CN211120208U - Refrigerating equipment - Google Patents

Refrigerating equipment Download PDF

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Publication number
CN211120208U
CN211120208U CN201921991191.7U CN201921991191U CN211120208U CN 211120208 U CN211120208 U CN 211120208U CN 201921991191 U CN201921991191 U CN 201921991191U CN 211120208 U CN211120208 U CN 211120208U
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evaporator
temperature
flow path
refrigeration
refrigerating
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Inventor
董安琪
石映晖
孙彬
王国庆
卢玉波
刘嘉瑞
郝刚卫
晏刚
鱼剑琳
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Xian Jiaotong University
Hisense Refrigerator Co Ltd
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Xian Jiaotong University
Hisense Shandong Refrigerator Co Ltd
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Abstract

The utility model relates to a refrigeration plant, including first flow path switching mechanism, first flow path switching mechanism is connected with the evaporimeter entry flow path of two at least evaporimeters that connect in parallel, selects the evaporimeter that the refrigerant flowed through first flow path switching mechanism to the low temperature storeroom refrigeration that corresponds different evaporimeters realizes the different temperature demands of different low temperature storerooms, can realize the difference demand of multi-temperature-zone temperature, satisfies the storage requirement of multiple food. The utility model discloses can realize multi-temperature-zone refrigeration, dark low temperature refrigeration, can increase unit refrigeration capacity.

Description

Refrigerating equipment
Technical Field
The utility model belongs to the technical field of the domestic appliance technique and specifically relates to a refrigeration plant is related to.
Background
With the improvement of living standard of people, people pay more and more attention to the safety and health of food. Fruits and vegetables, meat, seafood, beverages and the like have different suitable storage temperatures, and in order to store various foods more scientifically and healthily, the foods are stored in respective fresh-keeping temperature regions, refrigerators with multiple temperature regions are more and more popular with consumers, and the market share of the refrigerators is gradually increased.
For example, in the patent document CN106568218A, two cycles are that high boiling point refrigerant liquid separated by a gas-liquid separator is throttled and then supplied to two high temperature evaporators connected in parallel or in series, and low boiling point refrigerant gas is condensed and throttled and then supplied to one low temperature evaporator to provide cooling capacity. The three cycles of patent document CN106482432A are added with one to two regenerations based on patent document CN 106568218A. Patent document CN106568274A adopts a dual loop based on patent document CN106568218A and patent document CN106482432A to increase the temperature zone.
However, after the compressor of the existing multi-temperature-zone refrigerator is started, all evaporators are in an operating state, the temperature of each chamber can be adjusted only by adjusting the rotating speed of a fan or controlling the starting and stopping of the fan, the accuracy of temperature control is not high enough, and the temperature difference of different temperature zones is small, so that the low refrigerating temperature cannot be realized. The method can increase the heat transfer temperature difference in a high-temperature interval room, increase the irreversible heat transfer loss, and when a certain compartment does not need to supply cold, the refrigerant still flows through the evaporator of the compartment, increase the cold loss and reduce the efficiency of the whole machine. Therefore, the temperature difference of different temperature areas of the existing multi-temperature-area refrigerator is small, the very low refrigeration temperature cannot be realized, and the storage requirements of some special foods cannot be met.
Disclosure of Invention
After compressor starts among the solution prior art, all evaporimeters refrigerate simultaneously, can't realize the refrigeration flow path and switch, and different warm area temperature differences are little, the technical problem that cold volume utilization ratio is low, the utility model provides a refrigeration plant can select corresponding evaporimeter refrigeration after its refrigerating system compressor starts, can realize a plurality of warm areas that the temperature difference is big, satisfies the storage requirement of multiple food.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a refrigeration appliance comprising:
a low temperature storage chamber and a refrigeration system for supplying cold to the low temperature storage chamber;
the refrigeration system includes:
a compressor connected with a compressor inlet flow path and a compressor outlet flow path;
a first condenser connected to the compressor outlet flow path and connected to a first condenser outlet flow path;
the gas-liquid separator is connected with the first condenser outlet flow path and is connected with a gas-liquid separator gas outlet flow path and a gas-liquid separator liquid outlet flow path;
a second condenser connected to the gas-liquid separator gas outlet flow path and connected to a second condenser outlet flow path;
the evaporator comprises at least two evaporators connected in parallel, wherein an inlet and an outlet of each evaporator are respectively connected with an evaporator inlet flow path and an evaporator outlet flow path, and a throttling device is arranged on the evaporator inlet flow path;
a regenerator including a first conduit and a second conduit in heat exchange with each other, the first conduit for connecting the second condenser outlet flow path, the second conduit for connecting the compressor inlet flow path and the evaporator outlet flow path;
and the first flow path switching mechanism is used for connecting the first pipeline and a plurality of evaporator inlet flow paths and is used for controllably switching the flowing direction of the refrigerant.
The technical scheme of the utility model prior art relatively has following technological effect: the utility model discloses refrigeration plant includes first flow switching mechanism, and first flow switching mechanism is connected with the evaporimeter entry flow path of two at least evaporimeters that connect in parallel, selects the evaporimeter that the refrigerant flowed through first flow switching mechanism to the low temperature storeroom refrigeration that corresponds different evaporimeters realizes the different temperature demands of different low temperature storerooms, can realize the difference demand of multi-temperature-zone temperature, satisfies the storage requirement of multiple food. The utility model discloses can realize multi-temperature-zone refrigeration, dark low temperature refrigeration, can increase unit refrigeration capacity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a control block diagram of a refrigeration apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic view of a refrigeration system of a refrigeration apparatus according to an embodiment of the present invention.
Fig. 3 is a control block diagram of a second refrigeration apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic view of a refrigeration system of a refrigeration device according to an embodiment of the present invention.
Fig. 5 is a schematic view of a refrigeration system of a refrigeration device according to an embodiment of the present invention.
Reference numerals:
101-a compressor; 102-a first condenser; 103-gas-liquid separator; 104-a second condenser; 105-a regenerator; 106-a first throttling means; 107-check valve; 108-a first flow-path switching mechanism; 109-second throttling means; 110-a refrigerated evaporator; 111-a third throttling means; 112-a refrigerated evaporator; 113-a temperature-changing evaporator; 114-a secondary refrigeration evaporator; 115-refrigeration flow path switching mechanism; 116-a two-stage refrigeration flow path switching mechanism; 117-freezing flow path switching mechanism; 118-a temperature-changing flow path switching mechanism; 119-fourth throttling means; 120-a primary three-way valve; 121 two-stage three-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
A refrigeration appliance comprising:
a low temperature storage chamber and a refrigeration system for supplying cold to the low temperature storage chamber;
the refrigeration system includes:
a compressor connected with a compressor inlet flow path and a compressor outlet flow path;
a first condenser connected to the compressor outlet flow path and connected to the first condenser outlet flow path;
the gas-liquid separator is connected with the first condenser outlet flow path and is connected with a gas-liquid separator gas outlet flow path and a gas-liquid separator liquid outlet flow path;
the second condenser is connected with the gas outlet flow path of the gas-liquid separator and is connected with a second condenser outlet flow path;
the evaporator comprises at least two evaporators connected in parallel, wherein an inlet and an outlet of each evaporator are respectively connected with an evaporator inlet flow path and an evaporator outlet flow path, and a throttling device is arranged on the evaporator inlet flow path;
the heat regenerator comprises a first pipeline and a second pipeline which exchange heat with each other, wherein the first pipeline is used for connecting a second condenser outlet flow path, and the second pipeline is used for connecting a compressor inlet flow path and an evaporator outlet flow path;
and the first flow path switching mechanism is used for controllably switching the flowing direction of the refrigerant.
In some embodiments, the evaporator includes a refrigerating evaporator and a freezing evaporator connected in parallel with each other, the refrigerating evaporator for supplying cooling to the refrigerating chamber, the freezing evaporator for supplying cooling to the freezing chamber;
the first flow path switching mechanism is used for switching the flow direction of the refrigerant to preferentially flow to the refrigeration evaporator when the refrigeration chamber and the freezing chamber both need refrigeration so as to preferentially meet the requirement of the refrigeration chamber.
The evaporator also comprises a variable temperature evaporator which is used for providing cold energy for the variable temperature chamber;
the variable temperature evaporator is connected with the freezing evaporator in series, and the inlet of the variable temperature evaporator is connected with the outlet of the freezing evaporator. The temperature demand of the variable temperature chamber is different from that of the refrigerating chamber and the freezing chamber to provide various temperature intervals for users.
In some embodiments, the refrigeration system further comprises:
a freezing branch and/or a temperature-changing branch; the freezing branch is connected in parallel to the freezing evaporator, and the variable temperature branch is connected in parallel to the variable temperature evaporator;
the freezing flow path switching mechanism is used for controllably switching the flow of the refrigerant to the freezing branch or the freezing evaporator;
and the temperature change flow path switching mechanism is used for controllably switching the flow of the refrigerant to the temperature change branch or the temperature change evaporator.
The freezing flow path switching mechanism is used for controllably switching the refrigerant to flow to the freezing evaporator when the freezing chamber needs refrigeration, and controllably switching the refrigerant to flow to the freezing branch when the freezing chamber does not need refrigeration;
the temperature-changing flow path switching mechanism is used for controllably switching the refrigerant to flow to the temperature-changing evaporator when the temperature-changing chamber needs to be refrigerated, and controllably switching the refrigerant to flow to the temperature-changing branch when the temperature-changing chamber does not need to be refrigerated. Can respectively supply cold to the freezing chamber or the temperature changing chamber, and improve the utilization rate of cold energy.
In some embodiments, the refrigeration system further comprises:
the cold-stored evaporimeter of second grade, the cold-stored evaporimeter of second grade is used for providing cold volume to the second grade walk-in, and the cold-stored evaporimeter of second grade is established ties on cold-stored evaporimeter, and the entry of the cold-stored evaporimeter of second grade is connected with the exit linkage of cold-stored evaporimeter.
The refrigeration system further includes:
the refrigeration system comprises a refrigeration branch and/or a secondary refrigeration branch, wherein the refrigeration branch is connected to a refrigeration evaporator in parallel, and the secondary refrigeration branch is connected to the secondary refrigeration evaporator in parallel;
the refrigerating flow path switching mechanism is used for controllably switching the flow of the refrigerant to the refrigerating branch or the refrigerating evaporator;
and the secondary refrigeration flow path switching mechanism is used for controllably switching the refrigerant to flow to the secondary refrigeration branch or the secondary refrigeration evaporator.
The refrigerating flow path switching mechanism is used for controllably switching the refrigerant to flow to the refrigerating evaporator when the refrigerating chamber needs refrigerating and controllably switching the refrigerant to flow to the refrigerating branch when the refrigerating chamber does not need refrigerating; the secondary refrigerating flow path switching mechanism is used for controlling and switching the refrigerant to flow to the secondary refrigerating evaporator when the secondary refrigerating chamber needs to refrigerate; for controlled switching of refrigerant flow to the secondary refrigeration branch when refrigeration is not required in the secondary refrigeration compartment. The refrigerating chamber and the secondary refrigerating chamber can be respectively cooled, and the utilization rate of cold energy is improved.
The refrigeration equipment comprises a fan corresponding to the evaporator, and the fan is controlled to be started when the refrigerant flows through the evaporator.
In order to reduce throttling loss, the liquid outlet flow path of the gas-liquid separator is connected with the outlet flow path of the evaporator through a first throttling device; a check valve for preventing the refrigerant from flowing backward to the evaporator is provided in the evaporator outlet flow path.
Example one
The refrigeration equipment comprises a box body formed with a low-temperature storage chamber, the low-temperature storage chamber, a refrigeration system used for supplying cold to the low-temperature storage chamber, a temperature detection module used for detecting the temperature of the low-temperature storage chamber, a controller and the refrigeration system. The number of the low-temperature storerooms is matched with that of the evaporators in the refrigerating system, and the evaporators are used for refrigerating the low-temperature storerooms.
As shown in fig. 1 and 2, the refrigeration apparatus of the present embodiment includes two evaporators connected in parallel: the refrigeration evaporator 110, the freezing evaporator 112, and the freezing evaporator 112 are described as an example in which a temperature-changing evaporator 113 is connected in series.
The refrigerating apparatus of the present embodiment includes a refrigerating chamber corresponding to the refrigerating evaporator 110, a freezing chamber corresponding to the freezing evaporator 112, and a temperature-varying chamber corresponding to the temperature-varying evaporator 113. The refrigerating evaporator 110 is used for supplying cold to the refrigerating chamber, the freezing evaporator 112 is used for supplying cold to the freezing chamber, and the temperature-varying evaporator 113 is used for supplying cold to the temperature-varying chamber.
And the temperature detection module is positioned in the low-temperature storage chamber and used for detecting the temperature of the low-temperature storage chamber and transmitting a temperature signal to the controller. And each low-temperature storage room is correspondingly provided with a temperature detection module.
The following is a detailed description of the refrigeration system:
as shown in fig. 2, the refrigeration system of the present embodiment includes:
compressor 101, compressor 101 includes compressor entry and compressor outlet, and compressor entry connects with the compressor entry flow path, and compressor outlet connects with the compressor outlet flow path.
First condenser 102, first condenser 102 includes first condenser inlet and first condenser outlet, and first condenser inlet is connected with compressor outlet flow path, and first condenser outlet connection has first condenser outlet flow path.
And the gas-liquid separator 103 comprises a gas-liquid separator inlet, a gas outlet and a liquid outlet, the gas-liquid separator inlet is connected with the first condenser outlet flow path, the gas outlet is connected with the gas-liquid separator gas outlet flow path, and the liquid outlet is connected with the gas-liquid separator liquid outlet flow path.
And the second condenser 104, wherein the second condenser 104 comprises a second condenser inlet and a second condenser outlet, the second condenser inlet is connected with the gas-liquid separator gas outlet flow path, and the second condenser outlet is connected with a second condenser outlet flow path.
And a refrigerating evaporator 110, wherein an inlet of the refrigerating evaporator 110 is connected with the refrigerating evaporator inlet flow path, and an outlet of the refrigerating evaporator 110 is connected with the refrigerating evaporator outlet flow path. A second throttle device 109 is provided in the inlet flow path of the refrigeration evaporator.
The refrigeration evaporator 112 and the temperature-changing evaporator 113 are connected in series, the inlet of the refrigeration evaporator 112 is connected with the inlet flow path of the refrigeration evaporator, the outlet of the refrigeration evaporator 112 is connected with the inlet of the temperature-changing evaporator 113, and the outlet of the temperature-changing evaporator 113 is connected with the outlet flow path of the temperature-changing evaporator. A third throttling device 111 is provided in the inlet flow path of the refrigeration evaporator.
The regenerator 105 includes a first pipe and a second pipe that exchange heat with each other, and an inlet of the first pipe is connected to an outlet flow path of the second condenser 104. The second line is used to connect the compressor inlet flow path and the evaporator outlet flow path (the line where the refrigeration evaporator outlet flow path and the temperature-varying evaporator outlet flow path merge).
And a first flow path switching mechanism connecting the first pipe line with the refrigerating evaporator inlet flow path and the freezing evaporator inlet flow path. The first flow path switching mechanism is used for controllably switching the flowing direction of the refrigerant.
In this embodiment, the first flow switching mechanism 108 is a three-way valve 108, an inlet of the three-way valve 108 is connected to a first line outlet of the heat regenerator 105, a first outlet of the three-way valve 108 is connected to a refrigerating evaporator inlet flow path, and a second outlet of the three-way valve 108 is connected to a freezing evaporator inlet flow path.
Of course, the first flow switching mechanism may include two switching valves, inlets of the two switching valves are connected to an outlet of the first pipeline, an outlet of one switching valve is connected to the inlet flow path of the refrigeration evaporator, and an outlet of the other switching valve is connected to the inlet flow path of the refrigeration evaporator.
And a controller for controlling the compressor and the first flow path switching mechanism. Specifically, the controller controls the start-stop and the running frequency of the compressor and controls the three-way valve to be connected with the inlet flow path of the refrigeration evaporator or the inlet flow path of the freezing evaporator according to the relationship between the set temperature of the low-temperature storage chamber and the actual temperature detected by the temperature detection module.
In order to reduce throttling loss, the liquid outlet flow path of the gas-liquid separator is connected with a pipeline after the outlet flow path of the refrigeration evaporator and the outlet flow path of the temperature-changing evaporator are converged through a first throttling device 106. A check valve 107 for preventing the refrigerant from flowing backward to the evaporator is provided in the merged pipe.
The refrigeration equipment comprises a fan corresponding to the evaporator, the controller is used for controlling the start and stop of the fan, and the fan is controlled to start when refrigerant flows through the evaporator.
The refrigerating equipment adopts mixed refrigerant, and the mixed refrigerant comprises two refrigerants with different boiling points.
In the refrigeration system of the embodiment, a non-azeotropic mixed working medium is used as a refrigerant, the mixed gas refrigerant which is separated by the gas-liquid separator 103 and is rich in the low-boiling-point refrigerant provides cold energy for the three evaporators, and the fluid which is rich in the low-boiling-point refrigerant can realize lower refrigeration temperature; the separated mixed liquid refrigerant rich in the high-boiling-point refrigerant and the mixed refrigerant rich in the low-boiling-point refrigerant at the outlet of the refrigeration evaporator 110 or the temperature-changing evaporator 113 are mixed and then enter the heat regenerator 105 for heat exchange, so that the supercooling degree of the mixed refrigerant rich in the low-boiling-point refrigerant at the outlet of the second condenser 104 is increased, flash gas generated after throttling is reduced, the unit refrigerating capacity is increased, and meanwhile, as the supercooling degree is increased, the throttling process is closer to the isentropic process, and the throttling loss is reduced.
The first flow path switching mechanism of the present embodiment is used to control to switch the flow direction of the refrigerant to preferentially flow to the refrigeration evaporator when both the refrigeration compartment and the freezing compartment require refrigeration.
Specifically, before the refrigeration equipment is started, the compressor and the fan are both stopped, and when the refrigeration equipment is started, the temperature t of the refrigerating chamber isRWhen the temperature is higher than the highest refrigerating temperature, the compressor is started, the three-way valve 108 is in a state 1 of being communicated with the refrigerating evaporator, the refrigerating fan is started, and the fluid rich in the low-boiling-point refrigerant is throttled by the second throttling device 109 and then enters the refrigerating evaporator 110 to absorb heat. Until the refrigerating chamber temperature t is monitoredRBelow a set minimum temperature tRminAt the same time, the refrigerating fan is stopped to control the temperature t of the freezing chamberFAnd temperature t of variable temperature chamberVAnd (5) monitoring.
When the temperature t of the refrigerating chamber is monitoredRLower than a set maximum temperature tRmaxAnd the freezer temperature tFOr temperature t of variable temperature chamberVAbove the corresponding set maximum temperature tFmax、tVmaxAt this time, the three-way valve 108 is switched to coldIn the state 2 of communication of the freezing evaporator, the fluid rich in the low-boiling-point refrigerant is throttled by the third throttling device 111 and enters the freezing evaporator 112 and the temperature-changing evaporator 113 to absorb heat. When t isF>tFmaxWhen the freezing fan is started, when t isV>tVmaxWhen the temperature-variable fan is started; when the temperature t of the freezing chamber is monitoredFBelow a set minimum temperature tFminWhen the temperature of the temperature-changing chamber t is monitored, the refrigerating fan is stoppedVBelow a set minimum temperature tVminAnd when the temperature-changing fan is started, the temperature-changing fan is stopped. Meanwhile, in the cooling process of the freezing chamber and the temperature-changing chamber, the temperature t of the refrigerating chamber is continuously monitoredROnce refrigerating compartment temperature tRAbove a set maximum temperature tRmaxThe three-way valve 108 switches to state 1, which communicates with the refrigerated evaporator.
Example two
The present embodiment is different from the first embodiment in that the refrigeration apparatus of the present embodiment includes four low-temperature storage compartments.
As shown in fig. 3 and 4, the present embodiment includes four evaporators, and four low-temperature storage compartments corresponding to the four evaporators, specifically, a primary refrigerating compartment corresponding to the refrigerating evaporator 110, a freezing compartment corresponding to the freezing evaporator 112, a temperature-changing compartment corresponding to the temperature-changing evaporator 113, and a secondary refrigerating compartment corresponding to the secondary refrigerating evaporator 114. The refrigeration evaporator 110 is used for providing refrigeration to the first-stage refrigerating chamber, the freezing evaporator 112 is used for providing refrigeration to the freezing chamber, the temperature-changing evaporator 113 is used for providing refrigeration to the temperature-changing chamber, and the second-stage refrigeration evaporator 114 is used for providing refrigeration to the second-stage refrigerating chamber.
As shown in fig. 4, the refrigeration system of the refrigeration apparatus of the present embodiment includes a refrigeration evaporator 110 and a two-stage refrigeration evaporator 114 connected in series, and a freezing evaporator 112 and a temperature-changing evaporator 113 connected in series. The refrigerating evaporator 110 and the two-stage refrigerating evaporator 114 connected in series are connected in parallel with the freezing evaporator 112 and the temperature-changing evaporator 113 connected in series.
The refrigeration evaporator 110 is connected in parallel with a refrigeration branch, the freezing evaporator 112 is connected in parallel with a freezing branch, the temperature-changing evaporator 113 is connected in parallel with a temperature-changing branch, and the secondary refrigeration evaporator 114 is connected in parallel with a secondary refrigeration branch.
And a refrigerating flow path switching mechanism 115 for controllably switching the flow of the refrigerant to the refrigerating branch or the refrigerating evaporator 110.
And a secondary refrigeration flow path switching mechanism 116 for controlled switching of refrigerant flow to the secondary refrigeration branch or secondary refrigeration evaporator 114.
A freezing flow path switching mechanism 117 for controllably switching the flow of the refrigerant to the freezing branch or the freezing evaporator 112;
and a temperature-varying flow path switching mechanism 118 for controllably switching the flow of the refrigerant to the temperature-varying branch or the temperature-varying evaporator 113.
The refrigerating flow path switching mechanism 115, the two-stage refrigerating flow path switching mechanism 116, the freezing flow path switching mechanism 117, and the variable temperature flow path switching mechanism 118 are all three-way valves.
The refrigerating evaporator 110 and the inlet of the refrigerating branch are switched by a refrigerating flow path switching mechanism 115.
The inlet of the refrigerating flow switching mechanism 115 is connected to the second throttle device 109, the first outlet is connected to the inlet of the refrigerating evaporator 110, and the second outlet is connected to the inlet of the refrigerating branch passage.
The secondary refrigeration evaporator 114 and the inlet of the secondary refrigeration branch are switched by a secondary refrigeration flow path switching mechanism 116.
The inlet of the secondary refrigeration flow path switching mechanism 116 is connected to the outlets of the refrigeration evaporator 110 and the refrigeration branch, the first outlet is connected to the inlet of the secondary refrigeration evaporator 114, and the second outlet is connected to the inlet of the secondary refrigeration branch.
The freezing evaporator 112 and the inlet of the freezing branch are switched by a freezing flow path switching mechanism 117.
An inlet of the freezing flow path switching mechanism 117 is connected to the third throttling device 111, a first outlet is connected to an inlet of the freezing evaporator 112, and a second outlet is connected to an inlet of the freezing branch.
The temperature-varying evaporator 113 and the inlet of the temperature-varying branch passage are switched by a temperature-varying flow path switching mechanism 118.
The inlet of the variable temperature flow path switching mechanism 118 is connected to the outlets of the freezing evaporator 112 and the freezing branch path, the first outlet is connected to the inlet of the variable temperature evaporator 113, and the second outlet is connected to the inlet of the variable temperature branch path.
The freezing flow path switching mechanism 117 is configured to controllably switch the flow of the refrigerant to the freezing evaporator 112 when the freezing chamber corresponding to the freezing evaporator 112 requires cooling, and to controllably switch the flow of the refrigerant to the freezing branch when the freezing chamber corresponding to the freezing evaporator 112 requires no cooling.
The variable temperature flow path switching mechanism 118 is configured to controllably switch the flow of the refrigerant to the variable temperature evaporator 113 when the temperature-varying chamber corresponding to the variable temperature evaporator 113 requires cooling, and to controllably switch the flow of the refrigerant to the variable temperature branch when the temperature-varying chamber corresponding to the variable temperature evaporator 113 does not require cooling.
The refrigerating flow path switching mechanism 115 is configured to controllably switch the flow of the refrigerant to the refrigerating evaporator 110 when the refrigerating chamber corresponding to the refrigerating evaporator 110 requires cooling, and to controllably switch the flow of the refrigerant to the refrigerating branch when the refrigerating chamber corresponding to the refrigerating evaporator 110 does not require cooling.
The secondary refrigerating flow path switching mechanism 116 is used for controllably switching the flow of the refrigerant to the secondary refrigerating evaporator 114 when the secondary refrigerating chamber corresponding to the secondary refrigerating evaporator 114 needs to be refrigerated; for controlled switching of refrigerant flow to the secondary refrigeration branch when refrigeration is not required in the secondary refrigeration compartment corresponding to the secondary refrigeration evaporator 114.
The first flow path switching mechanism of this embodiment is used to control and switch the flow direction of the refrigerant to preferentially flow to the refrigeration evaporator when the refrigeration chamber corresponding to the refrigeration evaporator and the freezing chamber corresponding to the freezing evaporator both need to refrigerate.
The controller is configured to control the compressor, the first flow path switching mechanism 108, the refrigerating flow path switching mechanism 115, the two-stage refrigerating flow path switching mechanism 116, the freezing flow path switching mechanism 117, and the variable temperature flow path switching mechanism 118.
The controller is used for controlling the starting of the fan corresponding to the evaporator when the actual temperature of the low-temperature storage chamber corresponding to the evaporator is higher than the highest set temperature; the controller is used for controlling the fan that the evaporimeter corresponds to shut down when the actual temperature of the low temperature storeroom that the evaporimeter corresponds is less than minimum set temperature. Specifically, the working process of the refrigeration equipment is as follows:
when the temperature t of the primary refrigerating chamber is monitoredRⅠAbove a set maximum temperature tRⅠmaxAnd the temperature t of the secondary refrigerating chamberRⅡBelow a set minimum temperature tRⅡminWhen the refrigerant is in the state 1 (the state of being communicated with the refrigeration evaporator), the refrigeration flow switching mechanism 115 is in the state 1 (the state of being communicated with the refrigeration evaporator 110), the secondary refrigeration flow switching mechanism 116 is in the state 2 (the state of being communicated with the secondary refrigeration branch), the fan corresponding to the refrigeration evaporator is started, the fans corresponding to the freezing evaporator, the temperature-changing evaporator and the secondary refrigeration evaporator are stopped, and the fluid rich in the low-boiling-point refrigerant is throttled by the second throttling device 109, enters the refrigeration evaporator 110 to absorb heat, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Until the temperature t of the first-stage refrigerating chamber is monitoredRⅠBelow a set minimum temperature tRⅠminAnd when the air conditioner works, the fan corresponding to the refrigeration evaporator stops.
When the temperature t of the primary refrigerating chamber is monitoredRⅠBelow a set minimum temperature tRⅠminAnd the temperature t of the secondary refrigerating chamberRⅡAbove a set maximum temperature tRⅡmaxWhen the refrigerant is in the state 1, the three-way valve 108 is in the state 2 (the state communicated with the refrigerating branch), the secondary refrigerating flow path switching mechanism 116 is in the state 1 (the state communicated with the secondary refrigerating evaporator 114), the fan corresponding to the secondary refrigerating evaporator 114 is started, the fans corresponding to the refrigerating evaporator, the temperature-changing evaporator and the freezing evaporator are stopped, and the fluid rich in the low-boiling-point refrigerant is throttled by the second throttling device 109, directly enters the secondary refrigerating evaporator 114 to absorb heat, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Until the temperature t of the secondary refrigerating chamber is monitoredRⅡBelow a set minimum temperature tRⅡminAnd when the air conditioner works, the fan corresponding to the secondary refrigeration evaporator stops.
When the temperature t of the primary refrigerating chamber is monitoredRⅠAbove a set maximum temperature tRⅠmaxAnd the temperature t of the secondary refrigerating chamberRⅡAbove a set maximum temperature tRⅡmaxIn this case, the three-way valve 108 is in state 1, the refrigerating flow path switching mechanism 115 is in state 1, and the two-stage refrigerating flow path is switchedThe mechanism 116 is in the state 1, the fans corresponding to the refrigeration evaporator and the secondary refrigeration evaporator are started, the fans corresponding to the temperature-changing evaporator and the freezing evaporator are stopped, and the fluid rich in the low-boiling-point refrigerant is throttled by the second throttling device 109, enters the refrigeration evaporator 110 and the secondary refrigeration evaporator 114 in sequence to absorb heat, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Up to the temperature t of the first-stage refrigerating chamberRⅠBelow a set minimum temperature tRⅠminAnd the second stage refrigerating chamber temperature tRⅡBelow a set minimum temperature tRⅡminAnd the fans corresponding to the refrigerating evaporator and the secondary refrigerating evaporator are stopped.
When the temperature of the primary refrigerating chamber is monitored to be lower than the set minimum temperature tRⅠminAnd the temperature of the secondary refrigerating chamber is lower than the set minimum temperature tRⅡminFreezing chamber temperature tFAbove a set maximum temperature tFmaxTemperature t of variable temperature chamberVBelow a set minimum temperature tVminWhen the temperature of the refrigerant is lower than the preset temperature, the three-way valve 108 is in the state 2, the freezing flow path switching mechanism 117 is in the state 1 (state communicated with the freezing evaporator), the temperature-changing flow path switching mechanism 118 is in the state 2 (state communicated with the temperature-changing branch), the fan corresponding to the freezing evaporator is started, the fans corresponding to the refrigerating evaporator, the temperature-changing evaporator and the secondary refrigerating evaporator are stopped, the fluid rich in the low-boiling-point refrigerant enters the freezing evaporator 112 to absorb heat after being throttled by the third throttling device 111, and then returns to the compressor through the check valve 107 and the heat regenerator 105. When the temperature t of the freezing chamberFBelow a set minimum temperature tFminAnd when the freezing evaporator is started, the fan corresponding to the freezing evaporator is stopped.
When the temperature of the primary refrigerating chamber is monitored to be lower than the set minimum temperature tRⅠminAnd the temperature of the secondary refrigerating chamber is lower than the set minimum temperature tRⅡminFreezing chamber temperature tFLower than a set maximum temperature tFminTemperature t of variable temperature chamberVAbove a set minimum temperature tVmaxIn the meantime, the first flow path switching mechanism 108 is in the state 2, the freezing flow path switching mechanism 117 is in the state 2 (state of communicating with the freezing branch), the variable temperature flow path switching mechanism 118 is in the state 1 (state of communicating with the variable temperature evaporator), and the variable temperature evaporator corresponds to the variable temperature evaporatorThe fan is started, the fans corresponding to the refrigeration evaporator, the freezing evaporator and the secondary refrigeration evaporator are stopped, the fluid rich in the low-boiling-point refrigerant enters the temperature-changing evaporator 113 to absorb heat after being throttled by the third throttling device 111, and then returns to the compressor through the check valve 107 and the heat regenerator 105. When the temperature of the temperature changing chamber is tVBelow a set minimum temperature tVminAnd when the temperature of the air flows to the temperature-changing evaporator, the fan corresponding to the temperature-changing evaporator is stopped.
When the temperature of the primary refrigerating chamber is monitored to be lower than the set minimum temperature tRⅠminAnd the temperature of the secondary refrigerating chamber is lower than the set minimum temperature tRⅡminFreezing chamber temperature tFAbove a set maximum temperature tFmaxTemperature t of variable temperature chamberVAbove a set minimum temperature tVmaxWhen the first flow path switching mechanism 108 is in the state 2, the freezing flow path switching mechanism 117 is in the state 1, the temperature-varying flow path switching mechanism 118 is in the state 1, the fans corresponding to the freezing evaporator and the temperature-varying evaporator are started, the fans corresponding to the refrigerating evaporator and the two-stage refrigerating evaporator are stopped, and the fluid rich in the low-boiling-point refrigerant is throttled by the third throttling device 111, enters the freezing evaporator 112 and the temperature-varying evaporator 113 in sequence to absorb heat, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Up to the freezer temperature tFBelow a minimum set temperature tFminAnd temperature t of variable temperature chamberVBelow a set minimum temperature tVminAnd stopping the fans corresponding to the freezing evaporator and the temperature-changing evaporator.
And the refrigerating chamber is controlled preferentially.
In the process of cooling the freezing chamber and the temperature-changing chamber, the temperature of the refrigerating chamber is continuously monitored once the temperature t of the first-level refrigerating chamberRⅠAbove a set maximum temperature tRⅠmaxOr secondary refrigerating chamber temperature tRⅡAbove a set maximum temperature tRⅡmaxThe three-way valve 108 switches to state 1.
EXAMPLE III
The present embodiment includes three evaporators in parallel, including three low temperature storage compartments corresponding to the three evaporators. Of course, the number of evaporator flow paths can be determined according to actual requirements.
Specifically, the present embodiment includes a refrigeration evaporator 110, a freezing evaporator 112, and a temperature-varying evaporator 113, where the refrigeration evaporator 110 corresponds to a refrigerating chamber, the freezing evaporator 112 corresponds to a freezing chamber, and the temperature-varying evaporator 113 corresponds to a temperature-varying chamber.
As shown in fig. 5, the first flow path switching mechanism of the present embodiment includes two-stage three-way valves, specifically, a one-stage three-way valve 120 and a two-stage three-way valve 121. An inlet of the first-stage three-way valve 120 is connected with a first pipeline outlet of the heat regenerator 105, a first outlet of the first-stage three-way valve 120 is connected with a refrigerating evaporator inlet flow path, a second outlet of the first-stage three-way valve 120 is connected with an inlet of the second-stage three-way valve 121, a first outlet of the second-stage three-way valve 121 is connected with a freezing evaporator inlet flow path, and a second outlet of the second-stage three-way valve 121 is connected with a temperature-changing evaporator inlet flow path.
And a controller for controlling the compressor and the first flow path switching mechanism. Specifically, the controller controls the start-stop and operation frequency of the compressor according to the relationship between the set temperature of the low-temperature storage chamber and the actual temperature detected by the temperature detection module, controls the first-stage three-way valve 120 to be connected with the inlet flow path of the refrigeration evaporator or the second-stage three-way valve 121, and controls the second-stage three-way valve 121 to be connected with the inlet flow path of the refrigeration evaporator or the inlet flow path of the variable-temperature evaporator.
The controller is used for controlling the starting of the fan corresponding to the evaporator when the actual temperature of the low-temperature storage chamber corresponding to the evaporator is higher than the highest set temperature; the controller is used for controlling the fan that the evaporimeter corresponds to shut down when the actual temperature of the low temperature storeroom that the evaporimeter corresponds is less than minimum set temperature.
Specifically, the working process of the refrigeration equipment is as follows:
when the temperature t of the refrigerating chamber is monitoredRAbove a set maximum temperature tRmaxWhen the temperature is higher than the set temperature, the first-stage three-way valve 120 is in the state 1 (the state of being communicated with the inlet flow path of the refrigeration evaporator), the fan corresponding to the refrigeration evaporator 110 is started, the fans corresponding to the freezing evaporator 112 and the temperature-changing evaporator 113 are stopped, and the fluid rich in the low-boiling-point refrigerant enters the refrigeration evaporator 110 to absorb heat after being throttled by the second throttling device 109, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Until the refrigerating chamber temperature t is monitoredRBelow a set minimum temperature tRminAt this time, the fan corresponding to the refrigeration evaporator 110 is stopped.
When the temperature t of the refrigerating chamber is monitoredRBelow a set minimum temperature tRminAnd the temperature t of the freezing chamberFAbove a set maximum temperature tFmaxWhen the refrigerant is in the state 2 (the state of being communicated with the secondary three-way valve 121), the secondary three-way valve 121 is in the state 1 (the state of being communicated with the flow path of the refrigeration evaporator), the fan corresponding to the refrigeration evaporator 112 is started, the fans corresponding to the refrigeration evaporator 110 and the temperature-changing evaporator 113 are stopped, and the fluid rich in the low-boiling-point refrigerant enters the refrigeration evaporator 112 to absorb heat after being throttled by the third throttling device 111, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Until the temperature t of the freezer compartment is monitoredFBelow a set minimum temperature tFminAnd when the freezing evaporator is started, the fan corresponding to the freezing evaporator is stopped.
When the temperature t of the refrigerating chamber is monitoredRBelow a set minimum temperature tRminFreezing chamber temperature tFBelow a set minimum temperature tFminAnd the temperature t of the temperature-changing chamber is monitoredVAbove a set maximum temperature tVmaxWhen the temperature of the refrigerant is lower than the first temperature, the first three-way valve 120 is in the state 2, the second three-way valve 121 is in the state 2 (the state of being communicated with the inlet flow path of the temperature-changing evaporator), the fan corresponding to the temperature-changing evaporator 113 is started, the fans corresponding to the refrigeration evaporator and the freezing evaporator are stopped, and the fluid rich in the low-boiling-point refrigerant enters the temperature-changing evaporator 113 to absorb heat after being throttled by the third throttling device 119, and then returns to the compressor through the check valve 107 and the heat regenerator 105. Up to the temperature t of the temperature-changing chamberVBelow a minimum set temperature tVminAnd stopping the fan corresponding to the variable temperature evaporator.
With the refrigeration compartment being prioritized and the freezer compartment being the next. In the cooling process of the freezing chamber and the temperature-changing chamber, the temperature t of the refrigerating chamber is continuously monitoredROnce refrigerating compartment temperature tRAbove a set maximum temperature tRmaxThe primary three-way valve 120 switches to state 1. When the temperature of the refrigerating chamber meets the requirement, the temperatures t of the freezing chamber and the temperature-changing chamberF、tVAre all higher than the set maximum temperature tFmax、tVmaxWhile coolingThe freezing chamber is preferentially refrigerated.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A refrigeration appliance comprising:
a low temperature storage chamber and a refrigeration system for supplying cold to the low temperature storage chamber; it is characterized in that the preparation method is characterized in that,
the refrigeration system includes:
a compressor connected with a compressor inlet flow path and a compressor outlet flow path;
a first condenser connected to the compressor outlet flow path and connected to a first condenser outlet flow path;
the gas-liquid separator is connected with the first condenser outlet flow path and is connected with a gas-liquid separator gas outlet flow path and a gas-liquid separator liquid outlet flow path;
a second condenser connected to the gas-liquid separator gas outlet flow path and connected to a second condenser outlet flow path;
the evaporator comprises at least two evaporators connected in parallel, wherein an inlet and an outlet of each evaporator are respectively connected with an evaporator inlet flow path and an evaporator outlet flow path, and a throttling device is arranged on the evaporator inlet flow path;
a regenerator including a first conduit and a second conduit in heat exchange with each other, the first conduit for connecting the second condenser outlet flow path, the second conduit for connecting the compressor inlet flow path and the evaporator outlet flow path;
and the first flow path switching mechanism is used for connecting the first pipeline and a plurality of evaporator inlet flow paths and is used for controllably switching the flowing direction of the refrigerant.
2. The refrigerating apparatus as claimed in claim 1, wherein the evaporator includes a refrigerating evaporator and a freezing evaporator connected in parallel with each other, the refrigerating evaporator for supplying cooling to the refrigerating chamber, the freezing evaporator for supplying cooling to the freezing chamber;
the first flow path switching mechanism is used for controlling the flow direction of the refrigerant to be switched to preferentially flow to the refrigeration evaporator when the refrigeration chamber and the freezing chamber both need refrigeration.
3. The refrigeration appliance according to claim 2,
the evaporator also comprises a variable temperature evaporator, and the variable temperature evaporator is used for providing cold energy for the variable temperature chamber;
the variable temperature evaporator is connected with the freezing evaporator in series, and an inlet of the variable temperature evaporator is connected with an outlet of the freezing evaporator.
4. The refrigeration apparatus as set forth in claim 3 wherein said refrigeration system further includes:
a freezing branch and/or a temperature-changing branch; the freezing branch is connected with the freezing evaporator in parallel, and the temperature-changing branch is connected with the temperature-changing evaporator in parallel;
a freezing flow path switching mechanism for controlled switching of refrigerant flow to the freezing branch or the freezing evaporator;
and the temperature change flow path switching mechanism is used for controllably switching the flow of the refrigerant to the temperature change branch or the temperature change evaporator.
5. The refrigeration appliance according to claim 4,
the freezing flow path switching mechanism is used for controllably switching the refrigerant to flow to the freezing evaporator when the freezing chamber needs refrigeration, and controllably switching the refrigerant to flow to the freezing branch when the freezing chamber does not need refrigeration;
the temperature-changing flow path switching mechanism is used for controlling and switching the refrigerant to flow to the temperature-changing evaporator when the temperature-changing chamber needs to be refrigerated, and controlling and switching the refrigerant to flow to the temperature-changing branch when the temperature-changing chamber does not need to be refrigerated.
6. The refrigeration apparatus as set forth in claim 2 wherein said refrigeration system further includes:
the refrigerating system comprises a secondary refrigerating evaporator, wherein the secondary refrigerating evaporator is used for providing cold energy for a secondary refrigerating chamber, the secondary refrigerating evaporator is connected in series with the refrigerating evaporator, and an inlet of the secondary refrigerating evaporator is connected with an outlet of the refrigerating evaporator.
7. The refrigeration apparatus of claim 6 wherein the refrigeration system further comprises:
a refrigeration branch and/or a secondary refrigeration branch; the refrigerating branch is connected in parallel to the refrigerating evaporator, and the secondary refrigerating branch is connected in parallel to the secondary refrigerating evaporator;
the refrigerating flow path switching mechanism is used for controllably switching the flow of the refrigerant to the refrigerating branch or the refrigerating evaporator;
and the secondary refrigeration flow path switching mechanism is used for controllably switching the flow of the refrigerant to the secondary refrigeration branch or the secondary refrigeration evaporator.
8. The refrigeration appliance according to claim 7,
the refrigerating flow path switching mechanism is used for controlling and switching the refrigerant to flow to the refrigerating evaporator when the refrigerating chamber needs to refrigerate, and controlling and switching the refrigerant to flow to the refrigerating branch when the refrigerating chamber does not need to refrigerate;
the secondary refrigerating flow path switching mechanism is used for controllably switching the flow of the refrigerant to the secondary refrigerating evaporator when the secondary refrigerating chamber needs refrigeration; for controlled switching of refrigerant flow to the secondary refrigeration branch when refrigeration is not required in the secondary refrigeration compartment.
9. A cold appliance according to any of claims 1-8, wherein the cold appliance comprises a fan in correspondence with the evaporator, the fan being adapted to be controlled to be activated when refrigerant flows through the evaporator.
10. The refrigeration apparatus as claimed in any one of claims 1 to 8, wherein the liquid outlet flow path of the gas-liquid separator is connected to the evaporator outlet flow path through a first throttling means; a check valve for preventing a refrigerant from flowing backward to the evaporator is provided in the evaporator outlet flow path.
CN201921991191.7U 2019-11-18 2019-11-18 Refrigerating equipment Active CN211120208U (en)

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Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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CN211120208U true CN211120208U (en) 2020-07-28

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Address after: 266000 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province

Patentee after: Hisense refrigerator Co.,Ltd.

Country or region after: China

Patentee after: XI'AN JIAOTONG University

Address before: No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province

Patentee before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd.

Country or region before: China

Patentee before: XI'AN JIAOTONG University