Refrigerating system with variable refrigerant circulation dosage and refrigerating equipment

Abstract

The invention relates to the technical field of refrigerating systems, and provides a refrigerant circulation dose variable type refrigerating system which comprises a compressor, a first condenser, a first electromagnetic valve, a first throttler and an evaporator which are sequentially and circularly connected. An inlet of the first condenser is further connected with a temperature control valve, the temperature control valve is connected with a liquid storage device, and the liquid storage device is further connected with a first electromagnetic valve; the temperature control valve is configured to detect the temperature of the first condenser through the temperature sensing bulb and automatically adjust the circulation amount of the gaseous refrigerant from the air inlet nozzle to the air outlet nozzle according to the temperature. Therefore, the refrigerant which does not participate in the refrigeration cycle is temporarily stored through the liquid storage device. A temperature control valve is arranged to sense the temperature of the first condenser, and the opening degree is adjusted in real time. Therefore, under different operation working conditions, the circulation dosage of the refrigerant participating in the refrigeration cycle is adjusted in a self-adaptive mode, and the dosage is made to be matched with the operation working conditions. The refrigerating efficiency is improved, and the refrigerating effect is guaranteed. The invention further provides refrigeration equipment with the refrigeration system.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration systems, and in particular relates to a refrigeration system and refrigeration equipment with variable refrigerant flow dosage. Background Art

[0002] The working principle of the refrigerator refrigeration system is as follows: the compressor generates high-temperature and high-pressure gas refrigerant, which passes through the condenser for heat dissipation and cooling. After the refrigerant flows through the capillary tube for throttling and pressure reduction, it reaches the evaporator for evaporation and cooling, and then returns to the compressor suction port.

[0003] Most refrigerators currently use variable frequency compressors, and the refrigeration system is often only filled with a predetermined amount of refrigerant. Therefore, when the compressor is in different refrigeration conditions, the amount of refrigerant flowing in the refrigeration system cannot adapt to the preset refrigeration effect of each condition, resulting in the refrigerant circulating in the refrigeration system being short of liquid or over-liquid when the compressor is running in different conditions, causing the refrigerator to have problems such as insufficient heat exchange, low refrigeration efficiency, insufficient cooling capacity, overcooling, and large fluctuations in compartment temperature.

[0004] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention mainly provides a refrigeration system with variable refrigerant flow rate, which solves the technical problem that the refrigerant flow rate cannot be changed and adapted to different working conditions.

[0006] In order to solve the above problems, the present invention provides a refrigerant flow quantity variable refrigeration system, comprising a compressor, a first condenser, a first solenoid valve, a first throttle and an evaporator which are cyclically connected in sequence; the inlet of the first condenser is also connected to a temperature control valve, the temperature control valve is connected to a liquid reservoir, and the liquid reservoir is also connected to the first solenoid valve;

[0007] The temperature control valve comprises an air inlet nozzle, an air outlet nozzle and a temperature sensing package; the air inlet nozzle is connected to the first condenser, the air outlet nozzle is connected to the liquid reservoir; the temperature sensing package is attached to the first condenser;

[0008] The temperature control valve is configured to detect the temperature of the first condenser through a temperature sensing package, and automatically adjust the flow rate of the gaseous refrigerant from the air inlet nozzle to the air outlet nozzle according to the temperature.

[0009] According to the variable refrigerant flow rate refrigeration system of the present invention, the temperature control valve is a thermal expansion valve, comprising a valve body, a partition plate is provided in the valve body, and a vent is opened on the partition plate; the valve body is also provided with the air inlet nozzle and the air outlet nozzle respectively located on both sides of the partition plate; an expansion chamber is provided at one end of the valve body, and an elastic membrane is provided in the expansion chamber; the temperature sensing bag is provided at the end of the expansion chamber; a connecting rod is movably connected in the vent of the partition plate; one end of the connecting rod is connected to the elastic membrane, and the other end is connected to an adjusting block adapted to the vent; a spring is provided between the adjusting block and the inner wall of the valve body.

[0010] The refrigerant flow rate variable refrigeration system according to the present invention further comprises a second condenser, wherein the second condenser is connected to a second throttle, and the second throttle is also connected to the evaporator;

[0011] It also includes a second solenoid valve, which is connected to the temperature control valve, the second condenser and the liquid storage device respectively.

[0012] According to the refrigerant flow-through variable-dosage refrigeration system of the present invention, the liquid accumulator is also connected to the first throttle via a flow valve.

[0013] According to the refrigerant flow rate variable refrigeration system of the present invention, the first throttle and the second throttle are both capillary tubes or throttle valves.

[0014] According to the refrigerant flow rate variable refrigeration system of the present invention, the refrigeration system has multiple operating conditions, specifically:

[0015] High speed working condition: the first solenoid valve shuts off the pipeline connected to the reservoir;

[0016] Medium speed working condition: the first solenoid valve connects the pipeline connected to the reservoir; the temperature control valve is turned on;

[0017] Low speed working condition: the first solenoid valve connects the pipeline connected to the reservoir; the temperature control valve is closed;

[0018] The speed switching condition is used to switch the refrigeration system from a medium speed condition or a low speed condition to a high speed condition; the first solenoid valve turns on the pipeline connected to the liquid storage device; the temperature control valve turns on;

[0019] The speed switching condition is operated for a predetermined time and then switches to a high speed condition.

[0020] According to the refrigerant flow rate variable refrigeration system of the present invention, the refrigeration system has multiple operating conditions, specifically:

[0021] High speed working condition: both the first solenoid valve and the second solenoid valve shut off the pipeline connected to the reservoir;

[0022] Medium speed working condition: the first solenoid valve and the second solenoid valve both connect the pipeline connected to the reservoir; the temperature control valve is turned on;

[0023] Low speed working condition: the first solenoid valve and the second solenoid valve both connect the pipeline connected to the reservoir; the temperature control valve is closed;

[0024] The speed switching condition is used to switch the refrigeration system from a medium speed condition or a low speed condition to a high speed condition; the first solenoid valve and the second solenoid valve both connect the pipeline connected to the liquid storage device, the temperature control valve, and the flow valve;

[0025] The speed switching condition is operated for a predetermined time period and then switches to the high speed condition.

[0026] According to the refrigerant flow rate variable refrigeration system of the present invention, the compressor is a variable frequency compressor; and the evaporator is a refrigeration evaporator.

[0027] A refrigeration device comprises the refrigerant flow-amount variable refrigeration system.

[0028] The refrigeration device according to the present invention is a refrigerator or a freezer.

[0029] In summary, the variable refrigerant flow dosage refrigeration system of the present invention temporarily stores the refrigerant that does not participate in the refrigeration cycle through the liquid storage device. A temperature control valve is set to sense the temperature of the first condenser and adjust the opening in real time. Therefore, under different operating conditions, the refrigerant flow dosage participating in the refrigeration cycle is adaptively adjusted to make the dosage compatible with the operating conditions. The refrigeration efficiency is improved and the refrigeration effect is guaranteed. The present invention also provides a refrigeration device having the variable refrigerant flow dosage refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the operating principle of the high-speed working condition of the refrigeration system of the first embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the operating principle of the refrigeration system of the first embodiment of the present invention under medium speed condition;

[0032] Figure 3 Schematic diagram of the operating principle of the refrigeration system of the first embodiment of the present invention under low speed conditions;

[0033] Figure 4 Schematic diagram of the operating principle of the speed switching condition of the refrigeration system of the first embodiment of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the temperature control valve of the present invention;

[0035] Figure 6It is a schematic diagram of the operating principle of the high-speed working condition of the second embodiment of the refrigeration system of the present invention;

[0036] Figure 7 Schematic diagram of the operating principle of the refrigeration system of the second embodiment of the present invention under the medium speed condition;

[0037] Figure 8 Schematic diagram of the operating principle of the refrigeration system of the second embodiment of the present invention under low speed conditions;

[0038] Fig. 9 Schematic diagram of the operating principle of the speed switching condition of the refrigeration system of the second embodiment of the present invention;

[0039] In the figure: 1-compressor, 11-evaporator, 12-first throttle, 13-second throttle; 2-temperature control valve, 21-valve body, 211-expansion chamber; 22-temperature sensing package, 23-elastic membrane, 24-connecting rod, 25-adjusting block, 26-partition plate, 27-spring, 28-inlet nozzle, 29-outlet nozzle; 3-liquid reservoir, 31-flow valve; 4-first condenser, 41-second condenser; 5-first solenoid valve, 51-second solenoid valve. DETAILED DESCRIPTION

[0040] Embodiment 1:

[0041] See also Figure 1 The present invention provides a refrigerant flow quantity variable refrigeration system, comprising a compressor 1, a first condenser 4, a first solenoid valve 5, a first throttle 12 and an evaporator 11 which are cyclically connected in sequence; the inlet of the first condenser 4 is also connected to a temperature control valve 2, the temperature control valve 2 is connected to a liquid reservoir 3, and the liquid reservoir 3 is also connected to the first solenoid valve 5;

[0042] Combination Figure 5 The temperature control valve 2 has an air inlet nozzle 28, an air outlet nozzle 29 and a temperature sensing package 22; the air inlet nozzle 28 is connected to the first condenser 4, and the air outlet nozzle 29 is connected to the liquid reservoir 3; the temperature sensing package 22 is attached to the first condenser 4;

[0043] The temperature control valve 2 is configured to: detect the temperature of the first condenser 4 through the temperature sensing package 22, and automatically adjust the flow rate of the gaseous refrigerant from the air inlet nozzle 28 to the air outlet nozzle 29 according to the temperature;

[0044] As a preferred solution, the temperature control valve 2 is a thermal expansion valve, including a valve body 21, a partition plate 26 is provided in the valve body 21, and a vent hole is opened on the partition plate 26; the valve body 21 is also provided with an air inlet nozzle 28 and an air outlet nozzle 29 respectively located on both sides of the partition plate 26; an expansion chamber 211 is provided at one end of the valve body 21, and an elastic membrane 23 is provided in the expansion chamber 211; the temperature sensing bag 22 is provided at the end of the expansion chamber 211; a connecting rod 24 is movably connected in the vent hole of the partition plate 26; one end of the connecting rod 24 is connected to the elastic membrane 23, and the other end is connected to the adjusting block 25 adapted to the vent hole; a spring 27 is provided between the adjusting block 25 and the inner wall of the valve body 21;

[0045] The movement of the elastic membrane 23 is transmitted to the regulating block 25 through the connecting rod 24, thereby changing the opening of the vent hole and controlling the flow rate of the gaseous refrigerant.

[0046] The refrigeration system of the present invention has multiple operating conditions, and the speed of the compressor 1 is different under different operating conditions. Specifically:

[0047] See also Figure 1 , high speed working condition: the first solenoid valve 5 shuts off the pipeline connected to the liquid reservoir 3; at this time, the temperature of the first condenser 4 is high, the opening of the temperature control valve 2 is large, but the first solenoid valve 5 shuts off the liquid reservoir 3, so the gaseous refrigerant does not enter the liquid reservoir 3, and all enters the first condenser 4, avoiding the problem of lack of liquid. Under this working condition, the circulation of the refrigerant in the refrigeration system is large, ensuring the refrigeration effect.

[0048] See also Figure 2 , Medium speed working condition: The first solenoid valve 5 connects the pipeline connected to the liquid reservoir 3; at this time, the first condenser 4 has a certain temperature, and the temperature control valve 2 is turned on. Part of the gaseous refrigerant enters the liquid reservoir 3 through the temperature control valve 2. The height of the liquid reservoir 3 is lower than the first solenoid valve 5, and part of the liquid refrigerant enters the liquid reservoir 3 under the action of gravity.

[0049] Under this operating condition, the amount of refrigerant circulating in the refrigeration system is reduced to avoid the problem of excessive liquid, so that the circulation amount of the refrigerant is adapted to the operating condition of the refrigeration system.

[0050] In the liquid storage tank 3, gaseous refrigerant enters one end and liquid refrigerant flows into the other end; when the pressure in the liquid storage tank 3 can offset the gravity of the liquid refrigerant, an equilibrium state is reached, and no more liquid refrigerant enters. The amount of refrigerant in the refrigeration system is adapted to the working conditions of the refrigeration system.

[0051] When the speed of the working condition changes, causing the temperature of the first condenser 4 to change, the temperature control valve 2 adjusts the opening accordingly, thereby adjusting the amount of gaseous refrigerant entering the liquid storage tank 3. Specifically:

[0052] If the temperature of the first condenser 4 increases, the opening of the temperature control valve 2 becomes larger, and the amount of gaseous refrigerant entering the liquid reservoir 3 increases, thereby reducing the amount of liquid refrigerant entering the liquid reservoir 3, meeting the needs of the refrigeration system;

[0053] If the temperature of the first condenser 4 decreases, the opening of the temperature control valve 2 becomes smaller, and the amount of gaseous refrigerant entering the liquid reservoir 3 decreases, thereby increasing the amount of liquid refrigerant entering the liquid reservoir 3 to meet the needs of the refrigeration system;

[0054] The present invention can adaptively adjust the amount of refrigerant circulating in the refrigeration system according to the temperature change of the first condenser 4, so that it can adapt to the operating conditions and achieve the best refrigeration effect.

[0055] See also Figure 3 , low speed working condition: the first solenoid valve 5 connects the pipeline connected to the liquid reservoir 3; at this time, the temperature of the first condenser 4 is low, and the temperature control valve 2 is closed. No gaseous refrigerant enters the liquid reservoir 3. More liquid refrigerant enters the liquid reservoir 3 under the action of gravity. Reduce the amount of refrigerant circulating in the refrigeration system to adapt to the low speed working condition.

[0056] See also Figure 4 , further, the present invention also has a speed switching condition, which is used for switching the refrigeration system from a medium speed condition or a low speed condition to a high speed condition;

[0057] Under this working condition: the first solenoid valve 5 connects the pipeline connected to the liquid reservoir 3; at this time, the temperature of the first condenser 4 increases, the opening of the temperature control valve 2 gradually increases, the amount of gaseous refrigerant entering the liquid reservoir 3 through the temperature control valve 2 gradually increases, and the liquid refrigerant temporarily stored in the liquid reservoir 3 is sent to the refrigeration system through the first solenoid valve 5 to participate in the circulation.

[0058] This operating condition is operated for a certain period of time, and after all the liquid refrigerant in the liquid storage device 3 participates in the refrigeration cycle, the refrigeration system switches to the high speed operating condition. The operating time of the speed switching condition can be determined based on multiple tests.

[0059] In the medium speed working condition and the low speed working condition of the present invention, the operation mode of the refrigeration system is the same, and the temperature control valve 2 can automatically adjust its shutoff, conduction and opening according to the temperature of the first condenser 4 to complete the switching between these two working conditions.

[0060] Preferably, the compressor 1 of the present invention is a variable frequency compressor; the evaporator 11 is a refrigeration evaporator.

[0061] Embodiment 2:

[0062] See also Figure 6The refrigerant flow rate variable refrigeration system of the present invention further includes a second condenser 41, wherein the second condenser 41 is connected to the second throttle 13, and the second throttle 13 is also connected to the evaporator 11;

[0063] It also includes a second solenoid valve 51, which is connected to the temperature control valve 2, the second condenser 41 and the liquid reservoir 3 respectively;

[0064] Optionally, the first throttle 12 and the second throttle 13 of the present invention are both capillaries, and may also be throttle valves.

[0065] See also Figure 6 , high speed working condition: the first solenoid valve 5 and the second solenoid valve 51 respectively cut off the pipeline connected to the liquid reservoir 3;

[0066] At this time, the temperature of the first condenser 4 is high, the opening of the temperature control valve 2 is large, and the gaseous refrigerant enters the second condenser 41 through the temperature control valve 2 to participate in the refrigeration cycle.

[0067] Under this working condition, the first condenser 4 and the second condenser 41 work simultaneously, which reduces the load of the refrigeration system and improves the refrigeration efficiency.

[0068] See also Figure 7 , Medium speed working condition: the first solenoid valve 5 and the second solenoid valve 51 both connect the pipeline connected to the liquid reservoir 3;

[0069] At this time, the first condenser 4 has a certain temperature, and the temperature control valve 2 is turned on. Part of the gaseous refrigerant enters the liquid reservoir 3 through the temperature control valve 2 and the second solenoid valve 51. Part of the liquid refrigerant enters the liquid reservoir 3 under the action of gravity, reducing the amount of refrigerant circulating in the refrigeration system.

[0070] Furthermore, the liquid storage device 3 is also connected to the first throttle 12 through a flow valve 31; a small amount of gaseous refrigerant participates in the refrigeration cycle through the second condenser 41. When the first condenser 4 increases to a predetermined temperature, the flow valve 31 opens to maintain the normal operation of the working condition and automatically adjusts the amount of refrigerant participating in the refrigeration cycle.

[0071] See also Figure 8 , Low speed working condition: the first solenoid valve 5 and the second solenoid valve 51 both connect the pipeline connected to the liquid reservoir 3;

[0072] At this time, the temperature of the first condenser 4 is low, and the temperature control valve 2 is closed. Liquid refrigerant enters the liquid storage tank 3 under the action of gravity. Preferably, the flow valve 31 can set a threshold. Under low speed conditions, the flow valve 31 is closed to reduce the amount of refrigerant circulating in the refrigeration system.

[0073] See also Fig. 9, speed switching condition: the first solenoid valve 5 and the second solenoid valve 51 both connect the pipeline connected to the liquid reservoir 3, and the flow valve 31 is turned on;

[0074] At this time, the temperature of the first condenser 4 rises, the opening of the temperature control valve 2 gradually increases, the amount of gaseous refrigerant entering the liquid reservoir 3 gradually increases, and the liquid refrigerant temporarily stored in the liquid reservoir 3 is sent to the refrigeration system through the first solenoid valve 5 to participate in the circulation.

[0075] This operating condition is operated for a certain period of time, and after all the liquid refrigerant in the liquid storage device 3 participates in the refrigeration cycle, the refrigeration system switches to the high speed operating condition. The operating time of the speed switching condition can be determined based on multiple tests.

[0076] The refrigerant flow quantity variable refrigeration system of the present invention temporarily stores the refrigerant not participating in the refrigeration cycle through the liquid storage 3. The temperature control valve 2 is set to sense the temperature of the first condenser and adjust the opening in real time. Therefore, under different operating conditions, the refrigerant flow quantity participating in the refrigeration cycle is adaptively adjusted to make the quantity compatible with the operating conditions. Without changing the total refrigerant filling amount, the problems of lack of liquid, excessive liquid, etc. are eliminated, the refrigeration efficiency is improved, and the refrigeration effect is guaranteed.

[0077] The present invention also provides a refrigeration device having the refrigerant flow-dosage variable refrigeration system, which ensures the overall refrigeration performance of the refrigeration device and improves product quality.

[0078] Furthermore, the refrigeration equipment is a refrigerator or a freezer.

[0079] In summary, the present invention provides a refrigeration system with a variable refrigerant flow rate, which temporarily stores refrigerant that does not participate in the refrigeration cycle through a liquid storage device. A temperature control valve is provided to sense the temperature of the first condenser and adjust the opening in real time. Therefore, under different operating conditions, the amount of refrigerant flowing in the refrigeration cycle is adaptively adjusted to match the operating conditions. The refrigeration efficiency is improved and the refrigeration effect is guaranteed. The present invention also provides a refrigeration device having the variable refrigerant flow rate refrigeration system.

[0080] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A refrigeration system with variable refrigerant flow rate, characterized in that: It comprises a compressor, a first condenser, a first solenoid valve, a first throttle and an evaporator which are connected in a circular manner in sequence; the inlet of the first condenser is also connected to a temperature control valve, the temperature control valve is connected to a liquid reservoir, and the liquid reservoir is also connected to the first solenoid valve; The temperature control valve comprises an air inlet nozzle, an air outlet nozzle and a temperature sensing package; the air inlet nozzle is connected to the first condenser, the air outlet nozzle is connected to the liquid reservoir; the temperature sensing package is attached to the first condenser; The temperature control valve is configured to detect the temperature of the first condenser through a temperature sensing package, and automatically adjust the flow rate of the gaseous refrigerant from the air inlet nozzle to the air outlet nozzle according to the temperature.

2. The refrigerant flow rate variable refrigeration system according to claim 1, characterized in that: The temperature control valve is a thermal expansion valve, comprising a valve body, a partition plate is provided in the valve body, and a vent is opened on the partition plate; the valve body is also provided with an air inlet nozzle and an air outlet nozzle respectively located on both sides of the partition plate; an expansion chamber is provided at one end of the valve body, and an elastic membrane is provided in the expansion chamber; the temperature sensing bag is provided at the end of the expansion chamber; a connecting rod is movably connected in the vent of the partition plate; one end of the connecting rod is connected to the elastic membrane, and the other end is connected to an adjusting block adapted to the vent; a spring is provided between the adjusting block and the inner wall of the valve body.

3. The refrigerant flow rate variable refrigeration system according to claim 1, characterized in that: It also includes a second condenser, wherein the second condenser is connected to a second throttle, and the second throttle is also connected to the evaporator; It also includes a second solenoid valve, which is connected to the temperature control valve, the second condenser and the liquid storage device respectively.

4. The refrigerant flow rate variable refrigeration system according to claim 3, characterized in that: The liquid reservoir is also connected to the first throttle via a flow valve.

5. The refrigerant flow rate variable refrigeration system according to claim 3, characterized in that: The first throttle and the second throttle are both capillaries or throttle valves.

6. The refrigerant flow rate variable refrigeration system according to claim 1, characterized in that: The refrigeration system has multiple operating conditions, specifically: High speed working condition: the first solenoid valve shuts off the pipeline connected to the reservoir; Medium speed working condition: the first solenoid valve connects the pipeline connected to the reservoir; the temperature control valve is turned on; Low speed working condition: the first solenoid valve connects the pipeline connected to the reservoir; the temperature control valve is closed; The speed switching condition is used to switch the refrigeration system from a medium speed condition or a low speed condition to a high speed condition; the first solenoid valve turns on the pipeline connected to the liquid storage device; the temperature control valve turns on; The speed switching condition is operated for a predetermined time and then switches to a high speed condition.

7. The refrigerant flow rate variable refrigeration system according to claim 4, characterized in that: The refrigeration system has multiple operating conditions, specifically: High speed working condition: both the first solenoid valve and the second solenoid valve shut off the pipeline connected to the reservoir; Medium speed working condition: the first solenoid valve and the second solenoid valve both connect the pipeline connected to the reservoir; the temperature control valve is turned on; Low speed working condition: the first solenoid valve and the second solenoid valve both connect the pipeline connected to the reservoir; the temperature control valve is closed; The speed switching condition is used to switch the refrigeration system from a medium speed condition or a low speed condition to a high speed condition; the first solenoid valve and the second solenoid valve both connect the pipeline connected to the liquid storage device, the temperature control valve, and the flow valve; The speed switching condition is operated for a predetermined time period and then switches to the high speed condition.

8. The refrigerant flow rate variable refrigeration system according to claim 1, characterized in that: The compressor is a variable frequency compressor; the evaporator is a refrigeration evaporator.

9. A refrigeration device, characterized in that: A refrigeration system with variable refrigerant flow rate as claimed in any one of claims 1 to 8.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration equipment is a refrigerator or a freezer.

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