Temperature control system for heat pump fan coil waterway

Abstract

The utility model relates to a temperature control system for a heat pump fan coil waterway. Comprising a fan, an air pipe and a coil pipe, the system further comprises a water quantity server and a control chip, the control chip is in signal connection with the water quantity server through a data line, and the water quantity server is connected to the inlet end or the outlet end of the coil pipe in series. The opening degree of the water quantity server is controlled through the control chip, so that the flow in the coil pipe is controlled. The heat pump system is particularly suitable for a small heat pump system or a household scene, the heat pump main machine conducts refrigeration and heating according to the requirements of a user, meanwhile, according to the indoor temperature requirement set by the user, on the basis that the air speed is adjusted by all the fan coils, flow adjustment of the fan coil water channels is added, and the heat pump main machine conducts refrigeration and heating. The air volume and the water volume of each fan coil are controlled, the temperature control precision is improved, the heat pump main machine always works under the minimum necessary energy consumption, and unnecessary energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the field of air supply systems, in particular to a temperature control system for a water circuit of a heat pump fan coil. Background Art

[0002] At present, the heat pump system can not only heat, but also cool, realizing dual-purpose heating and cooling; in the heat pump system, the "fan" and "coil" together constitute the core part of the heat pump system, and their cooperation and coordination are the key to realizing the heating and cooling functions:

[0003] The "fan" is the air circulation device in the heat pump system, responsible for sucking air into the system and passing it through the heat exchanger for heating or cooling, and then sending the treated air back into the room;

[0004] The "coil" is the heat exchanger in the heat pump system, responsible for transferring heat from the refrigerant to the air or water; in heating mode, the coil acts as a condenser, releasing heat from the refrigerant or water to the air, causing them to heat up; in cooling mode, the coil acts as an evaporator, absorbing heat from the air and cooling it down.

[0005] In some simple or comprehensive heat pump systems, the flow rate and flow velocity of the refrigerant in the coil are adjustable, so the cooling or heating speed of the entire heat pump system can only be adjusted by adjusting the speed of the fan. In this way, for these simple or comprehensive heat pump systems, the accuracy of room temperature regulation is poor and excess energy consumption will be generated. Utility Model Content

[0006] The purpose of the utility model is to overcome the above defects and propose a coil with flow control function, so as to improve the coordination between the fan and the coil, so as to achieve the purpose of more accurately adjusting the room temperature and reducing the energy consumption of the heat pump system.

[0007] In order to achieve the above object, the utility model is achieved as follows:

[0008] A temperature control system for a heat pump fan coil water circuit comprises a fan, an air duct and a coil, wherein the fan is arranged at the air inlet end of the air duct, and the coil is also arranged in the air duct, and the airflow blown into the air duct by the fan passes through the coil to achieve heat exchange and then flows out from the air outlet section of the air duct, the coil is filled with refrigerant, and further comprises a water volume server and a control chip, wherein the control chip and the water volume server are connected by signals via a data line, and the water volume server is connected in series at the inlet end or the outlet end of the coil; the opening of the water volume server is controlled by the control chip, thereby controlling the flow in the coil.

[0009] The temperature control system for the water circuit of the heat pump fan coil unit proposed by the present utility model provides two control objectives: the fan speed and the coil flow rate. Thus, when the target temperature is close to or gradually approaching the set temperature, while controlling the fan to reduce its speed, it is possible to cut down the excessive water flow rate in each fan coil unit according to the actual working conditions, so that the power of the heat pump main unit is always at the lowest necessary level; thereby reducing the energy consumption of the heat pump main unit while ensuring indoor comfort.

[0010] Further, for the temperature control system for the water circuit of the heat pump fan coil unit, for the convenience of intuitive use, it further includes a human-machine interaction panel. The human-machine interaction panel is connected to the control chip. The target temperature is input to the control chip through the human-machine interaction panel. The control chip converts the received target temperature into an opening signal of the water volume servo and transmits the opening signal to the water volume servo, and changes the flow rate in the coil through the opening of the water volume servo.

[0011] Further, for the temperature control system for the water circuit of the heat pump fan coil unit proposed by the present utility model, since it only needs to set water volume servos at the water inlet end and the water outlet end of the coil, and the rest of the control chip, human-machine interaction panel, etc. can be integrated into the existing control system. Therefore, it has the advantages of being easy to implement and arrange. Thus, in addition to the heat pump systems in large industrial scenarios, it is also suitable for household scenarios. When used in small household scenarios, the liquid filled in the coil can replace the industrial refrigerant with tap water or pure water.

[0012] Further, when the temperature control system for the water circuit of the heat pump fan coil unit proposed by the present utility model is applied to household scenarios, inputting the target temperature to the control chip through the human-machine interaction panel refers to the target indoor temperature. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the temperature control system for the water circuit of the heat pump fan coil unit proposed by the present utility model. Detailed Embodiments

[0014] Next, the technical solutions of the embodiments of the present application will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope claimed by the present application.

[0015] A temperature control system for an indoor heat pump system, comprising a fan, an air duct and a coil. The fan is arranged at the air inlet end of the air duct, and a coil is also arranged in the air duct. The air flow blown by the fan into the air duct passes through the coil for heat exchange and then flows out from the air outlet section of the air duct. Water is filled in the coil. The system further comprises a water volume servo and a control chip. The control chip is signal-connected to the water volume servo through a data line. The water volume servo is connected in series at the inlet end or the outlet end of the coil. By controlling the opening degree of the water volume servo by the control chip, the flow rate in the coil can be controlled.

[0016] The above temperature control system further comprises a human-machine interaction panel, which is connected to the control chip. The target indoor temperature is input to the control chip through the human-machine interaction panel. The control chip converts the received target indoor temperature into an opening degree signal of the water volume servo according to a preset temperature-opening degree conversion program, and transmits the opening degree signal to the water volume servo, and changes the flow rate in the coil through the opening degree of the water volume servo.

[0017] In this way, when the target indoor temperature is set on the human-machine interaction panel, the control chip will feedback the set value and the current indoor temperature to the control chip in real time. The control chip calculates the minimum necessary fan speed and water flow rate, that is, the opening degree of the water volume servo, according to the obtained feedback information, and sends an adjustment instruction to the servo motor of the water volume servo, so as to achieve accurate water flow control in addition to the air volume. Finally, when the target indoor temperature is close to or gradually approaching the set temperature, while controlling the fan to reduce speed, it is possible to cut down the excess water flow rate in each fan coil according to the actual working conditions, so that the power of the heat pump main unit is always at the minimum necessary; thus, while ensuring the indoor comfort, the energy consumption of the heat pump main unit is also reduced.

[0018] In the above embodiment, only water volume servos need to be arranged at the water inlet end and the water outlet end of the coil, and the rest of the control chip, human-machine interaction panel, etc. can be integrated into the existing control system, such as the control system of a household gas water heater or a heating furnace.

[0019] It can be seen from this embodiment that the present invention provides a temperature control system for the water circuit of a heat pump fan coil, which is particularly applicable to a small heat pump system or a household scenario. While the heat pump main unit cools and heats according to the user's needs, based on the adjustment of the wind speed of each fan coil according to the indoor temperature requirements set by the user, the flow rate adjustment of the water path of the fan coil is additionally performed, realizing the dual control of the air volume and water volume of each fan coil, improving the temperature control accuracy, and further enabling the heat pump main unit to always work at the minimum necessary energy consumption, avoiding unnecessary energy waste.

[0020] The above are only the embodiments provided by this application and are not used to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A temperature control system for the water circuit of a heat pump fan coil unit, comprising a fan, an air duct and a coil. The fan is arranged at the air inlet end of the air duct, and a coil is also arranged in the air duct. The air flow blown by the fan into the air duct passes through the coil for heat exchange and then flows out from the air outlet section of the air duct. The coil is filled with a refrigerant, and it is characterized in that: It further includes a water volume servo and a control chip. The control chip is signal-connected to the water volume servo through a data line. The water volume servo is connected in series at the inlet end or the outlet end of the coil pipe. The opening degree of the water volume servo is controlled by the control chip, so as to control the flow rate in the coil pipe.

2. The temperature control system for the water circuit of a heat pump fan coil unit according to claim 1, characterized in that: It further includes a human-machine interaction panel. The human-machine interaction panel is connected to the control chip. A target temperature is input to the control chip through the human-machine interaction panel. The control chip converts the received target temperature into an opening degree signal of the water volume servo, transmits the opening degree signal to the water volume servo, and changes the flow rate in the coil pipe through the opening degree of the water volume servo.

3. The temperature control system for the water circuit of a heat pump fan coil unit according to claim 1 or 2, characterized in that: The liquid filled in the coil pipe is a refrigerant or water.

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