WO2021052331A1

WO2021052331A1 - Small-sized refrigeration apparatus with heat recovery function

Info

Publication number: WO2021052331A1
Application number: PCT/CN2020/115366
Authority: WO
Inventors: 杜嵘
Original assignee: 杜嵘
Priority date: 2019-09-16
Filing date: 2020-09-15
Publication date: 2021-03-25
Also published as: CN210861712U

Abstract

The present utility model relates to the field of refrigeration and, in particular, to a small-sized refrigeration apparatus with a heat recovery function. In the embodiment of the present utility model, a plate-type heat exchanger is used to enable heat of a condensing agent of the small-sized refrigeration apparatus to be exchanged with that of low-temperature running water, so as to obtain high-temperature running water. Heat recovery is thus achieved, and hot water is obtained, such that the problem of existing refrigeration systems whereby heat energy is wasted during heat releasing is improved.

Description

A small refrigeration equipment with heat recovery function

Technical field

The utility model relates to the field of refrigeration, in particular to a small refrigeration equipment with a heat recovery function.

Background technique

At present, most of the cold sources of traditional refrigeration equipment are compression refrigeration units. This kind of traditional cold source consumes electric energy and outputs chilled water, and at the same time emits a considerable amount of waste heat, which is discharged outdoors.

Large-scale refrigeration systems generally use direct discharge or partial heat recovery. Part of the heat recovery usually only uses the steam heat from the compressor outlet. The steam heat generally accounts for about 15% of the total condensation heat, and the other condensation heat is taken away by the fan in the condenser.

Summary of the invention

The purpose of the utility model is to provide a small refrigeration equipment with heat recovery function, which improves the problem that heat energy is wasted when the existing refrigeration system releases heat, and some heat recovery equipment has limited heat recovery.

In order to solve the above problems, the present invention provides a small refrigeration equipment with heat recovery function. The small refrigeration equipment with heat recovery function includes a compressor, a water-cooled condenser, a liquid storage tank, a solenoid valve, a throttling device, and Evaporator;

The output end of the compressor is connected to the refrigerant input end of the water-cooled condenser, the refrigerant output end of the water-cooled condenser is connected to the input end of the liquid storage tank, and the output end of the liquid storage tank is connected to the electromagnetic The input end of the valve, the output end of the solenoid valve is connected to the input end of the throttling device, the output end of the throttling device is connected to the input end of the evaporator, and the output end of the evaporator is connected to the compressor The input terminal of the machine;

The small-scale refrigeration equipment with heat recovery function further includes a pressure-type water-preparation valve, the pressure-type water-preparation valve is connected to the refrigerant channel of the water-cooled condenser, and the water input end of the pressure-type water-preparation valve is connected to the water inlet The water output end is connected to the water input end of the water-cooled condenser, and the water output end of the water-cooled condenser is connected to the water outlet.

Further, the small refrigeration equipment with heat recovery function is also connected to a water system unit, the water system unit is connected to the water output end of the water-cooled condenser, the water system unit includes a warm water reservoir, the The water output end of the water-cooled condenser is connected to the warm water reservoir, and the warm water reservoir is connected to the hot water user end.

Further, the warm water reservoir is connected to one or more auxiliary heating devices in parallel.

Further, the small refrigeration equipment with heat recovery function includes a plurality of water-cooled condensers connected in parallel.

In the embodiment of the present invention, a plate heat exchanger is used to exchange heat between the condensate heat of the small refrigeration equipment and the tap water with a lower temperature, thereby obtaining tap water with a higher temperature. In this way, heat recovery is realized and hot water is obtained, thereby improving the problem of wasting heat energy when the existing refrigeration system releases heat.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of a small refrigeration equipment with heat recovery function provided by the present invention.

detailed description

Hereinafter, the present utility model will be further described in detail through specific embodiments in conjunction with the accompanying drawings.

Referring to Figure 1, the present utility model provides a small refrigeration equipment with heat recovery function. The small refrigeration equipment with heat recovery function includes a compressor 10, a water-cooled condenser 11, a liquid storage tank 13, a solenoid valve 14, and a throttle The device 15 and the evaporator 16.

The output end of the compressor 10 is connected to the refrigerant input end of the water-cooled condenser 11, and the refrigerant output end of the water-cooled condenser 11 is connected to the input end of the liquid storage tank 13, and the output end of the liquid storage tank 13 13 is connected to the input end of the solenoid valve 14, the output end of the solenoid valve 14 is connected to the input end of the throttle device 15, the output end of the throttle device 15 is connected to the input end of the evaporator 16, so The output end of the evaporator 16 is connected to the input end of the compressor 10. In this way, a circulation of the condensing agent is formed.

The small refrigeration equipment with heat recovery function also includes a pressure-type water production valve 17, which communicates with the refrigerant channel of the water-cooled condenser 11 (which can be connected to the input of the water-cooled condenser 11). End), the water input end of the pressure type water control valve 17 is connected to the water input end, the water output end is connected to the water input end of the water-cooled condenser 11, and the water output end of the water-cooled condenser 11 is connected to the water outlet.

The evaporator 16, the water-cooled condenser 11, the compressor 10, and the throttling device 15 in the refrigeration equipment are the four essential parts in the refrigeration system. Among them, the evaporator 16 is a device for conveying cold energy. The refrigerant absorbs the heat of the object to be cooled to achieve cooling. The compressor 10 is the heart, and plays the role of inhaling, compressing, and transporting refrigerant vapor. The water-cooled condenser 11 is a device that emits heat, and transfers the heat absorbed in the evaporator 16 together with the heat converted by the work of the compressor 10 to the cooling medium (water) to take away.

The throttling device 15 has a throttling and pressure reduction effect on the refrigerant, simultaneously controls and regulates the amount of refrigerant (liquid) flowing into the evaporator 16, and divides the system into two parts, a high-pressure side and a low-pressure side.

For the water system, the tap water is controlled by the pressure type water valve 17 and the water is heated by the water-cooled condenser 11 in the process of condensing the refrigerant. We collect the hot water, and then the water pump delivers the hot water to Water heater or water point. Thus, the energy consumption caused by heating the water is reduced.

As an embodiment of the present invention, the pressure-type water control valve 17 may adopt a condensing pressure regulating water valve (mainly used in small refrigeration equipment). The condensing pressure regulating valve is installed on the cooling water pipe of the water-cooled condenser 11 (water inlet). Adjust the flow of cooling water according to changes in condensing pressure. When the discharge pressure (refrigerant pressure) of the compressor 10 increases, the pressure-type water valve 17 adjusts the valve to automatically open, so that more cooling water enters the water-cooled condenser 11 to accelerate the condensation speed. Conversely, when the discharge pressure of the compressor 10 (the pressure of the refrigerant) drops, the pressure-type water control valve 17 is automatically closed to reduce the supply of cooling water. Depending on the medium of the condensing agent (refrigerant), keep the condensing pressure within a specific range.

As an embodiment of the present invention, the water-cooled condenser 11 adopts a plate heat exchanger for heat exchange. The plate heat exchanger is provided with a condenser input end, a condenser output end, a water input end and a water output end.

The condensate output from the compressor 10 is input through the condensate input end of the plate heat exchanger, and the tap water output from the pressure type water production valve 17 is input through the water input end of the plate heat exchanger. The lower temperature water is exchanged with the condensing agent to become higher temperature water; the higher temperature condensing agent becomes the lower temperature condensing agent through the heat exchange with the water.

As an embodiment of the present invention, the small refrigeration equipment with heat recovery function is also connected with a water system unit, and the water system unit is connected to the water output end of the water-cooled condenser 11. The water system unit includes a warm water reservoir, the water output end of the water-cooled condenser 11 is connected to the warm water reservoir, and the warm water reservoir is connected to a hot water user end.

As an embodiment of the present invention, the warm water reservoir is connected to one or more auxiliary heating devices in parallel.

As an embodiment of the present invention, the small refrigeration equipment with heat recovery function includes a plurality of water-cooled condensers connected in parallel. According to needs, single unit (single water-cooled condenser) or multiple units (multiple water-cooled condensers connected in parallel) work for total heat recovery.

The main function of the unit is refrigeration. While ensuring refrigeration, it converts the released heat into thermal energy and effectively utilizes the discharged heat, thus achieving the purpose of heating water. In a macroscopic sense, it reduces the "heat island effect" on the earth. From the energy point of view, the limited energy is used to the extreme.

The above descriptions are only preferred embodiments of the present utility model, and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

A small refrigeration equipment with heat recovery function, characterized in that the small refrigeration equipment with heat recovery function includes a compressor, a water-cooled condenser, a liquid storage tank, a solenoid valve, a throttling device, and an evaporator;

The output end of the compressor is connected to the refrigerant input end of the water-cooled condenser, the refrigerant output end of the water-cooled condenser is connected to the input end of the liquid storage tank, and the output end of the liquid storage tank is connected to the electromagnetic The input end of the valve, the output end of the solenoid valve is connected to the input end of the throttling device, the output end of the throttling device is connected to the input end of the evaporator, and the output end of the evaporator is connected to the compressor The input terminal of the machine;

The small-scale refrigeration equipment with heat recovery function further includes a pressure-type water-preparation valve, the pressure-type water-preparation valve is connected to the refrigerant channel of the water-cooled condenser, and the water input end of the pressure-type water-preparation valve is connected to the water inlet The water output end is connected to the water input end of the water-cooled condenser, and the water output end of the water-cooled condenser is connected to the water outlet.
The small refrigeration equipment with heat recovery function according to claim 1, wherein the small refrigeration equipment with heat recovery function is also connected to a water system unit, and the water system unit is connected to the water-cooled condenser. The water output end, the water system unit includes a warm water reservoir, the water output end of the water-cooled condenser is connected to the warm water reservoir, and the warm water reservoir is connected to a hot water user end.
The small refrigeration equipment with heat recovery function according to claim 2, wherein the warm water reservoir is connected in parallel with one or more auxiliary heating devices.
The small refrigeration equipment with heat recovery function according to claim 1, wherein the small refrigeration equipment with heat recovery function comprises a plurality of water-cooled condensers connected in parallel.
The small refrigeration equipment with heat recovery function according to claim 1, wherein the water-cooled condenser adopts a plate heat exchanger.