Refrigerating unit operating in low-temperature environment
By adding a heating element to the condenser and combining it with a silicon controlled rectifier (SCR) controller and a variable frequency fan, the problem of the refrigeration unit being unable to start in low-temperature environments was solved, and the normal start-up and operation of the refrigeration unit was achieved.
Patent Information
- Application Number
- CN202423250785.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing refrigeration units cannot start and operate normally in low-temperature environments, and the compressor cannot start due to excessively low pressure.
A heating element is installed on the condenser, and the heating power is controlled by a silicon controlled rectifier (SCR) controller. Combined with a variable frequency fan, electric louvers, and temperature sensors, automatic detection and control are achieved to ensure the normal start-up and operation of the refrigeration unit in low-temperature environments.
The heating element and automatic control system maintain the normal start-up and operating pressure of the refrigeration unit, ensuring that the refrigeration unit can start and operate normally in low-temperature environments.
Smart Images
Figure CN223610438U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of refrigeration equipment, specifically a refrigerating unit running in low temperature environment. BACKGROUND
[0002] The refrigerating unit is also called freezer, refrigerating machine, cooling machine, etc., and is a refrigeration equipment unit, mainly including compressor, evaporator, condenser and expansion valve four parts, and is used for realizing refrigeration and heating effect of the unit. The working principle of the refrigerating unit is mainly based on refrigeration cycle, and the refrigeration effect is realized through four basic processes of compression, condensation, throttling and evaporation. In the refrigeration cycle, the refrigerant is first evaporated in the evaporator, absorbs the heat of the cooled object, and then is compressed into high-temperature and high-pressure gas by the compressor. Then, the high-temperature and high-pressure gas releases heat in the condenser and condenses into liquid. The liquid refrigerant is reduced in pressure through the throttling device and then evaporates in the evaporator again to absorb more heat, so as to complete a refrigeration cycle.
[0003] The split type refrigeration equipment includes cold storage, test box, etc., and since the split refrigerating unit is too low in pressure in the outdoor low temperature environment, the compressor cannot be started and normally operated.
[0004] How to design a refrigerating unit running in low temperature environment, solve the above problems and deficiencies existing in the prior art, for different low temperature outdoor environment, can maintain the normal starting pressure and operating pressure of the refrigerating unit, make the refrigerating unit normal operation, this is the technical problem to be solved in the field. UTILITY MODEL CONTENTS
[0005] The utility model provides a refrigerating unit running in low temperature environment for solving the above problems existing in the prior art, for different low temperature outdoor environment, can maintain the normal starting pressure and operating pressure of the refrigerating unit, make the refrigerating unit normal operation.
[0006] The utility model aims at realizing the following technical scheme:
[0007] The utility model relates to a refrigerating unit running in low temperature environment, including controller, case, condensing fan setting in the top of case, air inlet and top air outlet setting in the lateral wall of case, the refrigeration circuit including compressor, condenser and liquid storage tank setting in the case, its characterized in that, the condenser is added heating pipe, the heating pipe is connected with the controller through thyristor controller, the controller controls the heating power size of the heating pipe through the thyristor controller, the air inlet and top air outlet of case are added electric louver respectively, the condensing fan adopts variable frequency fan, the case is provided with environmental temperature sensor, in -machine temperature sensor and pressure measuring device, the controller is connected with the thyristor controller, variable frequency fan, compressor, environmental temperature sensor, in -machine temperature sensor, pressure measuring device and the control end of each electric louver respectively, is used for controlling each part cooperation work to guarantee refrigerating unit normal starting pressure and operating pressure, realizes normal start and operation under low temperature environment.
[0008] The utility model further improves the above technical scheme: the pressure measuring device adopts pressure sensor, the condenser is connected with the inlet end of liquid storage tank, the low pressure interface of pressure sensor is connected with the low pressure end of compressor through low pressure hose intercommunication, the high pressure interface of pressure sensor is connected with the outlet end of liquid storage tank through high pressure hose intercommunication.
[0009] The utility model improves the above technical scheme: the heating pipe and condensing copper pipe of condenser cross distribution in the condenser inside, facilitate heating.
[0010] The utility model further improves the above technical scheme: the liquid storage tank and compressor set the lower part in the case, the condenser sets up the upper part in the case, and the air inlet sets up on two sides of the upper part of the case.
[0011] The utility model further improves the above technical scheme: the environmental temperature sensor sets up the outside of the case, and the in -machine temperature sensor sets up the inside of the case.
[0012] The utility model compared with prior art has the advantages and positive effects of:
[0013] 1, the utility model mainly is added heating pipe on condenser, the case top of condensing fan top, the air inlet and top air outlet of case are added electric louver respectively, and the controller can control heating pipe heating state, control electric louver's opening degree, maintain refrigerating unit normal starting pressure and operating pressure, make refrigerating unit normal operation to different low temperature outdoor environment,
[0014] 2. The utility model discloses a refrigerating machine group in low temperature environment, which comprises a controller, a machine case 6, a condensing fan 1 arranged on the top of the machine case 6, an inlet arranged on the side wall of the machine case 6, a refrigerating circuit arranged in the machine case 6, a heating pipe 3 arranged in the condenser 5, a discharge port electric louver 2 arranged on the top of the machine case 6, and an inlet electric louver 4 arranged on the inlet of the side wall of the machine case 6.
[0015] 3. The utility model discloses a structure design is reasonable, and operation and use are convenient. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a refrigerating machine group's structure schematic diagram of the utility model in low temperature environment;
[0017] Figure 2 It is a control principle block diagram of the utility model of a refrigerating machine group in low temperature environment.
[0018] In the drawing, the numbers are: 1, condensing fan; 2, discharge port electric louver; 3, heating pipe; 4, inlet electric louver; 5, condenser; 6, machine case. DETAILED DESCRIPTION
[0019] The utility model will be further explained in detail in connection with the drawings:
[0020] Referring to Figure 1 、 Figure 2 , the utility model discloses a refrigerating machine group in low temperature environment, which comprises a controller, a machine case 6, a condensing fan 1 arranged on the top of the machine case 6, an inlet arranged on the side wall of the machine case 6, a refrigerating circuit arranged in the machine case 6, a heating pipe 3 arranged in the condenser 5, a discharge port electric louver 2 arranged on the top of the machine case 6, and an inlet electric louver 4 arranged on the inlet of the side wall of the machine case 6. The condensing fan 1 is a variable frequency fan, an environmental temperature sensor, an internal temperature sensor and a pressure measuring device are arranged on the machine case 6, the controller is connected with the thyristor controller, the variable frequency fan, the compressor, the environmental temperature sensor, the internal temperature sensor, the pressure measuring device, the discharge port electric louver 2 and the inlet electric louver 4 respectively, and is used for controlling the cooperation of each part to ensure the normal starting pressure and operating pressure of the refrigerating machine group and realize normal starting and operation in low temperature environment.
[0021] Specifically, the pressure measuring device is a pressure sensor, the condenser is connected with the inlet end of the liquid storage tank, the low-pressure interface of the pressure sensor is connected with the low-pressure end of the compressor through a low-pressure hose, and the high-pressure interface of the pressure sensor is connected with the outlet end of the liquid storage tank through a high-pressure hose
[0022] Further, the heating pipe 3 and the condensing copper pipe of the condenser 5 are cross-distributed inside the condenser 5, which facilitates temperature rise.
[0023] Further, the compressor is arranged at the lower part of the cabinet 6, the condenser 5 is arranged at the upper part of the cabinet 6, and the air inlet and the air outlet are arranged on the two side walls and the top of the upper part of the cabinet 6 respectively.
[0024] Further, the ambient temperature sensor is arranged outside the cabinet 6, and the indoor temperature sensor is arranged inside the condenser 5.
[0025] The working principle of the utility model is as follows: when the ambient temperature is lower than a certain temperature, the pressure of the refrigeration equipment is low, and the refrigeration equipment cannot be started normally; when the refrigeration unit is started, the air outlet electric shutter 2, the air inlet electric shutter 4 and the condensing fan 1 need to be closed by the controller, and the heating pipe 3 works to increase the condensing pressure; the refrigeration equipment starts to start, the heating pipe 3 is closed, and the condenser 5 starts to rise in temperature due to the start of the refrigeration equipment in the refrigeration unit; the controller automatically controls the opening degree of the air outlet electric shutter 2 and the air inlet electric shutter 4 according to the ambient temperature, the temperature and the pressure in the refrigeration unit, so that the refrigeration unit is in a normal pressure state. If the temperature and the pressure in the refrigeration unit continue to rise, the controller controls the air outlet electric shutter 2 and the air inlet electric shutter 4 to be completely opened, and the condensing fan 1 starts to work according to the pressure in the refrigeration unit, so that the normal pressure of the refrigeration unit is maintained.
[0026] The above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.
Claims
1. A refrigeration unit operating in a low temperature environment, comprising a controller, a cabinet, a condensing fan arranged at the top of the cabinet, an air inlet arranged at the side wall of the cabinet and an air outlet arranged at the top of the cabinet, and a refrigeration circuit arranged in the cabinet, comprising a compressor, a condenser and a liquid accumulator, characterized in that, The heating pipe is connected with the controller through the silicon controlled rectifier, the controller controls the heating power of the heating pipe through the silicon controlled rectifier, the air inlet and the air outlet of the cabinet are respectively provided with electric shutters, the condenser fan is a variable frequency fan, the cabinet is provided with an environmental temperature sensor, an internal temperature sensor and a pressure measuring device, the controller is connected with the silicon controlled rectifier, the variable frequency fan, the compressor, the environmental temperature sensor, the internal temperature sensor, the pressure measuring device and the control ends of the electric shutters, so as to control the cooperation of each part, ensure the normal starting pressure and running pressure of the refrigeration unit, and realize the normal starting and running in a low temperature environment.
2. A chiller unit operating in a low temperature environment according to claim 1, characterized in that, The pressure measuring device is a pressure sensor, the condenser is connected with the inlet end of the liquid storage tank, the low pressure interface of the pressure sensor is connected with the low pressure end of the compressor through a low pressure hose, and the high pressure interface of the pressure sensor is connected with the outlet end of the liquid storage tank through a high pressure hose.
3. Refrigerant unit operating in a low temperature environment according to claim 1 or 2, characterized in that, The heating pipe and the condensing copper pipe of the condenser are cross-distributed in the condenser.
4. A chiller unit operating in a low temperature environment according to claim 1 or 2, characterized in that, The heating pipe and the condensing copper pipe of the condenser are cross-distributed in the condenser.
5. A chiller unit operating in a low temperature environment according to claim 1 or 2, characterized in that, The liquid storage tank and the compressor are arranged in the lower part of the cabinet, the condenser is arranged in the upper part of the cabinet, and the air inlets are arranged on the two sides of the upper part of the cabinet.
6. The chiller unit operating in a low temperature environment of claim 3, wherein, The liquid storage tank and the compressor are arranged in the lower part of the cabinet, the condenser is arranged in the upper part of the cabinet, and the air inlets are arranged on the two sides of the upper part of the cabinet.
7. The chiller unit operating in a low temperature environment of claim 4, wherein, The liquid storage tank and the compressor are arranged in the lower part of the cabinet, the condenser is arranged in the upper part of the cabinet, and the air inlets are arranged on the two sides of the upper part of the cabinet.
8. A chiller unit operating in a low temperature environment according to claim 1 or 2, characterized in that, The environmental temperature sensor is arranged on the outside of the cabinet, and the internal temperature sensor is arranged on the inside of the condenser.
9. The chiller unit operating in a low temperature environment of claim 6, wherein, The environmental temperature sensor is arranged on the outside of the cabinet, and the internal temperature sensor is arranged on the inside of the condenser.
10. The chiller unit operating in a low temperature environment of claim 7, wherein, The environmental temperature sensor is arranged on the outside of the cabinet, and the internal temperature sensor is arranged on the inside of the condenser.