JP2012017966A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which the thickness distribution of a heat insulation wall of a storage compartment is effectively distributed to reduce entering heat, while reducing power consumption.SOLUTION: The refrigerator includes: a heat insulation box 101; a heat insulation door 119 which opens and closes a front face of an opening of the heat insulation box 101; a storage compartment which is formed of the heat insulation box 101 and the heat insulation door 119; a heater which is provided on the front face of the opening of the heat insulation box; a heat insulation partition wall 121 which partitions the storage compartment into a plurality of compartments; and a machine compartment 107 which stores a compressor and is provided below the heat insulation box 101. The thickness of the heat insulation partition wall 121 is set to be greater than the thickness of the thickest portion in the heat insulation wall covering the machine compartment, thereby reducing heat entering through the heat insulation wall and the heat entering from the opening. As a result, the cooling efficiency is improved to reduce the power to be consumed by the refrigerator.

Description

  The present invention relates to a refrigerator having a high energy saving effect.

  It is well known that the amount of power consumed by refrigerators occupies the top rank among electric appliances in general households. This is because, unlike other electric devices, power is normally continuously supplied for 24 hours. Therefore, in order to save power (energy saving) in ordinary households, it is required to save power in the refrigerator.

  One of the factors that greatly consumes power in the refrigerator is that the temperature inside the cabinet rises due to the intrusion of heat from the outside air through the heat insulating wall of the cabinet (hereinafter referred to as intrusion heat), and the compressor is operated for a long time. It is conceivable to drive at a high frequency. Therefore, the higher the heat insulation performance of the cabinet, the smaller the intrusion heat from the outside air, so that the temperature rise in the cabinet can be suppressed, the compressor operation time can be shortened, or the compressor can be driven at a low frequency. Can be achieved.

  Generally, the cabinet has a configuration in which a heat insulating material such as urethane foam is foam-filled between an inner box and an outer box. It is well known that the heat insulating performance increases as the thickness of the heat insulating material (heat insulating wall thickness) simply increases, and the heat insulating wall thickness is increased in order to reduce intrusion heat. In particular, the greater the difference between the temperature around the cabinet and the temperature in the storage room, the greater the heat insulation wall thickness, the greater the effect of reducing intrusion heat, and the power can be saved.

  On the other hand, since the size of the kitchen itself and the size of kitchen equipment in ordinary houses are standardized to some extent, the size of the installation space for installing the refrigerator is also limited to some extent.

  Furthermore, due to the social situation such as the increase in refrigerated and frozen foods due to recent food changes and the increase in working housewives, the storage capacity of general household refrigerators tends to increase.

  Therefore, to simply save power, increasing the insulation wall thickness is against the customer's needs, and does not increase the external dimensions of the refrigerator. It is necessary.

  FIG. 23 is a longitudinal sectional view of a basic structure of a storage room adjacent to a machine room of a conventional refrigerator. Insulating doors are omitted.

  As shown in FIG. 23, a heat insulating box 2 is partitioned into a plurality of storage chambers by a heat insulating partition wall 1, and a storage case 3 for storing food is provided in each storage chamber.

  In addition, a machine room 5 for arranging devices such as the compressor 4 is formed on the lower rear surface of the heat insulation box 2, and since the compressor 4 and the like generate heat during operation, the machine room 5 has a heat insulation box. It becomes hotter than the other part of 2 outside. Therefore, the heat insulating wall thickness 6 covering the machine room 5 where the temperature difference from the storage room becomes large is set to be the largest. On the other hand, since it is heat insulation between adjacent storage chambers and becomes smaller than the temperature difference from the outside of the heat insulation box 2, the heat insulation wall thickness of the heat insulation partition wall 1 is set to be the smallest.

In general, as described above, on the premise of maintaining the external dimensions and storage volume of the refrigerator, the heat insulation wall thickness of the heat insulation box is distributed by the temperature difference between the outside and the storage room, and the intrusion heat is efficiently reduced. Thus, power saving is achieved (see, for example, Patent Document 1).

JP 2006-200774 A

  However, the conventional refrigerator has room for improvement in order to satisfy the demand for power saving.

  Generally, cold air leaks to the outside between the front opening formed by the heat insulating partition wall that insulates adjacent storage chambers, the side heat insulating wall and the bottom heat insulating wall of the storage chamber, and the heat insulating door. A door gasket is provided to prevent this. Since the metal receiving member for tightly attaching the door gasket crosses the outside of the storage chamber on the front surface of the heat insulating partition wall forming these openings, the heat of the outside air is stored by the heat conduction of the metal receiving member. Enter the room directly. For this reason, if the wall thickness of the heat insulating partition wall constituting the opening is small, the main flow of cold air that circulates in the storage chamber reaches the vicinity of the high temperature metal receiving member, so the heat transfer coefficient between the metal receiving member and the cold air increases. As a result, the intrusion heat increases, which is one of the factors that consume a lot of power.

  In particular, when a heating means for making the outer box surface higher than the outside air (in order to make the dew point higher) in order to prevent condensation on the surface of the outer box on the metal receiving part, The outside air around the refrigerator is warmed more than usual through the surface of the heated outer box. As a result, the temperature difference between the outside air and the storage chamber further increases, so that the intrusion heat increases, which is one of the factors that consumes a large amount of power.

  Therefore, on the premise of maintaining the external dimensions and storage volume of the refrigerator, not only heat intrusion through the heat insulating wall, that is, not only the temperature difference from the outside air, but also a heating means for preventing condensation is arranged. Even in the case, it is necessary to appropriately distribute the heat insulating wall thickness so that power can be saved comprehensively in consideration of intrusion heat from the opening.

  In order to solve the conventional problems, the refrigerator of the present invention is a storage formed by a heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, and the heat insulating box and the heat insulating door. A storage room, a heat insulating partition wall that divides the storage room into a plurality of storage rooms, and a machine room provided in a lower part of the heat insulating box for storing the compressor, and maintaining the external dimensions and storage volume of the refrigerator As a premise, not only heat intrusion through the heat insulation wall, that is, not only the temperature difference from the outside air, but also the heat intrusion from the opening is taken into account even when heating means to prevent condensation is provided However, the heat insulating wall thickness is distributed so that power saving can be achieved comprehensively.

  The refrigerator of the present invention can provide a refrigerator that reduces the intrusion heat from the outside air, improves the cooling efficiency, and saves power.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The longitudinal cross-sectional view of the basic structure of the storage room which adjoins the machine room of the refrigerator in Embodiment 1 of this invention The front view of the basic structure of the storage room adjacent to the machine room of the refrigerator in Embodiment 1 of this invention The heat insulation door upper part expanded sectional view of the storage room adjacent to the machine room of the refrigerator in Embodiment 1 of this invention. General relationship between heat penetration and insulation wall thickness Relationship diagram between the amount of intrusion heat and the heat insulation wall thickness ratio in Embodiment 1 of the present invention The longitudinal cross-sectional view of the basic structure of the storage room adjacent to the machine room of the refrigerator in Embodiment 2 of this invention Front view of basic structure of storage room adjacent to machine room of refrigerator in embodiment 2 of the present invention The heat insulation door lower part expanded sectional view of the storage room adjacent to the machine room of the refrigerator in Embodiment 2 of this invention Relationship diagram between intrusion heat quantity and heat insulation wall thickness ratio in Embodiment 2 of the present invention The longitudinal cross-sectional view of the basic structure of the storage room adjacent to the machine room of the refrigerator in Embodiment 3 of this invention Front view of basic structure of storage room adjacent to machine room of refrigerator in embodiment 3 of the present invention The heat insulation door lower part expanded sectional view of the storage room adjacent to the machine room of the refrigerator in Embodiment 3 of this invention Relationship diagram between intrusion heat quantity and heat insulation wall thickness ratio in Embodiment 2 of the present invention Plan sectional drawing of the basic structure of the storage room adjacent to the machine room of the refrigerator in Embodiment 4 of this invention Front view of basic structure of storage room adjacent to machine room of refrigerator in embodiment 4 of the present invention The insulated door side part expanded sectional view of the storage room adjacent to the machine room of the refrigerator in Embodiment 4 of this invention Relationship diagram between intrusion heat quantity and heat insulation wall thickness ratio in Embodiment 4 of the present invention Plan sectional drawing of the basic structure of the storage room adjacent to the machine room of the refrigerator in Embodiment 5 of this invention Front view of basic structure of storage room adjacent to machine room of refrigerator in embodiment 5 of the present invention The insulated door side part expanded sectional view of the storage room adjacent to the machine room of the refrigerator in Embodiment 5 of this invention Relationship diagram of intrusion heat quantity and heat insulation wall thickness ratio in Embodiment 5 of the present invention A longitudinal sectional view of the basic structure of a storage room adjacent to the machine room of a conventional refrigerator

  1st invention is a heat insulation box, the heat insulation door which opens and closes the opening front part of the said heat insulation box, the storage room formed with the said heat insulation box and the said heat insulation door, and the said storage room is stored in several A heat insulating partition wall partitioned into a chamber, and a machine room provided at a lower portion of the heat insulating box housing the compressor, and the wall thickness of the heat insulating partition wall is within the heat insulating wall covering the machine room. By making it larger than the wall thickness of the largest part, the amount of the total heat insulating material to be used is reduced under a constant condition, and the amount of the heat insulating material of the heat insulating wall covering the machine room is reduced. In this case, it is possible to increase the distance between the main flow of the cold air circulating in the storage chamber in the vicinity of the metal receiving member that becomes high temperature due to the influence of the outside air, the heat transfer coefficient of the metal receiving member and the cold air is reduced, and the heat insulation The intrusion heat from the opening on the front of the partition wall can be reduced, and the penetration through the heat insulation wall Comprehensively reduce the heat intrusion from the heat and the openings, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

2nd invention is a heat insulation box, the heat insulation door which opens and closes the opening front part of the heat insulation box, the storage room formed with the heat insulation box and the heat insulation door, and the storage room is stored in plural A heat insulating partition wall partitioned into a chamber, and a machine room provided at a lower portion of the heat insulating box that houses the compressor, wherein the wall thickness of the heat insulating partition wall faces the front and rear direction of the machine room. By making the wall thickness larger than the wall thickness, the amount of the total heat insulating material to be used is constant, and the amount of the heat insulating wall facing the machine room in the front-rear direction is reduced. Since the distance between the main flow of the cold air circulating in the storage chamber in the vicinity of the metal receiving member that becomes high temperature under the influence of outside air in the section can be increased, the heat transfer coefficient of the metal receiving member and the cold air is reduced, Intrusion heat from the opening near the heat insulation partition wall can be reduced, and Heat entering Te and comprehensively reduce the heat intrusion from the opening, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  3rd invention is a heat insulation box body, the heat insulation door which opens and closes the opening front part of the said heat insulation box body, the storage room formed with the said heat insulation box body and the said heat insulation door, The said storage room is stored in several A heat insulating partition wall partitioned into a chamber, and a machine room provided at a lower portion of the heat insulating box housing the compressor, and the wall thickness of the heat insulating partition wall is within the heat insulating wall covering the machine room. By making it larger than the wall thickness of the heat insulation wall that does not have a through passage, the amount of the total heat insulation to be used is constant, and the heat insulation of the heat insulation wall that does not have a through passage within the heat insulation wall that covers the machine room. By reducing the amount, it is possible to increase the distance from the main stream of the cold air circulating in the storage chamber in the vicinity of the metal receiving member that becomes hot due to the influence of outside air at the opening in the front surface of the heat insulating partition wall. The heat transfer coefficient between the member and the cold air is reduced, and the heat from the opening near the heat insulating partition wall is reduced. Can be reduced heat input, comprehensively reduce the heat intrusion from entering heat and opening through the insulating wall, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  4th invention is a heat insulation box body, the heat insulation door which opens and closes the opening part front surface of the said heat insulation box body, the storage room formed with the said heat insulation box body and the said heat insulation door, and the said storage room is stored in several A heat insulating partition wall partitioned into a chamber, and a machine room provided at a lower portion of the heat insulating box that houses the compressor, the wall thickness of the heat insulating partition wall facing the storage chamber side of the machine room By making the wall thickness of the heat insulating wall larger than the wall thickness of the heat insulating wall to be used, the amount of the heat insulating wall facing the storage room side of the machine room is reduced under a constant condition of the amount of the total heat insulating material to be used. The distance between the metal receiving member and the cold air circulating in the storage chamber in the vicinity of the metal receiving member that becomes hot due to the influence of outside air at the opening on the front surface of the wall can be increased. Intrusion heat from the opening near the heat insulating partition wall. Comprehensively reduce the heat intrusion from entering heat and opening through the insulating wall, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  5th invention provides the heating means in the opening front part of the said heat insulation box in the invention as described in any one of Claim 1 to 4, The surface of the outer box heated by the heating means The outside air around the refrigerator will be warmed more than usual, and the temperature difference between the outside air and the storage chamber will increase and the intrusion heat will increase, but the intrusion heat through the heat insulating wall and the intrusion from the opening will increase. A refrigerator that can reduce heat comprehensively, improve cooling efficiency, and save power can be provided.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, since the storage room is a freezing room, the temperature is low, and the temperature difference between the outside air and the outside air is the largest, further reducing. It is possible to provide a refrigerator that is more effective, improves cooling efficiency, and saves power.

  A seventh invention is the invention according to any one of claims 1 to 6, wherein the wall thickness of the heat insulating wall on the bottom surface forming the storage chamber is maximized among the heat insulating walls covering the machine room. The wall thickness of the insulating wall that does not have a through-passage in the insulating wall that covers the machine room, or the wall thickness of the heat insulating wall that faces the storage chamber side of the machine room, Since the distance from the main stream of the cold air circulating in the storage chamber in the vicinity of the metal receiving member that becomes hot due to the influence of outside air at the opening on the bottom front surface can be increased, the heat transfer coefficient between the metal receiving member and the cold air is increased. It is possible to provide a refrigerator that is reduced in size, can reduce intrusion heat from the opening near the heat insulating wall on the bottom surface, further improves cooling efficiency, and saves power.

  According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the wall thickness of the heat insulating wall on the side surface forming the storage chamber is maximized among the heat insulating walls covering the machine room. The wall thickness of the insulating wall that does not have a through-passage in the insulating wall that covers the machine room, or the wall thickness of the heat insulating wall that faces the storage chamber side of the machine room, Intrusion heat from the opening in the vicinity of the heat insulating wall on the side surface can be reduced, and the refrigerator can be provided with improved cooling efficiency and power saving.

  Hereinafter, the present embodiment will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the above-described embodiment, and the detailed description thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a vertical cross-sectional view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 1 of the present invention. FIG. 3 is a front view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is an enlarged cross-sectional view of the upper part of the heat insulation door of the storage room adjacent to the machine room of the refrigerator in the first embodiment of the present invention.

  In FIG. 1, a heat insulating box 101 of a refrigerator 100 includes an outer box 102 mainly using a steel plate and an inner box 103 molded of a resin such as ABS, and the inside thereof is made of, for example, hard foam urethane or the like. It is filled with foam heat insulating material and insulated from the surroundings, and is partitioned into a plurality of storage chambers 104, 105, 106 by heat insulating partition walls 120, 121.

  Each storage chamber has its front opening closed by heat insulating doors 117, 118, and 119 pivoted to the refrigerator main body.

  For example, assuming that the storage rooms 104, 105, and 106 are a refrigerated room, a vegetable room, and a freezer room, respectively, the refrigerated room is normally set to 1 ° C to 5 ° C at the lower limit for freezing for refrigeration, and the vegetable room is refrigerated The temperature is set to 2 ° C to 7 ° C, which is the same as or slightly higher than that of the room. The freezer compartment is set in a freezing temperature zone, and is usually set at −22 ° C. to −15 ° C. for frozen storage. For improving the frozen storage state, for example, −30 ° C. or −25 ° C. Sometimes set at low temperatures.

  A machine room 107 is formed in the back region of the lowermost storage room 106 of the heat insulation box 101, and the high pressure side components of the refrigeration cycle such as the compressor 108 and a dryer (not shown) for removing moisture are accommodated. .

  In FIG. 2, a cooling chamber 109 for generating cool air is provided on the back surface of the storage chamber 106, and a cooling air conveyance path to each chamber having heat insulation is provided between the storage chambers 106, and each chamber is configured to be insulated from each other. The rear surface partition wall 110 is configured. A cooler 111 is disposed in the cooling chamber 109, and a cooling fan 112 that blows cool air cooled by the cooler 111 to the storage chambers 104, 105, 106 in the upper space of the cooler 111 by a forced convection method. A radiant heater 113 made of glass tube is provided in the lower space of the cooler 111 to defrost frost and ice adhering to the cooler 111 and its surroundings during cooling. A drain pan 114 for receiving defrosted water generated during frost and draining it out of the warehouse by its own weight is formed in the through passage 115, and an evaporating dish 116 is formed outside the warehouse on the downstream side.

A cool air discharge port 124 for supplying the cool air generated by the cooler 111 to the storage chamber 106 by the cooling fan 112 and the inside of the storage chamber 106 are circulated below the cool air discharge port 124 in the back partition wall 110. A cold air inlet 125 for returning the cold air to the cooler 111 is provided.

  In addition, a storage case for storing foods is arranged in the storage chamber 106 while being held and pulled out by a drawer mechanism. In the present embodiment, three storage cases are arranged in the storage chamber 106. Specifically, an upper storage case 126, a middle storage case 127, and a lower storage case 128 are arranged.

  The dimension a is the thickness of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the wall of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107. It is the thickness dimension or the wall thickness dimension of the heat insulating wall where the storage chamber 106 and the machine chamber 107 face each other. The dimension b is the wall thickness dimension of the heat insulating partition wall 121.

  3 and 4, a door gasket 122 is provided over the entire periphery at the end of the inner surface of the heat insulating door 119 (the same applies to the storage chamber 104 and the storage chamber 105), and the storage chamber 105 and the storage chamber 106 are separated from each other. Cold air leaks to the outside by bringing the U-shaped metal receiving portion 123 and the door gasket 122 into close contact with the front surface of the heat-insulating partition wall 121, the outer periphery of which is composed of a resin portion, and extending outside the storage chamber. It is preventing. The metal receiving portion 123 has a horizontal shape and a vertical portion so that the horizontal portion is properly supported by the front surface of the heat insulating partition wall 121 and the vertical portion is in close contact with the door gasket 122. can do. Thereby, the heat penetration | invasion to the storage chamber 105 or the storage chamber 106 can be suppressed.

  Further, by providing a heat intrusion suppressing structure between the metal receiving portion 123 and the storage chamber 106, heat intrusion can be further suppressed.

  Specifically, the heat insulating member 130 is provided directly below the metal receiving portion 123. And the horizontal part of the metal receiving part 123 is located in the upper part of the heat insulation member 130, and it is set as the state pinched by the front part of the heat insulation partition wall 121, and the heat insulating material 130. FIG. Thereby, the heat radiation from the horizontal part of the metal receiving part 123 can be suppressed appropriately. The heat insulating member 130 is held by a resin portion that forms the outer periphery of the heat insulating partition wall 121.

  Here, the b1 dimension is a height dimension including the metal receiving part 123 and its holding part, and the b2 dimension is a height dimension including the heat insulating member 130 and its holding part. The b1 dimension is fixed.

  In the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the insulation wall that does not have the through passage 115 in the insulation wall that covers the storage room 106 and the machine room 107. The wall thickness dimension b (= b1 + b2) of the heat insulating partition wall 121 is made larger than the wall thickness dimension or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other.

  Specifically, in this embodiment, the heat insulation wall thickness dimension a between the storage chamber 106 and the machine room 107 is 60 mm, and the wall thickness dimension b of the heat insulation partition wall 121 is 70 mm (b1 dimension is 49 mm, b2 dimension is 21 mm).

The metal receiving portions 123 on the four sides on the front surface of the opening are configured to contact the end surfaces. Further, the metal receiving portion 123 on the front surface of the heat insulating partition wall 121 has a surface of the metal receiving portion 123 or a surface of the outer box 102 in order to prevent condensation on the surface of the metal receiving portion 123 or the surface of the outer box 102. Is provided with a heating means 135 (in this case, a heat radiating pipe) for making the temperature higher than the outside air (in order to make the temperature higher than the dew point), and is in close contact with the metal receiving portion 123. The heating means 135 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the surfaces of the metal receiving portion 123 and the outer box 102 with the heat.
The heat radiating pipe is an example of the heating means in the present invention.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the flow of cool air in the storage chamber 106 will be described. The cool air cooled by the cooler 111 is forcibly blown from the discharge port 124 to the upper, middle, and lower stages in the storage chamber 106 by the cooling fan 112 that rotates as the motor rotates. The blown-out cool air is blown to the storage cases 126, 127, and 128 to cool the food stored. As shown by the arrows, the cold air that has cooled the foods is the gap between the storage case 126 and the heat insulating partition wall 121 in the upper stage, the gap between the storage case 126 and the storage case 127 in the middle stage, and the storage case 127 and the storage case in the lower stage. The airflow is configured such that the air passes through the gap portions 128, is sucked from the suction port 125 through the gap between the storage case 128 and the inner box bottom wall, and returns to the cooler 111. At this time, the surface of the compressor 108 becomes hot due to heat conduction from the refrigerant that is increased in pressure and heat is generated due to motor loss, mechanical loss, etc., and as a result, the temperature of the machine chamber 107 is higher than that of the surrounding outside air The average is about 10 ° C higher.

  As described above, when the cold air circulates in the storage chamber 106, it is heated by exchanging heat with the surface of the storage chamber. Therefore, power can be saved by reducing the intrusion heat and preventing the temperature rise on the surface of the storage chamber.

  Next, intrusion heat will be described.

  Generally, intrusion heat Q (W) is expressed by the following equation.

Q = K * A * ΔT
K = 1 / (1 / αo + L / λ + 1 / αi)
Here, K is the heat transfer rate (W / m ² K), A is the heat transfer area (m ² ), ΔT is the temperature difference outside the storage chamber (K), and αo is the convective heat transfer rate outside the storage chamber (W / m). ² K), αi is the convective heat transfer coefficient (W / m ² K) in the storage chamber, L is the heat insulation distance (m), and λ is the heat conductivity (W / mK) of the heat insulation part. As can be seen from this equation, it is understood that the intrusion heat Q can be reduced by increasing the heat insulation distance L.

  In particular, with respect to the heat entering from the opening, the heat based on the outside air temperature outside the warehouse moves into the storage chamber 106 by heat conduction through the metal receiving portion 123 and enters the storage chamber 106. Here, since the temperature of the metal receiving portion 123 reaches almost the same as that of the outside air up to the portion extending into the storage chamber, it can be seen that the contribution of the heat insulation distance L, that is, the dimension b2 in FIG. Ignore the term). It can be seen that there is a large amount of intrusion heat when there is no heat insulating member 130 and the b2 dimension is only the thickness of the resin component constituting the outer periphery of the heat insulating partition wall 121 as in the prior art.

  Therefore, when the heating means 135 is provided, heat that moves into the storage chamber 106 due to heat conduction of the metal receiving portion 123 due to heat generated through the outer box 102 by the heating means 135 that is higher than the outside air. Of course, it is also considered that the heat of the heating means 135 moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 to enter the heat.

  FIG. 5 shows the general relationship between the amount of intrusion heat and the heat insulation wall thickness, and FIG. 6 shows the amount of heat intrusion into the refrigerator storage room and the heat insulation wall thickness ratio (b dimension is divided by a dimension) in Embodiment 1 of the present invention. Are shown respectively. The region I indicates a region where a dimension <b dimension.

From FIG. 6, it can be seen that when the b dimension (b2 dimension) is increased, that is, the heat insulating wall thickness of the heat insulating partition wall 121 is increased, the amount of intrusion heat decreases, but increases again at a certain value.
This is based on the premise that the external dimensions and storage volume of the refrigerator are appropriately maintained when the volume efficiency indicating the volume ratio of the storage space to the external shape is 30% to 70%. The larger the heat insulation wall thickness becomes, the smaller the heat insulation wall thickness becomes. If the value of a certain heat insulation wall thickness ratio is exceeded, the intrusion heat amount ΔQ2 from the opening that can be reduced by increasing the b2 dimension and the a dimension are small. This is because the relationship with the amount of intrusion heat ΔQ1 through the heat insulating wall that increases is ΔQ1> ΔQ2.

  In other words, there is a heat insulation wall thickness ratio that minimizes the amount of intrusion heat under the precondition that the external dimensions and the storage volume of the refrigerator are maintained. At that time, a dimension <b dimension can be established from FIG. I understand.

  Therefore, as in the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face in the front-rear direction, or the through-passage 115 is provided in the heat insulation wall covering the storage room 106 and the machine room 107. The heating means 135 is arranged by making the wall thickness dimension b of the heat insulation partition wall 121 larger than the wall thickness dimension of the heat insulation wall that is not or the wall thickness dimension a of the heat insulation wall where the storage chamber 106 and the machine room 107 face each other. Even in such a case, the intrusion heat through the heat insulating wall and the intrusion heat from the opening can be reduced comprehensively.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage chamber formed by the heat insulating box body 101 and the heat insulating door 119, The heating means 135 provided in front of the opening of the heat insulating box, the heat insulating partition wall 121 that partitions the storage chamber into a plurality of storage chambers, and the machine provided in the lower portion of the heat insulating box 101 that stores the compressor A heat insulating partition wall 121, a heat insulating wall thickness where the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or a heat insulating wall covering the storage room 106 and the machine room 107. Even in the case where the heating means is provided by making the wall thickness of the heat insulation wall not having the through passage 115 or larger than the wall thickness of the heat insulation wall where the storage chamber 106 and the machine room 107 face each other, the heat insulation is provided. Intrusion heat through walls and through openings The overall reduction, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  Further, since the intrusion heat can be reduced and the temperature rise on the surface of the storage chamber can be prevented, the cool air circulates at a low temperature, so that the temperature distribution in the entire storage chamber 106 can be kept uniform.

  Further, the wall thickness of the heat insulating partition wall 121 is not necessarily constant in the depth direction of the storage room, that is, only the wall thickness of the heat insulating partition wall 121 near the opening is stored in the storage room 106 and the machine room 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Even if the heat insulation wall thickness is made larger than the wall thickness of the heat insulation wall, the same effect can be obtained.

  In addition, the heat insulation wall thickness dimension shown in this Embodiment is an example, and this invention is not limited to this dimension.

(Embodiment 2)
FIG. 7 is a longitudinal cross-sectional view of the basic structure of a storage room adjacent to the machine room of the refrigerator in Embodiment 2 of the present invention. FIG. 8 is a front view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 2 of the present invention. FIG. 9 is an enlarged sectional view of the lower part of the heat insulation door of the storage room adjacent to the machine room of the refrigerator in the second embodiment of the present invention.

  As shown in FIG. 7, the dimension c is the insulation wall thickness dimension of the bottom insulation wall 133 of the storage chamber 106.

  As shown in FIGS. 8 and 9, a metal receiving portion 123 and a door gasket 122 provided so as to cross the outside of the storage chamber are brought into close contact with the front surface of the bottom heat insulating wall 133 to prevent cold air from leaking to the outside.

  Further, the folded flange portion of the metal receiving portion 123 is embedded in the heat insulating box 101.

  Further, heating means 135 (herein, a heat radiating pipe) is provided between the metal receiving portion 123 and the inner box 103 in order to prevent the surface of the metal receiving portion 123 from contacting the outside air and the surface of the outer box 102. Is disposed and is in close contact with the metal receiving portion 123. The heating means 135 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the surfaces of the metal receiving portion 123 and the outer box 102 with the heat.

  The heat radiating pipe is an example of the heating means in the present invention.

  Further, the metal receiving portions 123 on the four sides on the front surface of the opening are configured so as to contact the end surfaces.

  Here, the c1 dimension is the height dimension from the bottom surface of the outer box 102 to the folded tip of the metal receiving part 123, and the c2 dimension is the height dimension from the folded flange end of the metal receiving part 123 to the storage chamber 106, that is, the heat insulation distance. It is. The c1 dimension is fixed.

  In the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the insulation wall that does not have the through passage 115 in the insulation wall that covers the storage room 106 and the machine room 107. The wall thickness dimension b (= b1 + b2) of the heat insulating partition wall 121 is larger than the wall thickness dimension or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage room 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing each other in the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107. The thermal insulation wall thickness dimension c (= c1 + c2) of the bottom thermal insulation wall 133 is made larger than the wall thickness dimension a of the thermal insulation wall facing each other.

  Specifically, in this embodiment, the heat insulation wall thickness dimension a between the storage chamber 106 and the machine room 107 is 60 mm, and the wall thickness dimension b of the heat insulation partition wall 121 is 70 mm (b1 dimension is 49 mm, b2 dimension is 21 mm), the heat insulation wall thickness dimension c of the bottom heat insulation wall 133 is 71 mm (c1 dimension is 41 mm, c2 dimension is 30 mm).

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. In addition, description about the operation | movement similar to Embodiment 1 and an effect | action is abbreviate | omitted.

  In the second embodiment, regarding the heat entering the storage chamber, the metal receiving portion 123 is caused by heat based on the outside air temperature outside the warehouse and heat generated through the outer box 102 by the heating means 135 that is higher than the outside air. In addition to the heat that moves into the storage chamber 106 due to the heat conduction of the metal, it is also considered that the heat of the heating means 135 moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 and enters. It is a thing.

  At the bottom surface of the opening, the temperature is almost equal to that of the heating means 135 up to the end of the folded flange of the metal receiving portion 123, so that it can be seen that the contribution of the heat insulation distance, that is, the dimension c2 in FIG. It can be seen that the c2 dimension is small in the wall thickness of the bottom heat insulating wall 133 that is set only by the temperature difference between the outside and the inside of the storage chamber as in the prior art, that is, the heat insulating distance is small, and the amount of intrusion heat is very large.

  FIG. 10 shows the relationship between the amount of heat entering the storage room of the refrigerator and the heat insulation wall thickness ratio (value obtained by dividing the average value of b and c dimensions by the a dimension) in Embodiment 2 of the present invention. is there. Region I indicates a region where a dimension <b dimension and a dimension <c dimension.

  From this, it can be seen that when the heat insulation wall thickness ratio is increased, the amount of heat penetration decreases, but increases again at a certain value. That is, when the volumetric efficiency indicating the volume ratio of the storage space with respect to the external shape is 30% to 70%, the heat insulating wall thickness that minimizes the amount of intrusion heat under the precondition that the external dimensions and storage volume of the refrigerator are appropriately maintained. That is, a ratio exists, and a dimension <b dimension and a dimension <c dimension hold. In particular, in the present embodiment, the heating means 135 is disposed between the metal receiving portion 123 and the inner box 103 so as to be in close contact with the metal receiving portion 123, thereby appropriately holding the heating means 135. However, the distance of the c1 dimension can be shortened and the dc dimension can be increased, and the ratio of the c1 dimension to the c dimension can be ensured at least 20%. Accordingly, not only heat that moves into the storage chamber 106 due to heat conduction of the metal receiving portion 123 through the outside air, but also heat that moves into the storage chamber 106 through the metal receiving portion 123 generated from the heating means 135 can be reduced. In the state where the influence of heat penetration into the inside is suppressed, dew condensation can be prevented efficiently.

  Therefore, as in the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face in the front-rear direction, or the through-passage 115 is provided in the heat insulation wall covering the storage room 106 and the machine room 107. The wall thickness dimension b of the heat insulating partition wall 121 is larger than the wall thickness dimension of the heat insulating wall that is not, or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage chamber 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing each other in the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107. Even when a heating means is provided by making the heat insulation wall thickness dimension c of the bottom heat insulation wall 133 larger than the wall thickness dimension a of the heat insulation wall facing each other, intrusion heat and opening through the heat insulation wall Low intrusion heat from It can be.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage chamber formed by the heat insulating box body 101 and the heat insulating door 119, The heating means 135 provided in front of the opening of the heat insulating box, the heat insulating partition wall 121 that partitions the storage chamber into a plurality of storage chambers, and the machine provided in the lower portion of the heat insulating box 101 that stores the compressor Chamber 107, and the wall thickness of the heat insulating partition wall 121 and the wall thickness of the bottom heat insulating wall 133 of the storage chamber 106, the heat insulating wall thickness where the storage chamber 106 and the machine chamber 107 face each other in the front-rear direction, or storage. Heating by making the wall thickness of the heat insulation wall that does not have the through passage 115 in the heat insulation wall covering the chamber 106 and the machine room 107 or larger than the wall thickness of the heat insulation wall facing the storage room 106 and the machine room 107. Even when means are arranged, Heat entering through the hot wall and comprehensively reduce the heat intrusion from the opening, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  Further, since the intrusion heat can be reduced and the temperature rise on the surface of the storage chamber can be prevented, the cool air circulates at a low temperature, so that the temperature distribution in the entire storage chamber 106 can be kept uniform.

  Further, the wall thickness of the bottom heat insulating wall 133 is not necessarily constant in the depth direction of the storage room, that is, only the wall thickness of the bottom heat insulating wall 133 near the opening is the storage room 106 and the machine room 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Even if it is larger than the wall thickness of the heat insulation wall, the same effect can be obtained.

  In addition, the heat insulation wall thickness dimension shown in this Embodiment is an example, and this invention is not limited to this dimension.

(Embodiment 3)
FIG. 11 is a longitudinal sectional view of a basic structure of a storage room adjacent to the machine room of the refrigerator according to Embodiment 3 of the present invention. FIG. 12 is a front view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 3 of the present invention. FIG. 13 is an enlarged sectional view of the lower part of the heat insulating door of the storage room adjacent to the machine room of the refrigerator in the third embodiment of the present invention.

  As shown in FIG. 11, the c dimension is a heat insulation wall thickness dimension of the bottom heat insulation wall 133 of the storage chamber 106.

  As shown in FIGS. 12 and 13, a metal receiving portion 123 and a door gasket 122 provided so as to cross the outside of the storage chamber are brought into close contact with the front surface of the bottom heat insulating wall 133 to prevent cold air from leaking to the outside.

  Further, the folded flange portion of the metal receiving portion 123 is embedded in the heat insulating box 101.

  Further, heating means 135 (herein, a heat radiating pipe) is provided between the metal receiving portion 123 and the inner box 103 in order to prevent the surface of the metal receiving portion 123 from contacting the outside air and the surface of the outer box 102. Is disposed and is in close contact with the outer box 102. The heating means 135 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the surfaces of the metal receiving portion 123 and the outer box 102 with the heat.

  The heat radiating pipe is an example of the heating means in the present invention.

  Further, the metal receiving portions 123 on the four sides on the front surface of the opening are configured so as to contact the end surfaces.

  Here, the c1 dimension is the height dimension from the bottom surface of the outer box 102 to the folded tip of the metal receiving part 131, and the c2 dimension is the height dimension from the folded flange part tip of the metal receiving part 123 to the storage chamber 106, that is, the heat insulation distance. It is. The c1 dimension is fixed.

  In the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the insulation wall that does not have the through passage 115 in the insulation wall that covers the storage room 106 and the machine room 107. The wall thickness dimension b (= b1 + b2) of the heat insulating partition wall 121 is larger than the wall thickness dimension or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage room 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing each other in the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107. The thermal insulation wall thickness dimension c (= c1 + c2) of the bottom thermal insulation wall 133 is made larger than the wall thickness dimension a of the thermal insulation wall facing each other.

  Specifically, in this embodiment, the heat insulation wall thickness dimension a between the storage chamber 106 and the machine room 107 is 60 mm, and the wall thickness dimension b of the heat insulation partition wall 121 is 70 mm (b1 dimension is 49 mm, b2 dimension is 21 mm), the heat insulation wall thickness dimension c of the bottom heat insulation wall 133 is 71 mm (c1 dimension is 41 mm, c2 dimension is 30 mm).

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. Note that description of operations and actions similar to those in Embodiment 1 or 2 is omitted.

In the third embodiment, regarding the heat entering the storage chamber, the metal receiving portion 123 is caused by heat based on the outside air temperature outside the warehouse and heat generated through the outer box 102 by the heating means 135 that is higher than the outside air. In addition to the heat that moves into the storage chamber 106 due to the heat conduction of the metal, it is also considered that the heat of the heating means 135 moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 and enters. It is a thing.

  At the bottom surface of the opening, the temperature is almost equal to that of the heating means 135 up to the end of the folded flange of the metal receiving portion 123, so that it can be seen that the contribution of the heat insulation distance, that is, the dimension c2 in FIG. It can be seen that the c2 dimension is small in the wall thickness of the bottom heat insulating wall 133 that is set only by the temperature difference between the outside and the inside of the storage chamber as in the prior art, that is, the heat insulating distance is small, and the amount of intrusion heat is very large.

  FIG. 14 shows the relationship between the amount of heat entering the storage room of the refrigerator and the heat insulation wall thickness ratio (value obtained by dividing the average value of b and c dimensions by the a dimension) in Embodiment 3 of the present invention. is there. Region I indicates a region where a dimension <b dimension and a dimension <c dimension.

  From this, it can be seen that when the heat insulation wall thickness ratio is increased, the amount of heat penetration decreases, but increases again at a certain value. That is, when the volumetric efficiency indicating the volume ratio of the storage space with respect to the external shape is 30% to 70%, the heat insulating wall thickness that minimizes the amount of intrusion heat under the precondition that the external dimensions and storage volume of the refrigerator are appropriately maintained. That is, a ratio exists, and a dimension <b dimension and a dimension <c dimension hold. In particular, in the present embodiment, the heating means 135 is disposed between the folded flange portion of the metal receiving portion 123 and the outer box 102 so as to be in close contact with the outer box. The distance of the c1 dimension can be shortened and the d2 dimension can be lengthened while being held at the same distance, and the ratio of the c1 dimension to the c dimension can be secured at least 20%. Thereby, not only the heat that moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 through the outside air, but also the heat that moves into the storage chamber 106 through the metal receiving portion 123 generated from the heating means 135 can be reduced. Therefore, it is possible to prevent condensation more efficiently in a state where the influence of heat penetration into the inside is suppressed. Further, since the heating means 135 is in close contact with the outer box 102, the assembly is easy and the dimensions can be maintained with high accuracy.

  Therefore, as in the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face in the front-rear direction, or the through-passage 115 is provided in the heat insulation wall covering the storage room 106 and the machine room 107. The wall thickness dimension b of the heat insulating partition wall 121 is larger than the wall thickness dimension of the heat insulating wall that is not, or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage chamber 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing each other in the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107. Even when a heating means is provided by making the heat insulation wall thickness dimension c of the bottom heat insulation wall 133 larger than the wall thickness dimension a of the heat insulation wall facing each other, intrusion heat and opening through the heat insulation wall Low intrusion heat from It can be.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage chamber formed by the heat insulating box body 101 and the heat insulating door 119, The heating means 135 provided in front of the opening of the heat insulating box, the heat insulating partition wall 121 that partitions the storage chamber into a plurality of storage chambers, and the machine provided in the lower portion of the heat insulating box 101 that stores the compressor Chamber 107, and the wall thickness of the heat insulating partition wall 121 and the wall thickness of the bottom heat insulating wall 133 of the storage chamber 106, the heat insulating wall thickness where the storage chamber 106 and the machine chamber 107 face each other in the front-rear direction, or storage. Heating by making the wall thickness of the heat insulation wall that does not have the through passage 115 in the heat insulation wall covering the chamber 106 and the machine room 107 or larger than the wall thickness of the heat insulation wall facing the storage room 106 and the machine room 107. Even when means are arranged, Heat entering through the hot wall and comprehensively reduce the heat intrusion from the opening, the cooling efficiency is improved, it is possible to provide a refrigerator which is power saving.

  Further, since the intrusion heat can be reduced and the temperature rise on the surface of the storage chamber can be prevented, the cool air circulates at a low temperature, so that the temperature distribution in the entire storage chamber 106 can be kept uniform.

  Further, the wall thickness of the bottom heat insulating wall 133 is not necessarily constant in the depth direction of the storage room, that is, only the wall thickness of the bottom heat insulating wall 133 near the opening is the storage room 106 and the machine room 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Even if it is larger than the wall thickness of the heat insulation wall, the same effect can be obtained.

  In addition, the heat insulation wall thickness dimension shown in this Embodiment is an example, and this invention is not limited to this dimension.

(Embodiment 4)
FIG. 15 is a plan cross-sectional view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 4 of the present invention. FIG. 16 is a front view of the basic structure of the storage room adjacent to the machine room of the refrigerator according to Embodiment 4 of the present invention. FIG. 17 is an enlarged cross-sectional view of the heat insulation door side portion of the storage room adjacent to the machine room of the refrigerator according to Embodiment 4 of the present invention.

  As shown in FIG. 15, the dimension d is a heat insulation wall thickness dimension of the side heat insulation wall 134 of the storage chamber 106.

  As shown in FIGS. 16 and 17, the metal gasket 123 and the door gasket 122, which are integrally formed with the outer box 102, are brought into close contact with the front surface of the side heat insulating wall 134 so as to cross the outside of the storage chamber, so that the cold air is exposed outside. Prevents leakage.

  Further, the folded flange portion of the metal receiving portion 123 is embedded in the heat insulating box 101.

  Further, heating means 135 (herein, a heat radiating pipe) is provided between the metal receiving portion 123 and the inner box 103 in order to prevent the surface of the metal receiving portion 123 from contacting the outside air and the surface of the outer box 102. Is disposed and is in close contact with the metal receiving member 123. The heating means 135 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the surfaces of the metal receiving portion 123 and the outer box 102 with the heat.

  The heat radiating pipe is an example of the heating means in the present invention.

  Further, the metal receiving portions 123 on the four sides on the front surface of the opening are configured so as to contact the end surfaces.

  Here, the dimension d1 is the width dimension from the side surface of the outer box 102 to the end of the metal funnel 123, and the dimension d2 is the width dimension from the front end of the metal receiver 123 to the storage chamber 106, that is, the heat insulation distance. . The d1 dimension is fixed.

In the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the insulation wall that does not have the through passage 115 in the insulation wall that covers the storage room 106 and the machine room 107. The wall thickness dimension b or the wall thickness dimension b (= b1 + b2) of the heat insulating partition wall 121 is larger than the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other. Is the thickness dimension of the heat insulating wall facing the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107 The heat insulation wall thickness dimension c (= c1 + c2) of the bottom heat insulation wall 133 is larger than the wall thickness dimension a of the heat insulation wall facing each other, and the heat insulation wall thickness dimension where the storage chamber 106 and the machine room 107 face in the front-rear direction, or Storage room 106 and Heat insulation of the side heat insulation wall 134 from the wall thickness dimension of the heat insulation wall that does not have the through passage 115 in the heat insulation wall covering the machine room 107 or the wall thickness dimension a of the heat insulation wall where the storage room 106 and the machine room 107 face each other. The wall thickness dimension d (= d1 + d2) is increased.

  Specifically, in this embodiment, the heat insulation wall thickness dimension a between the storage chamber 106 and the machine room 107 is 60 mm, and the wall thickness dimension b of the heat insulation partition wall 121 is 70 mm (b1 dimension is 49 mm, b2 dimension is 21 mm), the heat insulating wall thickness c of the bottom heat insulating wall 133 is 71 mm (c1 is 41 mm, c2 is 30 mm), and the heat insulating wall thickness d of the side heat insulating wall 134 is 65 mm (d1 is 20 mm, d2 is 45 mm). It is.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. In addition, description about the operation | movement and effect | action similar to Embodiment 1 or 2 or 3 is abbreviate | omitted.

  In the fourth embodiment, regarding the heat entering the storage chamber, the metal receiving portion 123 is caused by heat based on the outside air temperature outside the warehouse and heat generated through the outer box 102 by the heating means 135 that is higher than the outside air. In addition to the heat that moves into the storage chamber 106 due to the heat conduction of the metal, it is also considered that the heat of the heating means 135 moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 and enters. It is a thing.

  On the side surface of the opening, since the temperature is substantially equal to that of the heating means 135 up to the tip of the folded flange of the metal receiving portion 123, it can be seen that the contribution of the heat insulation distance, that is, the d2 dimension in FIG. It can be seen that, as in the prior art, the wall thickness of the side heat insulating wall 134 set only by the temperature difference between the inside and outside of the storage chamber has a smaller d2 dimension, that is, a smaller heat insulating distance and a very large amount of intrusion heat.

  FIG. 18 shows the relationship between the amount of heat entering the storage room of the refrigerator and the heat insulation wall thickness ratio (values obtained by dividing the average value of b dimension, c dimension, and d dimension by a dimension) in Embodiment 4 of the present invention. It is a thing. The region I indicates a region where a dimension <b dimension, a dimension <c dimension, and a dimension <d dimension.

  From this, it can be seen that when the heat insulation wall thickness ratio is increased, the amount of heat penetration decreases, but increases again at a certain value. That is, when the volumetric efficiency indicating the volume ratio of the storage space with respect to the external shape is 30% to 70%, the heat insulating wall thickness that minimizes the amount of intrusion heat under the precondition that the external dimensions and storage volume of the refrigerator are appropriately maintained. A ratio <b dimension, a dimension <c dimension, and a dimension <d dimension. In particular, in the present embodiment, the heating means 135 is disposed between the metal receiving portion 123 and the inner box 103 so as to be in close contact with the metal receiving portion 123, thereby appropriately holding the heating means 135. However, the distance of the d1 dimension can be shortened and the d2 dimension can be lengthened, and the ratio of the d1 dimension to the d dimension can be secured at least 20%. Accordingly, not only heat that moves into the storage chamber 106 due to heat conduction of the metal receiving portion 123 through the outside air, but also heat that moves into the storage chamber 106 through the metal receiving portion 123 generated from the heating means 135 can be reduced. In the state where the influence of heat penetration into the inside is suppressed, dew condensation can be prevented efficiently.

Therefore, as in the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face in the front-rear direction, or the through-passage 115 is provided in the heat insulation wall covering the storage room 106 and the machine room 107. The wall thickness dimension b of the heat insulating partition wall 121 is larger than the wall thickness dimension of the heat insulating wall that is not, or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage room 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107 The heat insulation wall thickness dimension c of the bottom heat insulation wall 133 is larger than the wall thickness dimension a of the heat insulation wall facing each other, and the heat insulation wall thickness dimension where the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the storage chamber 106 Cover the machine room 107 The insulation wall thickness dimension d of the side insulation wall 134 is determined from the wall thickness dimension of the insulation wall without the through passage 115 in the insulation wall or the wall thickness dimension a of the insulation wall where the storage chamber 106 and the machine room 107 face each other. By enlarging, even when the heating means is provided, the intrusion heat through the heat insulating wall and the intrusion heat from the opening can be reduced comprehensively.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage chamber formed by the heat insulating box body 101 and the heat insulating door 119, The heating means 135 provided in front of the opening of the heat insulating box, the heat insulating partition wall 121 that partitions the storage chamber into a plurality of storage chambers, and the machine provided in the lower portion of the heat insulating box 101 that stores the compressor And the wall thickness of the heat insulating partition wall 121, the wall thickness of the bottom heat insulating wall 133 of the storage chamber 106, and the wall thickness of the side heat insulating wall 134 of the storage chamber 106, the storage chamber 106 and the machine chamber 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Larger than the wall thickness of the insulation wall Thus, even when a heating means is provided, the intrusion heat through the heat insulating wall and the intrusion heat from the opening are comprehensively reduced, cooling efficiency is improved, and a power-saving refrigerator is provided. be able to.

  Further, since the intrusion heat can be reduced and the temperature rise on the surface of the storage chamber can be prevented, the cool air circulates at a low temperature, so that the temperature distribution in the entire storage chamber 106 can be kept uniform.

  Further, the wall thickness of the side heat insulating wall 134 is not necessarily constant with respect to the depth direction of the storage room, that is, only the wall thickness of the side heat insulating wall 134 in the vicinity of the opening is stored in the storage room 106 and the machine room 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Even if it is larger than the wall thickness of the heat insulation wall, the same effect can be obtained.

  In addition, the heat insulation wall thickness dimension shown in this Embodiment is an example, and this invention is not limited to this dimension.

(Embodiment 5)
FIG. 19 is a plan cross-sectional view of the basic structure of the storage room adjacent to the machine room of the refrigerator in the fifth embodiment of the present invention. FIG. 20 is a front view of the basic structure of the storage room adjacent to the machine room of the refrigerator in the fifth embodiment of the present invention. FIG. 21 is an enlarged sectional view of a heat insulating door side part of a storage room adjacent to the machine room of the refrigerator in the fifth embodiment of the present invention.

  As shown in FIG. 19, the dimension d is a heat insulation wall thickness dimension of the side heat insulation wall 134 of the storage chamber 106.

  As shown in FIGS. 20 and 21, the metal gasket 123 integrally formed with the outer box 102 and the door gasket 122 are brought into close contact with the front surface of the side heat insulating wall 134 so as to cross the outside of the storage chamber, so that cold air is exposed to the outside. Prevents leakage.

  Further, the folded flange portion of the metal receiving portion 123 is embedded in the heat insulating box 101.

Further, in order to prevent the surface of the metal receiving part 123 from contacting the outside air or the surface of the outer box 102 between the folded flange part of the metal receiving part 123 and the outer box 102, heating means 135 (here, , A heat radiating pipe) is provided and is in close contact with the outer box 102. The heating means 135 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the surfaces of the metal receiving portion 123 and the outer box 102 with the heat.

  The heat radiating pipe is an example of the heating means in the present invention.

  Further, the metal receiving portions 123 on the four sides on the front surface of the opening are configured so as to contact the end surfaces.

  Here, the dimension d1 is the width dimension from the side surface of the outer box 102 to the end of the metal funnel 123, and the dimension d2 is the width dimension from the front end of the metal receiver 123 to the storage chamber 106, that is, the heat insulation distance. . The d1 dimension is fixed.

  In the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the insulation wall that does not have the through passage 115 in the insulation wall that covers the storage room 106 and the machine room 107. The wall thickness dimension b or the wall thickness dimension b (= b1 + b2) of the heat insulating partition wall 121 is larger than the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other. Is the thickness dimension of the heat insulating wall facing the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107 The heat insulation wall thickness dimension c (= c1 + c2) of the bottom heat insulation wall 133 is larger than the wall thickness dimension a of the heat insulation wall facing each other, and the heat insulation wall thickness dimension where the storage chamber 106 and the machine room 107 face in the front-rear direction, or Storage room 106 and Heat insulation of the side heat insulation wall 134 from the wall thickness dimension of the heat insulation wall that does not have the through passage 115 in the heat insulation wall covering the machine room 107 or the wall thickness dimension a of the heat insulation wall where the storage room 106 and the machine room 107 face each other. The wall thickness dimension d (= d1 + d2) is increased.

  Specifically, in this embodiment, the heat insulation wall thickness dimension a between the storage chamber 106 and the machine room 107 is 60 mm, and the wall thickness dimension b of the heat insulation partition wall 121 is 70 mm (b1 dimension is 49 mm, b2 dimension is 21 mm), the heat insulating wall thickness c of the bottom heat insulating wall 133 is 71 mm (c1 is 41 mm, c2 is 30 mm), and the heat insulating wall thickness d of the side heat insulating wall 134 is 65 mm (d1 is 20 mm, d2 is 45 mm). It is.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. In addition, description about the operation | movement and effect | action similar to Embodiment 1 or 2 or 3 or 4 is abbreviate | omitted.

  In the fifth embodiment, regarding the heat entering the storage chamber, the metal receiving portion 123 is caused by heat based on the outside air temperature outside the warehouse and heat generated through the outer box 102 by the heating means 135 that is higher than the outside air. In addition to the heat that moves into the storage chamber 106 due to the heat conduction of the metal, it is also considered that the heat of the heating means 135 moves into the storage chamber 106 due to the heat conduction of the metal receiving portion 123 and enters. It is a thing.

  On the side surface of the opening, since the temperature is substantially equal to that of the heating means 135 up to the end of the folded flange of the metal receiving portion 123, it can be seen that the contribution of the heat insulation distance, that is, the d2 dimension in FIG. It can be seen that, as in the prior art, the wall thickness of the side heat insulating wall 134 set only by the temperature difference between the inside and outside of the storage chamber has a smaller d2 dimension, that is, a smaller heat insulating distance and a very large amount of intrusion heat.

  FIG. 22 shows the relationship between the amount of heat entering the storage room of the refrigerator and the heat insulation wall thickness ratio (the value obtained by dividing the average value of b dimension, c dimension, and d dimension by a dimension) in Embodiment 5 of the present invention. It is a thing. The region I indicates a region where a dimension <b dimension, a dimension <c dimension, and a dimension <d dimension.

  From this, it can be seen that when the heat insulation wall thickness ratio is increased, the amount of heat penetration decreases, but increases again at a certain value. That is, when the volumetric efficiency indicating the volume ratio of the storage space with respect to the external shape is 30% to 70%, the heat insulating wall thickness that minimizes the amount of intrusion heat under the precondition that the external dimensions and storage volume of the refrigerator are appropriately maintained. A ratio <b dimension, a dimension <c dimension, and a dimension <d dimension. In particular, in the present embodiment, the heating means 135 is disposed between the folded flange portion of the metal receiving portion 123 and the outer box 102 so as to be in close contact with the outer box. The distance d1 can be shortened and the dimension d2 can be lengthened, while the ratio of the dimension d1 to the dimension d can be at least 20%. Accordingly, not only heat that moves into the storage chamber 106 due to heat conduction of the metal receiving material 123 through the outside air, but also heat that moves into the storage chamber 106 through the metal receiving portion 123 generated from the heating means 135 can be reduced. In the state where the influence of heat penetration into the inside is suppressed, dew condensation can be prevented more efficiently. Further, since the heating means 135 is in close contact with the outer box 102, the assembly is easy and the dimensions can be maintained with high accuracy.

  Therefore, as in the present embodiment, the insulation wall thickness dimension in which the storage chamber 106 and the machine room 107 face in the front-rear direction, or the through-passage 115 is provided in the heat insulation wall covering the storage room 106 and the machine room 107. The wall thickness dimension b of the heat insulating partition wall 121 is larger than the wall thickness dimension of the heat insulating wall that is not, or the wall thickness dimension a of the heat insulating wall where the storage chamber 106 and the machine room 107 face each other, and the storage room 106 and the machine room 107 Is the thickness dimension of the heat insulating wall facing the front-rear direction, or the wall thickness dimension of the heat insulating wall that does not have the through passage 115 in the heat insulating wall covering the storage room 106 and the machine room 107, or the storage room 106 and the machine room 107 The heat insulation wall thickness dimension c of the bottom heat insulation wall 133 is larger than the wall thickness dimension a of the heat insulation wall facing each other, and the heat insulation wall thickness dimension where the storage chamber 106 and the machine room 107 face each other in the front-rear direction, or the storage chamber 106 Cover the machine room 107 The insulation wall thickness dimension d of the side insulation wall 134 is determined from the wall thickness dimension of the insulation wall without the through passage 115 in the insulation wall or the wall thickness dimension a of the insulation wall where the storage chamber 106 and the machine room 107 face each other. By enlarging, even when the heating means is provided, the intrusion heat through the heat insulating wall and the intrusion heat from the opening can be reduced comprehensively.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage chamber formed by the heat insulating box body 101 and the heat insulating door 119, The heating means 135 provided in front of the opening of the heat insulating box, the heat insulating partition wall 121 that partitions the storage chamber into a plurality of storage chambers, and the machine provided in the lower portion of the heat insulating box 101 that stores the compressor And the wall thickness of the heat insulating partition wall 121, the wall thickness of the bottom heat insulating wall 133 of the storage chamber 106, and the wall thickness of the side heat insulating wall 134 of the storage chamber 106, the storage chamber 106 and the machine chamber 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Larger than the wall thickness of the insulation wall Thus, even when a heating means is provided, the intrusion heat through the heat insulating wall and the intrusion heat from the opening are comprehensively reduced, cooling efficiency is improved, and a power-saving refrigerator is provided. be able to.

  Further, since the intrusion heat can be reduced and the temperature rise on the surface of the storage chamber can be prevented, the cool air circulates at a low temperature, so that the temperature distribution in the entire storage chamber 106 can be kept uniform.

  Further, the wall thickness of the side heat insulating wall 134 is not necessarily constant with respect to the depth direction of the storage room, that is, only the wall thickness of the side heat insulating wall 134 in the vicinity of the opening is stored in the storage room 106 and the machine room 107. Is the thickness of the heat insulating wall facing the front-rear direction, or the wall thickness of the heat insulating wall that does not have the through passage 115 in the heat insulating walls covering the storage chamber 106 and the machine chamber 107, or the storage chamber 106 and the machine chamber 107 are facing each other. Even if it is larger than the wall thickness of the heat insulation wall, the same effect can be obtained.

  In addition, the heat insulation wall thickness dimension shown in this Embodiment is an example, and this invention is not limited to this dimension.

  As described above, the refrigerator according to the present invention can be applied to a household or commercial refrigerator or a vegetable storage.

DESCRIPTION OF SYMBOLS 100 Refrigerator 101 Heat insulation box 104, 105, 106 Storage room 107 Machine room 108 Compressor 115 Through passage 117, 118, 119 Heat insulation door 120, 121 Heat insulation partition wall 133 Bottom heat insulation wall 134 Side heat insulation wall 135 Heating means

Claims (8)

A heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and a heat insulating partition that partitions the storage chamber into a plurality of storage chambers. A wall and a machine room provided in a lower part of the heat insulation box that houses the compressor, and the wall of the heat insulation partition wall that has the largest wall thickness among the heat insulation walls covering the machine room Refrigerator larger than thickness. A heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and a heat insulating partition that partitions the storage chamber into a plurality of storage chambers. A wall and a machine room provided in a lower part of the heat insulation box that houses the compressor, and a wall thickness of the heat insulation partition wall is larger than a wall thickness of the heat insulation wall facing the machine room in the front-rear direction. Refrigerator. A heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and a heat insulating partition that partitions the storage chamber into a plurality of storage chambers. A wall and a machine room provided in a lower part of the heat insulation box that houses the compressor, and the wall thickness of the heat insulation partition wall is insulated without a through passage in the heat insulation wall covering the machine room. Refrigerator larger than wall thickness. A heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and a heat insulating partition that partitions the storage chamber into a plurality of storage chambers. A wall and a machine room provided at a lower part of the heat insulation box for storing the compressor, and the wall thickness of the heat insulation partition wall facing the storage chamber side of the machine room A larger refrigerator. The refrigerator as described in any one of Claim 1 to 4 which provided the heating means in the opening part front surface of the said heat insulation box. The refrigerator according to any one of claims 1 to 5, wherein the storage room is a freezing room. The wall thickness of the bottom heat insulating wall forming the storage room is the largest part of the heat insulating wall covering the machine room, or the wall thickness of the heat insulating wall facing the machine room in the front-rear direction, or the machine The wall thickness of the heat insulation wall which does not have a through-passage in the heat insulation wall which covers a chamber, or the wall thickness of the heat insulation wall which faces the said storage chamber inside of the said machine room, It made larger in any one of Claim 1 to 6 The refrigerator described. The wall thickness of the side heat insulation wall forming the storage room is the largest part of the heat insulation wall covering the machine room, or the wall thickness of the heat insulation wall facing the machine room in the front-rear direction, or the machine The wall thickness of the heat insulation wall which does not have a through-passage in the heat insulation wall which covers a chamber, or the wall thickness of the heat insulation wall which faces the said storage chamber side of the said machine room, or larger in any one of Claim 1 to 7 The refrigerator described.