semiconductor materials (bismuth telluride) in between. This semiconductor element is connected in series in the circuit. One piece of N-type semiconductor material and one piece of P-type semiconductor material are connected to form an electric couple. When the direct current is connected, energy transfer can be generated. The current flows from the N-type element to the joint of the P-type element to absorb heat and become the cold end. The current flows from the P-type element to the joint of the N-type element to release heat and become the hot end. The amount of heat absorption and heat release is determined by the size of the current and the number of element pairs of semiconductor materials N and P. The inside of the refrigeration sheet is a thermopile composed of hundreds of pairs of electric couples to achieve the effect of enhancing refrigeration. The disadvantages of semiconductor refrigeration are slow cooling, low cooling capacity, and high cooling temperature.

[0004] The working principle of compressor refrigeration is to control the start and stop of the compressor by switching on and off. When the compressor in the water dispenser is started, it will absorb the refrigerant that has absorbed heat and vaporized in the evaporator, and then compress it into a high-temperature and high-pressure gas and send it to the condenser. After that, it will dissipate heat to the outside air through the condenser and condense into a high-pressure liquid. After passing through the capillary of the water dispenser, it will be throttled and decompressed into the evaporator, absorbing the heat of the cold tank for cooling. This refrigeration method increases the refrigeration capacity, but the compressor refrigeration water dispensers currently used have the following disadvantages: 1. The refrigeration speed cannot be adjusted and the refrigeration speed is slow; 2. The water temperature is unstable and fluctuates; 3. It is noisy, consumes more electricity, and has low energy efficiency. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a hot and cold water dispenser with fast refrigeration speed, low noise, low power consumption and stable water temperature.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a hot and cold water dispenser, including a main controller, a hot water system and an ice water system, the hot water system is provided with a heating module, the ice water system is provided with a refrigeration module, the heating module and the refrigeration module are respectively connected to a power supply through a heating switch and a refrigeration switch, the main controller controls the heating switch and the refrigeration switch, thereby controlling the operation of the heating module and the refrigeration module, the refrigeration module includes a compressor, and the refrigeration module is also provided with a frequency conversion controller, the main controller controls the refrigeration switch to control the operation of the frequency conversion controller, and the frequency conversion controller controls the operation of the compressor.

[0007] Compared with the prior art, the advantage of the utility model is that a frequency conversion controller is set to adjust the speed of the refrigeration compressor, so that the water dispenser changes from fixed-speed intermittent operation to continuous operation with adjustable compressor speed, achieving fast refrigeration speed, constant water temperature, low energy consumption and high efficiency. Through the adjustment of the frequency conversion controller, the resonance point can be effectively shielded, frequent startup will not be achieved, and the working noise can be reduced.

[0008] Preferably, the compressor is a variable frequency compressor. The variable frequency compressor will run at a higher speed when starting the refrigeration, and will maintain a lower speed more often after the temperature of the water dispenser stabilizes, which is relatively energy-saving. Tests have shown that the energy saving can reach about 30%. Moreover, a variable frequency compressor can be compatible with more water dispenser models and reduce the number of compressor models.

[0009] Preferably, the refrigeration switch is a relay, a control line of the relay is connected to the main controller, and the main controller outputs a first control signal for controlling the on and off of the relay.

[0010] Preferably, the heating switch is a bidirectional thyristor, a control line of the bidirectional thyristor is connected to the main controller, and the main controller outputs a second control signal for controlling the on and off of the bidirectional thyristor.

[0011] Preferably, the main controller is provided with a zero-crossing detection circuit. When power is input, the zero-crossing detection circuit detects that the voltage passes through the zero point of the sine wave, and outputs a pulse signal to the main controller so that the main controller outputs the first control signal and / or the second control signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the circuit part of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] Embodiment 1: A hot and cold water dispenser, including a hot water system and an ice water system, the circuit part of which is as follows Figure 1 As shown, it includes a main controller MCU, a heating module 1 for heating a hot water system and a refrigeration module 2 for refrigerating an ice water system, the refrigeration module 2 includes a relay 21 as a refrigeration switch, a frequency conversion controller 22 and a frequency conversion compressor 23 (the frequency conversion compressor is produced by Hangzhou Qianjiang Refrigeration Compressor Group Co., Ltd., model: VFZ60Y, and various other models can also be selected), the heating module 1 includes a bidirectional thyristor 11 as a heating switch and a heating tube 12, the main controller MCU has a first control signal output terminal M1 and a second control signal output terminal M2, the first control signal output terminal M1 is connected to the control end of the relay 21, the second control signal output terminal M2 is connected to the control end of the bidirectional thyristor 11, and the main controller MCU is provided with a zero crossing detection circuit 3 , when the power is input, the zero-crossing detection circuit 3 detects that the voltage passes through the zero point of the sine wave, and outputs a pulse signal to the main controller MCU. At this time, the main controller MCU outputs the second control signal to the control end of the bidirectional thyristor 11 through the second control signal output terminal M2, and adjusts the power of the heating tube 12 by changing the on and off time of the bidirectional thyristor in each control cycle; at the same time, the main controller MCU outputs the first control signal to the relay 21 through the first control signal output terminal M1, thereby turning on the relay 21, and the frequency conversion controller 22 runs to start the frequency conversion compressor 23. The frequency conversion controller 22 will start working according to the set working logic. The frequency conversion compressor 23 runs at a higher speed when starting the refrigeration, and maintains a lower speed when the temperature of the ice water system of the water dispenser is stable. When the power is off, the heating circuit will be directly cut off, and the frequency conversion controller 22, due to its shutdown protection and startup protection functions, will make the frequency conversion compressor 23 continue to run for 30 seconds before shutting down, and it will take another 5 minutes after shutting down to start again.

Claims

1. A hot and cold water dispenser, comprising a main controller, a hot water system and an ice water system, wherein the hot water system is provided with a heating module, and the ice water system is provided with a refrigeration module, wherein the heating module and the refrigeration module are respectively connected to a power source through a heating switch and a refrigeration switch, wherein the main controller controls the heating switch and the refrigeration switch, thereby controlling the operation of the heating module and the refrigeration module, wherein the refrigeration module comprises a compressor, characterized in that: The refrigeration module is provided with a frequency conversion controller, the main controller controls the refrigeration switch to control the operation of the frequency conversion controller, and the frequency conversion controller controls the operation of the compressor.

2. A hot and cold water dispenser as claimed in claim 1, characterized in that: The compressor is a variable frequency compressor.

3. A hot and cold water dispenser as claimed in claim 2, characterized in that: The refrigeration switch is a relay, a control line of the relay is connected to the main controller, and the main controller outputs a first control signal for controlling the on and off of the relay.

4. A hot and cold water dispenser as claimed in claim 3, characterized in that: The heating switch is a bidirectional thyristor, a control line of the bidirectional thyristor is connected to the main controller, and the main controller outputs a second control signal for controlling the on and off of the bidirectional thyristor.

5. A hot and cold water dispenser as claimed in claim 4, characterized in that: The main controller is provided with a zero-crossing detection circuit. When power is input, the zero-crossing detection circuit detects that the voltage passes through the zero point of the sine wave, and outputs a pulse signal to the main controller so that the main controller outputs a first control signal and / or a second control signal.

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